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Title: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on March 22, 2014, 01:07:41 PM http://cex.io/informer/lucabe/27566e8958f4e4c6f744030c384e7472/ (https://cex.io/r/0/lucabe/0/)
I don't think it's possible to break anything with this mod, but in case you break something, I'm not responsible Why undervolt the antminer s1 ? Because with default voltage (1.1v), the chip has a very bad efficiency https://i.imgur.com/wOhy80a.png What are the results ? I wanted to achieve 0.85v on the asic. ( you can go at 0.75v if you want and share the result) With this voltage my 3 antminer s1 are hashing at 140 GH/s each for 500 watts (166 watts per ant) (corsair AX1200i) [1.19W/gh at the wall] all my ants have less than 1 % of HW (0.95 0.5 0.3) What is needed ?
The following value works for an antminer with R3 resistor = 4.47 kOhms https://i.imgur.com/VN07slQ.jpg https://i.imgur.com/VN07slQ.jpg When adding pencil on R3, the result will be a lower voltage on the chip, so it's difficult to burn anything by doing it. Voltage :
Freq (275 MHz): edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' https://i.imgur.com/Mnnj8Bn.png tips : 18Qauboa6wLq3pzzNWm8ppjSeHzqJEXRhb (BTC) F28JPPyP2iQT1BH6w8qYR79tGGzS54h5g8(HBN) WmUBNpvaaQk1a3hdfrkKgz8V6w9pjwvjYN(WDC) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 22, 2014, 01:47:53 PM I don't think it's possible to break anything with this mod, but in case you break something, I'm not responsible Why undervolt the antminer s1 ? Because with default voltage (1.1v), the chip has a very bad efficiency What are the results ? I wanted to achieve 0.85v on the asic. ( you can go at 0.75v if you want and share the result) With this voltage my 3 antminer s1 are hashing at 140 GH/s each for 500 watts (166 watts per ant) (corsair AX1200i) [1.19W/gh at the wall] all my ants have less than 1 % of HW (0.95 0.5 0.3) What is needed ?
The following value works for an antminer with R3 resistor = 4.47 kOhms https://i.imgur.com/VN07slQ.jpg https://i.imgur.com/VN07slQ.jpg When adding pencil on R3, the result will be a lower voltage on the chip, so it's difficult to burn anything by doing it. Voltage :
Freq (275 MHz): edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' tips : 18Qauboa6wLq3pzzNWm8ppjSeHzqJEXRhb (BTC) F28JPPyP2iQT1BH6w8qYR79tGGzS54h5g8(HBN) WmUBNpvaaQk1a3hdfrkKgz8V6w9pjwvjYN(WDC) Will try, you are awesome! Thanks for sharing! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 22, 2014, 02:06:34 PM nice job!
however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: lucazane on March 22, 2014, 02:10:29 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus Depend on how much Amp you have. I was close to the limit and I will receive some miner (hex8) next week, so I needed power ^^ Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 22, 2014, 02:25:24 PM It is not a bad idea to underclock an S1 at this period. They are inexpensive and can compete the 28nm, as on power requirements.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: Littleshop on March 22, 2014, 02:29:53 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 22, 2014, 02:35:39 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. No more space? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 22, 2014, 03:54:05 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 22, 2014, 04:11:28 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Some of us, want to invest more in mining. I operate 24 ants and I am on power limit. Only solution to increase my hashing speed is either to replace all ants with 1w/1ghs fresh equipment , OR to underclock the existent ants for better efficiency. With this method, I can increase my hashing speed from 4.9Th/s to 8.5Th/s and maintain the same power requirements. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: Littleshop on March 22, 2014, 04:24:35 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Some of us, want to invest more in mining. I operate 24 ants and I am on power limit. Only solution to increase my hashing speed is either to replace all ants with 1w/1ghs fresh equipment , OR to underclock the existent ants for better efficiency. With this method, I can increase my hashing speed from 4.9Th/s to 8.5Th/s and maintain the same power requirements. Plus your ants will probably last longer. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 22, 2014, 04:32:55 PM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Some of us, want to invest more in mining. I operate 24 ants and I am on power limit. Only solution to increase my hashing speed is either to replace all ants with 1w/1ghs fresh equipment , OR to underclock the existent ants for better efficiency. With this method, I can increase my hashing speed from 4.9Th/s to 8.5Th/s and maintain the same power requirements. Plus your ants will probably last longer. You are right, definitely will last longer. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: crazyates on March 22, 2014, 06:53:55 PM VERY NICE! Glad to hear it worked so successfully for you!
I'm assuming your temps are also a LOT lower? You could probably run a normal 120mm case fan on idle and it would cool the whole thing, right? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: wpgdeez on March 22, 2014, 07:08:37 PM In the pics its showing low 30's with 1500 rpm fan speed. Nice.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: lucazane on March 22, 2014, 07:20:32 PM In the pics its showing low 30's with 1500 rpm fan speed. Nice. I'am not running the default fan, I am running the Delta PFC1212DE-PWM (the default fan of 2/3 antminer s1 was not starting, so I change the 3 fan to have the same) : With the default fan and stock clock, I had 45/47 for 2000 RPM) With the Delta PFC1212DE-PWM and stock clock, I had 40/41 for 2040 RPM) With the Delta PFC1212DE-PWM and pencil mod @ 0.85v/275Mhz, I got 35/34 for 1500 RPM and it's fucking silent ! At 2000 RPM, the Delta PFC1212DE-PWM make a little more noise than the default fan but at 1500 RPM it's like a church ! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: jelin1984 on March 23, 2014, 12:30:27 AM Can you give more details how we apply pencil hb and and which because at first photo you have the heatsink and I can not see good
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: cyberspaced on March 23, 2014, 01:21:13 AM Can you give more details how we apply pencil hb and and which because at first photo you have the heatsink and I can not see good The resistors are all marked R3 on the board. How to apply the graphite: http://www.youtube.com/watch?v=LNXSHpPACGs But don't try this mod if you haven't got a multimeter!! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 23, 2014, 01:35:03 AM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Some of us, want to invest more in mining. I operate 24 ants and I am on power limit. Only solution to increase my hashing speed is either to replace all ants with 1w/1ghs fresh equipment , OR to underclock the existent ants for better efficiency. With this method, I can increase my hashing speed from 4.9Th/s to 8.5Th/s and maintain the same power requirements. Plus your ants will probably last longer. In order to grow from 4.9Th to 8.5Th you would have to go from 24 antminers to 45 units if all run at ~200GH overclocked. If underclocking to ~150GH, you are looking at 57 miners. that means paying >32 BTC in order to add 3.6TH (or 12BTC/TH) underclocking at this point is a terrible idea. either create a second mining location or sell the antminers to buy 1TH/1000W units (s2 or another company) - otherwise you are thrpowing away your earnings Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 23, 2014, 08:31:13 AM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. only if you want to earn 20-30% less from the unit at the benefit of saving a dollar a day on electricity - but if that still looks like a good use of your miner go for it. I was at my limits of power/heat/noise and I came up with a simple solution. I found a larger space to run my miners that had better cooling capabilities, and I spent $1500 installing 18kW of new circuits and some shelving units. I went from a limit of 9 antminers to operating 14 now, and have an S2 ordered also. In this game, i dont see why you would willingly reduce your hashrate at this point in time - I might do it once july hits and the difficulty/temperatures play a more significant factor, but right now is the best time to run the machine at it full capability Some of us, want to invest more in mining. I operate 24 ants and I am on power limit. Only solution to increase my hashing speed is either to replace all ants with 1w/1ghs fresh equipment , OR to underclock the existent ants for better efficiency. With this method, I can increase my hashing speed from 4.9Th/s to 8.5Th/s and maintain the same power requirements. Plus your ants will probably last longer. In order to grow from 4.9Th to 8.5Th you would have to go from 24 antminers to 45 units if all run at ~200GH overclocked. If underclocking to ~150GH, you are looking at 57 miners. that means paying >32 BTC in order to add 3.6TH (or 12BTC/TH) underclocking at this point is a terrible idea. either create a second mining location or sell the antminers to buy 1TH/1000W units (s2 or another company) - otherwise you are thrpowing away your earnings I cannot undestand your calculations. Lets start again. I need 57 miners to reach the 8.5 Th/s , as underclocked. I already hold 24 miners, so I need 33 pcs more. Which you agree on this. 33 pcs , as underclocked will hash approximately at 5 Th/s ( 33 x 150 = 4,950 Gh/s). 33 pcs normaly cost 33x0.938 = 31 BTC. So, 31BTC / 5 Th/s = 6.2BTC per Th/s. Which is lower than any preorder S2 (6.37BTC PREORDER CLOSED) S1s are ready to go from Bitmain , can order as many as you want. Plus I have 40 S1 coupons waiting with 0.12BTC each, where I could buy S1s for 0.81BTC and making cost of 5.35BTC per Th/s. So no need to sell anything, as I will lose on ebay fees plus I will lose hash time reducing my hashing speed. . Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: jayman on March 23, 2014, 09:45:13 AM interesting idea to save power costs and get more hashing power, i think 1 thing people also tend to forget when mining is if 1 of your ants goes down it's a small dent in your mining power but if 1 of your th's units goes down it's a serious dent in your hashing power and will cost alot of potential earnings until it's running again or replaced that's something to think about and worth considering also.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 23, 2014, 10:08:05 AM interesting idea to save power costs and get more hashing power, i think 1 thing people also tend to forget when mining is if 1 of your ants goes down it's a small dent in your mining power but if 1 of your th's units goes down it's a serious dent in your hashing power and will cost alot of potential earnings until it's running again or replaced that's something to think about and worth considering also. Indeed, as of course ants have shown great durability , and are tested to last. I have no clue about the S2 or the Dragon products about their credibility. The downs are only, you need more cabling and definitely more space to handle so many ants. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: Syke on March 23, 2014, 03:33:14 PM Nice mod. Undervolting has a far greater effect than underclocking does on profitability. I'll be looking at doing some undervolting in a few months when summer rolls around.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: crazyates on March 23, 2014, 06:34:23 PM In order to grow from 4.9Th to 8.5Th you would have to go from 24 antminers to 45 units if all run at ~200GH overclocked. I need 57 miners to reach the 8.5 Th/s , as underclocked.If underclocking to ~150GH, you are looking at 57 miners. that means paying >32 BTC in order to add 3.6TH (or 12BTC/TH) I already hold 24 miners, so I need 33 pcs more. Which you agree on this. 33 pcs , as underclocked will hash approximately at 5 Th/s ( 33 x 150 = 4,950 Gh/s). 33 pcs normaly cost 33x0.938 = 31 BTC. So, 31BTC / 5 Th/s = 6.2BTC per Th/s. Which is lower than any preorder S2 (6.37BTC PREORDER CLOSED) 1) 24 OC units running 4.9TH/s @ ~9.9kW (200GH/s + 410W each) 2) 45 OC units running 9.0TH/s @ ~18.5kW (200GH/s + 410W each) 3) 57 UV units running 8.0TH/s @ ~9.5kW ( 140Gh/s + 166W each) 4) 24 OC + 33UV gets 9.4TH/s @ ~15.3kW (200GH/s + 410W for the OC, and 140GH/s + 166W for the UV) I think he's talking about moving from setup 1) to setup 3), which would increase your hashrate, keep you at your same power, and cost you 31BTC. You're talking above moving from setup 1) to setup 4). Yes, 33 UV Ants would get you ~5TH/s, but you're not looking at the loss of hashrate that you'd be getting from undervolting the other 24 units. Moving the original 24 Ants from 200 to 140 loses you ~1440GH/s, while you'd be gaining ~4950GH/s, netting an increase of ~3.5TH/s. Think of it this way: You have 5 Ants that are running 200GH/s @ 410W. You're getting exactly 1TH/s @ 2050W. If you were to add 2 Ants, and undervolt all 7 of them to 140GH/s @ 166W, you're looking at a combined 980GH/s @ 1160W. You paid 1.88BTC (not including coupons/discounts) to stay at the same hashrate, and drop your power consumption. At current Coinbase, that 1.88BTC = ~$1050 USD. Moving from 2050W to 1160 saves you 890W, which at $0.14/kW, is ~$90 USD/month. You're paying $1050 up front to save $90/month. Might not be worth it. This same calculation is the same whether you're buying all your Ants now, or buying some ants to compensate for undervolting your existing farm. If you're looking at buying now, and you have to choose between 5 and 7, you're still ordering 2 extra units to save power. The only scenario this is beneficial is either A) You're running into massive temp issues, and cant seem to get these things cool, and they're constantly being cooked and destroying themselves (aka you live in a desert), or B) you're up against a power limit, and this is the only way to increase your hashrate. I think Tzortz fits into this category, so it might not be an entirely bad idea. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 23, 2014, 06:45:20 PM In order to grow from 4.9Th to 8.5Th you would have to go from 24 antminers to 45 units if all run at ~200GH overclocked. I need 57 miners to reach the 8.5 Th/s , as underclocked.If underclocking to ~150GH, you are looking at 57 miners. that means paying >32 BTC in order to add 3.6TH (or 12BTC/TH) I already hold 24 miners, so I need 33 pcs more. Which you agree on this. 33 pcs , as underclocked will hash approximately at 5 Th/s ( 33 x 150 = 4,950 Gh/s). 33 pcs normaly cost 33x0.938 = 31 BTC. So, 31BTC / 5 Th/s = 6.2BTC per Th/s. Which is lower than any preorder S2 (6.37BTC PREORDER CLOSED) 1) 24 OC units running 4.9TH/s @ ~9.9kW (200GH/s + 410W each) 2) 45 OC units running 9.0TH/s @ ~18.5kW (200GH/s + 410W each) 3) 57 UV units running 8.0TH/s @ ~9.5kW ( 140Gh/s + 166W each) 4) 24 OC + 33UV gets 9.4TH/s @ ~15.3kW (200GH/s + 410W for the OC, and 140GH/s + 166W for the UV) I think he's talking about moving from setup 1) to setup 3), which would increase your hashrate, keep you at your same power, and cost you 31BTC. You're talking above moving from setup 1) to setup 4). Yes, 33 UV Ants would get you ~5TH/s, but you're not looking at the loss of hashrate that you'd be getting from undervolting the other 24 units. Moving the original 24 Ants from 200 to 140 loses you ~1440GH/s, while you'd be gaining ~4950GH/s, netting an increase of ~3.5TH/s. Think of it this way: You have 5 Ants that are running 200GH/s @ 410W. You're getting exactly 1TH/s @ 2050W. If you were to add 2 Ants, and undervolt all 7 of them to 140GH/s @ 166W, you're looking at a combined 980GH/s @ 1160W. You paid 1.88BTC (not including coupons/discounts) to stay at the same hashrate, and drop your power consumption. At current Coinbase, that 1.88BTC = ~$1050 USD. Moving from 2050W to 1160 saves you 890W, which at $0.14/kW, is ~$90 USD/month. You're paying $1050 up front to save $90/month. Might not be worth it. This same calculation is the same whether you're buying all your Ants now, or buying some ants to compensate for undervolting your existing farm. If you're looking at buying now, and you have to choose between 5 and 7, you're still ordering 2 extra units to save power. The only scenario this is beneficial is either A) You're running into massive temp issues, and cant seem to get these things cool, and they're constantly being cooked and destroying themselves (aka you live in a desert), or B) you're up against a power limit, and this is the only way to increase your hashrate. I think Tzortz fits into this category, so it might not be an entirely bad idea. Exactly this! :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 23, 2014, 08:46:25 PM In order to grow from 4.9Th to 8.5Th you would have to go from 24 antminers to 45 units if all run at ~200GH overclocked. I need 57 miners to reach the 8.5 Th/s , as underclocked.If underclocking to ~150GH, you are looking at 57 miners. that means paying >32 BTC in order to add 3.6TH (or 12BTC/TH) I already hold 24 miners, so I need 33 pcs more. Which you agree on this. 33 pcs , as underclocked will hash approximately at 5 Th/s ( 33 x 150 = 4,950 Gh/s). 33 pcs normaly cost 33x0.938 = 31 BTC. So, 31BTC / 5 Th/s = 6.2BTC per Th/s. Which is lower than any preorder S2 (6.37BTC PREORDER CLOSED) 1) 24 OC units running 4.9TH/s @ ~9.9kW (200GH/s + 410W each) 2) 45 OC units running 9.0TH/s @ ~18.5kW (200GH/s + 410W each) 3) 57 UV units running 8.0TH/s @ ~9.5kW ( 140Gh/s + 166W each) 4) 24 OC + 33UV gets 9.4TH/s @ ~15.3kW (200GH/s + 410W for the OC, and 140GH/s + 166W for the UV) I think he's talking about moving from setup 1) to setup 3), which would increase your hashrate, keep you at your same power, and cost you 31BTC. You're talking above moving from setup 1) to setup 4). Yes, 33 UV Ants would get you ~5TH/s, but you're not looking at the loss of hashrate that you'd be getting from undervolting the other 24 units. Moving the original 24 Ants from 200 to 140 loses you ~1440GH/s, while you'd be gaining ~4950GH/s, netting an increase of ~3.5TH/s. Think of it this way: You have 5 Ants that are running 200GH/s @ 410W. You're getting exactly 1TH/s @ 2050W. If you were to add 2 Ants, and undervolt all 7 of them to 140GH/s @ 166W, you're looking at a combined 980GH/s @ 1160W. You paid 1.88BTC (not including coupons/discounts) to stay at the same hashrate, and drop your power consumption. At current Coinbase, that 1.88BTC = ~$1050 USD. Moving from 2050W to 1160 saves you 890W, which at $0.14/kW, is ~$90 USD/month. You're paying $1050 up front to save $90/month. Might not be worth it. This same calculation is the same whether you're buying all your Ants now, or buying some ants to compensate for undervolting your existing farm. If you're looking at buying now, and you have to choose between 5 and 7, you're still ordering 2 extra units to save power. The only scenario this is beneficial is either A) You're running into massive temp issues, and cant seem to get these things cool, and they're constantly being cooked and destroying themselves (aka you live in a desert), or B) you're up against a power limit, and this is the only way to increase your hashrate. I think Tzortz fits into this category, so it might not be an entirely bad idea. thanks for going into depth - i guess my brief post originally was not clear enough. As mentioned, you are looking at a lot more actual miners to setup and maintain in order to recoup whatever power savings over a period of about 10 months. IMO, you are better off running what you can right now, and trying to sell off the antminers for top dollar (you can probably fetch 1-1.5BTC each) and re-investing into dedicated 1TH/<1kW devices. as it stands 7 miners undervolted = 980GH/1160W for ~6.6BTC 1TH/1kW miner = $3500-4000 (about 6.6BTC at current prices - I assume the cash prices will drop soon to accomodate the lower BTC rate) you would still be drawing less power, and fewer units overall. However, if power is your limiting factor you should look into opportunities to operate miners in other locations. underclocking is throwing away profits right now. (In a month or two it would make more sense of course) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: crazyates on March 23, 2014, 09:05:27 PM you would still be drawing less power, and fewer units overall. However, if power is your limiting factor you should look into opportunities to operate miners in other locations. underclocking is throwing away profits right now. (In a month or two it would make more sense of course) We're getting ready to UC/UV, not so that we can convert our entire farm over now, but so that we can prep for the future.My math says that with the current price, it's worth it to OC until the diff reaches somewhere around 150PH/s. After that, it's more profitable to UV. When that time comes, Ant S1s won't be worth 0.938BTC. They'll be worth a fraction of that. If I bring up that 5->7 Ant scenario again, but this time it only costs me 0.25BTC/Ant to upgrade, it'll only cost me 0.5BTC ($280 USD) to save me $90 USD/month in power. That's worth it to me! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 24, 2014, 02:04:25 AM ^in a month or two time is a different story. my point was just that switching today would be a bad decision with regards to profitability. :)
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: crazyates on March 24, 2014, 02:12:22 AM ^in a month or two time is a different story. my point was just that switching today would be a bad decision with regards to profitability. :) Sometimes, I forgot that I don't have to argue with people who agree with my standpoint. ;)Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: klondike_bar on March 24, 2014, 03:29:51 AM ^in a month or two time is a different story. my point was just that switching today would be a bad decision with regards to profitability. :) Sometimes, I forgot that I don't have to argue with people who agree with my standpoint. ;)Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: lucazane on March 26, 2014, 07:01:32 PM for information, the mod is stable for 4 days !
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: tzortz on March 26, 2014, 09:54:25 PM for information, the mod is stable for 4 days ! Well done! Good news! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: claudesdad on March 29, 2014, 01:06:43 PM I've got to say, I'd be really interested in knowing what kind of math people are using to try and make the mining thing work.
Looking at the prices of the 1 and 2 TH units that are coming out - and running that thru one of the mining calculators - I'm really at a loss to see where anybody is ever going to make the money back on those units. Even looking at another example: the cost of an S1 right now - which is ~ $446.50 ( ~$500 per BTC X .893BTC on Bitmain) - and then plug that into one of the calculators - and what I get at the current difficulty level - is 54 days to pay the machine off. If I plug in the estimated next difficulty level of 6,085,479,004 - that goes up to 69 days, and even that is not bringing into account subsequent difficulty level increases. Just throw in 8,085,479,004 (because I don't feel like trying to calculate where the higher difficulty levels will actually come out) - and you're talking 100 days to pay the machine off. I gotta say I'm beginning to see the viewpoint of all the people who are saying that the mining thing is just a losing game. The numbers simply don't work. Granted - all the above numbers are based on the current BTC price. But even if I bump the BTC price up to $700 - that last calc of 100 days only goes back down to 65 days (all other factors being equal) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: crazyates on March 29, 2014, 04:33:50 PM I've got to say, I'd be really interested in knowing what kind of math people are using to try and make the mining thing work. Looking at the prices of the 1 and 2 TH units that are coming out - and running that thru one of the mining calculators - I'm really at a loss to see where anybody is ever going to make the money back on those units. Even looking at another example: the cost of an S1 right now - which is ~ $446.50 ( ~$500 per BTC X .893BTC on Bitmain) - and then plug that into one of the calculators - and what I get at the current difficulty level - is 54 days to pay the machine off. If I plug in the estimated next difficulty level of 6,085,479,004 - that goes up to 69 days, and even that is not bringing into account subsequent difficulty level increases. Just throw in 8,085,479,004 (because I don't feel like trying to calculate where the higher difficulty levels will actually come out) - and you're talking 100 days to pay the machine off. I gotta say I'm beginning to see the viewpoint of all the people who are saying that the mining thing is just a losing game. The numbers simply don't work. Granted - all the above numbers are based on the current BTC price. But even if I bump the BTC price up to $700 - that last calc of 100 days only goes back down to 65 days (all other factors being equal) https://tradeblock.com/mining/a/e2b6bd9a70 Try playing with different numbers on there. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: GenTarkin on March 29, 2014, 05:05:34 PM meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on March 29, 2014, 06:44:34 PM meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong. Holly! We need some explanation here! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on March 29, 2014, 07:10:04 PM meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong. thats very good - i did not expect them to be capable of much more than 205GH even with pencil mod. did you have to add a second fan or shrouding at all? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on March 29, 2014, 08:19:52 PM meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong. Holly! We need some explanation here! The same as I did but with the resistor R12 (the one at the left of R3). It will increase the voltage at the chip, so be carefull :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: GenTarkin on March 29, 2014, 08:24:12 PM meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong. thats very good - i did not expect them to be capable of much more than 205GH even with pencil mod. did you have to add a second fan or shrouding at all? Yeah, I just vmodded one of my '14 units to around 1.15-1.16v per 'module' Its doing 431mhz @ .55% HW @ 219.5GH for the last 4hrs ... =) (previously the same unit has been at 425mhz @ .18% HW @ 216GH for a few days...) I may try it on my other 2 '14 units tonight. My '13 units dont vmod as well =/ NOTE: no, didnt modify cooling and this particular ant is running at an avg of 44C Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jjiimm_64 on March 30, 2014, 03:12:14 PM awsome mod. I applied it and set the clock at 325. 165 Gh pulling 277watts at the wall normally 190gh pulls 380watts Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jelin1984 on March 30, 2014, 08:50:34 PM We need only the pencil?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Raptor2213 on March 31, 2014, 12:57:35 AM Good to know. This mod makes the S1s theoretically cheaper per Ghash than the S2 without sacrificing much power consumption.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: topminingcontracts on March 31, 2014, 10:07:01 PM ^in a month or two time is a different story. my point was just that switching today would be a bad decision with regards to profitability. :) Sometimes, I forgot that I don't have to argue with people who agree with my standpoint. ;)Well even if may void guarantee.... The guy is a genius. Congrats Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Threader on March 31, 2014, 10:29:47 PM awsome mod. I applied it and set the clock at 325. 165 Gh pulling 277watts at the wall normally 190gh pulls 380watts Good to know. This mod makes the S1s theoretically cheaper per Ghash than the S2 without sacrificing much power consumption. According to Jim above's volt mod experience S2 are still much better for power consumption for not much more BTC which i foresee batch 3 to be priced around $3000. 1000gh / 165 = 6.061 x 277 wall watts = 1678 watts 6.061 x S1's = 5.41 BTC Now add the cost of all the power supplies needed for 6 x S1's and the S2 batch 3 will clearly be the smarter option by far. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 01, 2014, 04:52:39 AM awsome mod. I applied it and set the clock at 325. 165 Gh pulling 277watts at the wall normally 190gh pulls 380watts Good to know. This mod makes the S1s theoretically cheaper per Ghash than the S2 without sacrificing much power consumption. According to Jim above's volt mod experience S2 are still much better for power consumption for not much more BTC which i foresee batch 3 to be priced around $3000. 1000gh / 165 = 6.061 x 277 wall watts = 1678 watts 6.061 x S1's = 5.41 BTC Now add the cost of all the power supplies needed for 6 x S1's and the S2 batch 3 will clearly be the smarter option by far. only keep in mind that for the next 2-3 month window, having 1.2TH/2.4kW is better than 1TH/1kW. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SVK on April 01, 2014, 08:58:33 AM Many thanks for a guide.
I see that yous are modifying S1 left and right ;D I have one spare blade with half of the chips not working and was wondering if there is any way I can use this half broken board ? It's the board which didn't have controller board attached to it. Is there any way to connect that board to RPi or even to existing and working S1 ? Thank you very much Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 01, 2014, 03:13:37 PM Many thanks for a guide. I see that yous are modifying S1 left and right ;D I have one spare blade with half of the chips not working and was wondering if there is any way I can use this half broken board ? It's the board which didn't have controller board attached to it. Is there any way to connect that board to RPi or even to existing and working S1 ? Thank you very much there may be a way to connect it to an upcoming S2 unit if they simply modified the voltage/clocks on the current blade design. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SVK on April 01, 2014, 03:51:53 PM Many thanks for a guide. I see that yous are modifying S1 left and right ;D I have one spare blade with half of the chips not working and was wondering if there is any way I can use this half broken board ? It's the board which didn't have controller board attached to it. Is there any way to connect that board to RPi or even to existing and working S1 ? Thank you very much there may be a way to connect it to an upcoming S2 unit if they simply modified the voltage/clocks on the current blade design. Many thanks for response Klondike :) I'm incapable to try anything like this on my own so thought it might be useful to ask on here. So many gurus on here :) Well I will keep board just in case :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 01, 2014, 06:50:22 PM Many thanks for a guide. I see that yous are modifying S1 left and right ;D I have one spare blade with half of the chips not working and was wondering if there is any way I can use this half broken board ? It's the board which didn't have controller board attached to it. Is there any way to connect that board to RPi or even to existing and working S1 ? Thank you very much there may be a way to connect it to an upcoming S2 unit if they simply modified the voltage/clocks on the current blade design. Many thanks for response Klondike :) I'm incapable to try anything like this on my own so thought it might be useful to ask on here. So many gurus on here :) Well I will keep board just in case :) Yeah, i cant think of anyway that you could connect it to an S1. AFAIK neither: a) cgminer settings are capable of detecting more than 2 boards b) 2 cards cannot share a dataline for double hashrate. you would either see a lot of duplicate throwaways or HW errors. I do not think it is a 'shared comms' type of connection where multiple boards in parallel would be capable of sharing instructions or hashing 'n-times' faster Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SVK on April 01, 2014, 07:50:29 PM Many thanks for a guide. I see that yous are modifying S1 left and right ;D I have one spare blade with half of the chips not working and was wondering if there is any way I can use this half broken board ? It's the board which didn't have controller board attached to it. Is there any way to connect that board to RPi or even to existing and working S1 ? Thank you very much there may be a way to connect it to an upcoming S2 unit if they simply modified the voltage/clocks on the current blade design. Many thanks for response Klondike :) I'm incapable to try anything like this on my own so thought it might be useful to ask on here. So many gurus on here :) Well I will keep board just in case :) Yeah, i cant think of anyway that you could connect it to an S1. AFAIK neither: a) cgminer settings are capable of detecting more than 2 boards b) 2 cards cannot share a dataline for double hashrate. you would either see a lot of duplicate throwaways or HW errors. I do not think it is a 'shared comms' type of connection where multiple boards in parallel would be capable of sharing instructions or hashing 'n-times' faster I was looking at possibility to solder USB on it or something else and then run it through RPi. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: vodic62 on April 05, 2014, 03:43:40 PM I have undervolted my Antminer to 1,0V (R3 = 3.9kOhm) and I am really happy with results. Before mod my antminer was consuming 348W on the wall on 180GH/s but now it takes only 260W on 165GH/s.
So 8,3% performance decrease means 25.3% power input decrease. Nice 8) I am running about hour now and no HW errors at all. I also tried 180GH/s with lowered voltage, but a lot of HW errors resulted in 170GH/s output performance too. Mod was really easy. 10 minutes of work and everything worked on the first try. Thanks for the guide. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 05, 2014, 03:57:31 PM Has nobody overclocked or overvolted an S2 yet?
640 chips (an S1 has 64 chips), 16 chips per TPS53355 regulator (S1 has 8 per) S1 was forcing around 30A through the regulator at stock speeds, and up to 40A with overclocking and some overvolting (based on some of the 210GH+ reports in this thread) S2 is putting about 22-24A on the regulator at stock. Presumably with a bit of voltage modding and overclocking the regulators could handle up to about 1.4TH/2kW only issues: 1) power. To seriously overclock, adding a 600W+ PSU will be necessary 2) cooling. More fans and/or individual chip heatsinks are necessary to properly exhaust any extra heat since the units read 50C+ temperatures stock 2b) PCI entenders. Looks like the boards are all mounted using PCI (PCIe 16x?) slots. if you used some risers (with a nice pair of 14AWG power cables to protect the risers) you could get the boards up out of the case and arrange them with airflow directly aimed at the heatsinks for better cooling. I can't wait for my batch 2 unit to arrive - if noone overclocks by then I might have to be the first. (donations will be accepted in case i kill my miner :p) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Zetler on April 08, 2014, 07:20:24 AM What are the risks of undervolting?
I don't know the physics of it, so please excuse my ignorance :D 1. If I undervolt but do not underclock, what will happen? Will HW errors simply increase, or do I risk the antminer getting damaged? 2. If I both undervolt and underclock, but it turns out I undervolted too much, the same logic applies as in #1? 3. I do not have a volt meter (and I dont know how to use one). Can I simply try with a little bit? The risk is applying too much graphite, not too little, right? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lowerjerzey on April 08, 2014, 03:15:57 PM Thanks for the guide, OP. I plan on sucking every last ounce out of profitability out of my S1s. This will definitely come in handy in a couple months.
Instead of pencil, I plan on a more permanent solution by soldering a 9.1K ohm resistor in parallel. I'm very new to soldering, so I won't dare to try to replace the flat resistor. I plan on just tinning the ends of the 9.1k resistor, hold it to the side of the flat resistor, then hitting the flat resistor with the iron to get it to tack. Then, repeat for the other side. Is this correct? Any suggestions would be appreciated. Also, is a 9.1K ohm resistor correct? r2 = (r1 * rtotal)/(r1 - rtotal) r2 = (4.47K * 3K)/(4.47K - 3K) r2 = 9.12K ohms Thanks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Threader on April 08, 2014, 03:28:47 PM if you are going to trouble yourself to soldering a solid resistor then it would make more sense to solder A POTentiometer and have the flexibility of adjustable resistor settings.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on April 08, 2014, 04:42:48 PM If you are going to pull off the resistors you had better have one big ass magnifying glass.
I've just completed this on one of my S1's to play with (able to put 0.6V to 1.2V to VDD of Bitmains chip now). I took some pictures and I'll try to get them on later today. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lowerjerzey on April 08, 2014, 04:50:12 PM if you are going to trouble yourself to soldering a solid resistor then it would make more sense to solder A POTentiometer and have the flexibility of adjustable resistor settings. That would be ideal for fine tuning but for being novice at soldering, wiring in a pot adds more difficulty than I am comfortable with. Tacking on a resistor to the sides of the existing resistor seems a little more doable for my skill level. And it's only $5 vs about $55 for the pots. But, now that I think about it more, pencil would work just fine. I wanted to add the resistor so I wouldn't have to worry about the graphite potentially flaking off. But even if it did, having them hooked to a kill a watt would show a rise in electricity use. Then I would just have to check each voltage to find the culprit and just add more pencil. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 08, 2014, 08:24:57 PM if you are going to trouble yourself to soldering a solid resistor then it would make more sense to solder A POTentiometer and have the flexibility of adjustable resistor settings. That would be ideal for fine tuning but for being novice at soldering, wiring in a pot adds more difficulty than I am comfortable with. Tacking on a resistor to the sides of the existing resistor seems a little more doable for my skill level. And it's only $5 vs about $55 for the pots. But, now that I think about it more, pencil would work just fine. I wanted to add the resistor so I wouldn't have to worry about the graphite potentially flaking off. But even if it did, having them hooked to a kill a watt would show a rise in electricity use. Then I would just have to check each voltage to find the culprit and just add more pencil. go with a pencil mod - i did it for my bitfury cards (exact same regulator with 2 voltage-controlling resisters) and it works great. It isnt worth the effort and risks of desoldering pcb components and swapping in new resistors when a few rubs with a pencil works fine. tips: 1) get an artist pencil such as a 3B instead of a 2. It is a bit softer and leaves a tiny bit more soft graphite for a rub - a little bit easier to tweak the resistance this way 2) start small. Over time, the pencil mod will 'age' and slightly decrease the resistance even frther than when it was first applied, as the graphite is baked by the hot pcb. leave a little bit of headroom when you do a mod, and expect the resulting voltage to drift a little bit over a 4-12 hour period. (drifts up if overvolting and down if undervolting) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on April 09, 2014, 04:46:45 PM Added link to my pictures of the 10k pot addition to S1's.
http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lowerjerzey on April 09, 2014, 06:31:23 PM Added link to my pictures of the 10k pot addition to S1's. http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) Nice job! *looks for a pencil* Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 09, 2014, 09:10:12 PM Added link to my pictures of the 10k pot addition to S1's. http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) https://i.imgur.com/bRgcnZT.jpg Now looks better. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on April 09, 2014, 11:12:44 PM Thanks couldn't see how to post the picture directly in the reply.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 06:26:38 AM Thanks couldn't see how to post the picture directly in the reply. When you post, over the window you type, there some small icons. On the left ones , you will find the one for posting pictures urls. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Zetler on April 10, 2014, 10:04:36 AM Before mod my antminer was consuming 348W on the wall on 180GH/s but now it takes only 260W on 165GH/s. Assuming $0.20/kWh Without undervolting: Daily $6.04 mined minus $1.67 electricity = $4.37 daily profit After undervolting: Daily $5.53 mined minus $1.20 electricity = $4.33 daily profit Right now we are at the point where undervolting starts making sense for those with expensive electricity. I am one of those. Just want to know the risks before I start doing it. I read about undervolting CPUs that the only risk is less stability, i.e. it may reboot now and then. I guess for Antminer that a symptom of too low voltage is high HW error. Right? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 10:32:19 AM Anyone willing to donate an ANT S1, and I will see about making a simple "snap-on" solution to "tune" the ant-miner a little safer? (A donation, because I can not guarantee its safety, while "playing with the mod".)
Pencil-graphite is not reliable to sustain long-term operation. It will eventually absorb salty humidity, from the air, and fail. (Great for a short-term adjustment. Pun intended.) You don't want that to fail, and your miner starts to pull full power, overloading your PSU. Or, on the reverse, under-volting too much, causing the amp-draw to rise on the regulator, which could stop them from working. Would be nice to see a software controlled variable voltage control there, or a hand-tuned pot, for some precision control. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 10:34:58 AM Anyone willing to donate an ANT S1, and I will see about making a simple "snap-on" solution to "tune" the ant-miner a little safer? Pencil-graphite is not reliable to sustain long-term operation. It will eventually absorb salty humidity, from the air, and fail. (Great for a short-term adjustment. Pun intended.) You don't want that to fail, and your miner starts to pull full power, overloading your PSU. Or, on the reverse, under-volting too much, causing the amp-draw to rise on the regulator, which could stop them from working. Would be nice to see a software controlled variable voltage control there, or a hand-tuned pot, for some precision control. You are joking, right? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 10:36:21 AM You are joking, right? (A donation, because I can not guarantee its safety, while "playing with the mod".)No I am not joking. I can assure it will be cared for. I just can not guarantee its safety. Figured that someone-else could use the mod-info, once it was posted. (As opposed to the alternative, which is a great idea BTW.) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 10:47:57 AM You are joking, right? (A donation, because I can not guarantee its safety, while "playing with the mod".)No I am not joking. I can assure it will be cared for. I just can not guarantee its safety. Figured that someone-else could use the mod-info, once it was posted. (As opposed to the alternative, which is a great idea BTW.) I am sorry but is already done: https://i.imgur.com/bRgcnZT.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 10:59:26 AM Not quite what I said... "snap-on mod"... But great! Works with a tuning-pot. (soldering is not for everyone.) P.S. Got the link to that thread? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 11:08:23 AM Not quite what I said... "snap-on mod"... But great! Works with a tuning-pot. (soldering is not for everyone.) P.S. Got the link to that thread? You can go one page backwards. 8) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 11:13:58 AM You can go one page backwards. 8) Sorry, missed the link above the pic... (You quoted, but left-out the link... Wanted a link to a thread, not just a photo-shoot. Assumed it had its own thread.) ;) :-* Thanks-again. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 11:22:35 AM You can go one page backwards. 8) Sorry, missed the link above the pic... (You quoted, but left-out the link... Wanted a link to a thread, not just a photo-shoot. Assumed it had its own thread.) ;) :-* Thanks-again. No prob. We need to ask Trend user for his results with the pots. As about snapping on, how could this be done? Glue or something? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 11:42:43 AM As about snapping on, how could this be done? Glue or something? No glue. :P I fabricate plastic parts, from cheap things... xD (Years of playing with plastic in an injection-molding plant, has led me to make some crazy contraptions from simple PP, PET and HDPE plastics.) By the looks of it, it would simply "slip-on", just under the HCM1305-R47-R (R47) inductor. Either taking advantage of the unused holes, above the heat-sink-mounting screws, or using the heat-sink-mounting screws to fasten a retainer-clip over the snap-on mod. The "fixed resistor value", or "swappable resistor", or "tuning pot", attached to the plastic, with the pins protruding for low-pressure contact on the SMT solder-points. (While the original SMT resistor remained in place, unharmed for integrity of the original miner setup.) P.S. Hot-glue is also great to make prefab plastic parts from. Hot-glue guns are essentially mini-injection-extrusion devices, if you tune the heat. :P Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 10, 2014, 12:07:35 PM As about snapping on, how could this be done? Glue or something? No glue. :P I fabricate plastic parts, from cheap things... xD (Years of playing with plastic in an injection-molding plant, has led me to make some crazy contraptions from simple PP, PET and HDPE plastics.) By the looks of it, it would simply "slip-on", just under the HCM1305-R47-R (R47) inductor. Either taking advantage of the unused holes, above the heat-sink-mounting screws, or using the heat-sink-mounting screws to fasten a retainer-clip over the snap-on mod. The "fixed resistor value", or "swappable resistor", or "tuning pot", attached to the plastic, with the pins protruding for low-pressure contact on the SMT solder-points. (While the original SMT resistor remained in place, unharmed for integrity of the original miner setup.) P.S. Hot-glue is also great to make prefab plastic parts from. Hot-glue guns are essentially mini-injection-extrusion devices, if you tune the heat. :P Nice explanation. Maybe a 3d printer would make miracles in your ideas. You don't have any S1? That is the reason for donating? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ISAWHIM on April 10, 2014, 12:14:43 PM Nice explanation. Maybe a 3d printer would make miracles in your ideas. You don't have any S1? That is the reason for donating? No, I do not have any S1's (If I did, I would have not asked for a donor-unit. I would have used one of my own.)... I was holding-out for the S2's for a bit, but have AMT's 1.2THs model in-transit. Will be doing some work for them, over the coming months. However, I do a lot of mods, to many things. This thread jumped at me. (Reminded me of the old AMD and PENTIUM mods, for unlocking chips and adjusting clock-speeds. Nice hacks! That and the old "graphite piano", circuit-bending tricks.) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on April 11, 2014, 12:17:50 AM Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jjiimm_64 on April 11, 2014, 01:03:14 AM TINY TINY TINY https://i.imgur.com/wLUxtsu.jpg OK, i give up.. what is that? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on April 11, 2014, 01:31:10 AM TINY TINY TINY https://i.imgur.com/wLUxtsu.jpg OK, i give up.. what is that? thats the size of the component you need to swap out if you want to change a resistor value without a pencil mod Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jjiimm_64 on April 11, 2014, 11:59:18 PM TINY TINY TINY https://i.imgur.com/wLUxtsu.jpg OK, i give up.. what is that? thats the size of the component you need to swap out if you want to change a resistor value without a pencil mod That is what I thought.... I had a hard enough time just hitting it with a pencil :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on April 12, 2014, 04:50:08 AM TINY TINY TINY https://i.imgur.com/wLUxtsu.jpg OK, i give up.. what is that? thats the size of the component you need to swap out if you want to change a resistor value without a pencil mod That is what I thought.... I had a hard enough time just hitting it with a pencil :) yeah my 57 year old eyes with 2x cataract operations an implanted lens in each eye. then I need reading glasses lots of light and I use this http://www.maxiaids.com/ProdImages/lg/5844.jpg so A 3b pencil and a quality meter is what I will do. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ernie- on April 14, 2014, 07:17:30 AM I did a mild under volt to try and kill some fan noise, 0.96v at 325Mhz gives me about 165GH/s and a much lower fan speed, 1980rpm. Penciled the resistance down to about 3.7k. On stock clock/volts I was getting 180GH/s at 390watts measured at the wall, I assume my Antec bronze 550watt PSU was chewing a fair bit of that. So down to 266watts at the wall, and only lost 15GH/s means a 32% power saving for 8.3% less hashing. Reasonably happy with that, with my high power costs it means more profit.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on April 16, 2014, 04:03:46 PM yep I still earn with the machines as is. but when diff pushes 25mill th this mod will let the machines earn until diff is about 45mill th. so maybe 30 or 40 extra days of profit
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on April 16, 2014, 09:33:21 PM Is it the same they will inject us under our skin? 8) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on April 18, 2014, 02:06:07 AM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: hchc on April 25, 2014, 01:10:59 AM Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer).
Or just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on April 25, 2014, 01:16:01 AM Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer). I meant to ask same questionOr just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Littleshop on April 25, 2014, 01:37:04 AM Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer). Or just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks. unfortunately all 8. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on April 30, 2014, 08:32:09 AM Brilliant!
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: krfighter on April 30, 2014, 08:42:47 PM thanks for the guide. Works perfectly!
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on May 02, 2014, 01:38:49 PM I don't think it's possible to break anything with this mod, but in case you break something, I'm not responsible Why undervolt the antminer s1 ? Because with default voltage (1.1v), the chip has a very bad efficiency What are the results ? I wanted to achieve 0.85v on the asic. ( you can go at 0.75v if you want and share the result) With this voltage my 3 antminer s1 are hashing at 140 GH/s each for 500 watts (166 watts per ant) (corsair AX1200i) [1.19W/gh at the wall] all my ants have less than 1 % of HW (0.95 0.5 0.3) What is needed ?
The following value works for an antminer with R3 resistor = 4.47 kOhms When adding pencil on R3, the result will be a lower voltage on the chip, so it's difficult to burn anything by doing it. Voltage :
Freq (275 MHz): edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' tips : 18Qauboa6wLq3pzzNWm8ppjSeHzqJEXRhb (BTC) F28JPPyP2iQT1BH6w8qYR79tGGzS54h5g8(HBN) WmUBNpvaaQk1a3hdfrkKgz8V6w9pjwvjYN(WDC) How did you achieve 140Gh/s with 0.85V? In the list you say at the 0.85V will do 2Gh/s per chip. So 64 chips X 2Gh/s makes 128 Gh/s. Do I miss something? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ernie- on May 02, 2014, 04:45:46 PM How did you achieve 140Gh/s with 0.85V? In the list you say at the 0.85V will do 2Gh/s per chip. So 64 chips X 2Gh/s makes 128 Gh/s. Do I miss something? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on May 02, 2014, 07:01:44 PM Ok.
But 0.85V is designed for 128Ghs, right? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: crazyates on May 02, 2014, 07:58:04 PM Ok. Technically, yes. He's running it slightly over the standard clock for that specific voltage.But 0.85V is designed for 128Ghs, right? Strictly speaking, a S1 is only "rated" for 350MHz @ the stock 1.1V, but we run all of ours at 393MHz. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: drukoz on May 07, 2014, 07:16:56 AM if i had 1 OC ant @ 400 in stock Volt and one UC ant @ 275 with a 2.7-3.0 kOhms would i be able to run it with a 750 watt PSU
the OC ant would be around 360-400 watts and the UC would be like 150-160 watts Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ernie- on May 07, 2014, 10:42:00 AM if i had 1 OC ant @ 400 in stock Volt and one UC ant @ 275 with a 2.7-3.0 kOhms would i be able to run it with a 750 watt PSU the OC ant would be around 360-400 watts and the UC would be like 150-160 watts The wattage rating of the PSU is not a reliable guide. You need to know how many 12volt circuits you have and what Amperage each circuit can provide. This has to be balanced across 4 x PCI-e 6pin connectors without overloading any one of the 12v circuits. An ant at 400Mhz is probably going to pull 17Amps per 12volt PCI-e connectors. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 10, 2014, 06:08:57 PM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300 did you ever get to this? I have 7 ants looking to down clock and down volt. I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now. I have another seasonic doing the other 2. I am at 1200gh and 2400 watts. 7 with your numbers would be 1050gh and 1400 watts Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on May 10, 2014, 07:24:02 PM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300 did you ever get to this? I have 7 ants looking to down clock and down volt. I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now. I have another seasonic doing the other 2. I am at 1200gh and 2400 watts. 7 with your numbers would be 1050gh and 1400 watts yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on May 10, 2014, 07:52:52 PM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300 did you ever get to this? I have 7 ants looking to down clock and down volt. I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now. I have another seasonic doing the other 2. I am at 1200gh and 2400 watts. 7 with your numbers would be 1050gh and 1400 watts yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it Nice!!! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bjalbert on May 10, 2014, 08:22:02 PM how do you get to .75v? Just add more graphite I would assume.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on May 10, 2014, 10:49:29 PM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300 did you ever get to this? I have 7 ants looking to down clock and down volt. I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now. I have another seasonic doing the other 2. I am at 1200gh and 2400 watts. 7 with your numbers would be 1050gh and 1400 watts yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it Nice!!! @philipma I'm actually at 1700ghs and 2200 watts, one more ant on the way this week cant beat .45 btc for this performance! Even sp cant touch it Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 11, 2014, 01:29:52 AM Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300 did you ever get to this? I have 7 ants looking to down clock and down volt. I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now. I have another seasonic doing the other 2. I am at 1200gh and 2400 watts. 7 with your numbers would be 1050gh and 1400 watts yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it Nice!!! @philipma I'm actually at 1700ghs and 2200 watts, one more ant on the way this week cant beat .45 btc for this performance! Even sp cant touch it That is impressive. I have everything ready to start, but they are still making money running 1.4th at 2800 watts. Getting too hot so I will need to change to the undervolt soon. I can not complain as they still make money overclocked until we get to 20 diff. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: helipotte on May 11, 2014, 02:05:34 AM All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants!
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: hashfun on May 11, 2014, 02:29:20 PM All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants! is this without hardware modification? what Avg speed u got @ 300Mhz Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: helipotte on May 11, 2014, 03:13:52 PM All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants! is this without hardware modification? what Avg speed u got @ 300Mhz This is achieved by "pencil modding" one of the feedback resistors and indicated in the beginning of this thread. I modded them from 4.7K to about 3.3K. This produced much lower power usage with acceptable errors (<2%). They average about 153Gh. Temps are MUCH more manageable now too. :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: hashfun on May 11, 2014, 03:19:39 PM All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants! is this without hardware modification? what Avg speed u got @ 300Mhz This is achieved by "pencil modding" one of the feedback resistors and indicated in the beginning of this thread. I modded them from 4.7K to about 3.3K. This produced much lower power usage with acceptable errors (<2%). They average about 153Gh. Temps are MUCH more manageable now too. :) Thank You For share your states.. but i dnt know how to mod so i test some without hardware modification and result are here 300Mhz = 1.2 AMP (270W) 0HW Error = 153 Gh 325Mhz = 1.3 AMP (292.5W) 0HW Error = 163 Gh 350Mhz = 1.4 AMP (315W) 0HW Error = 178 Gh 400Mhz = 1.7 AMP (382.5W) 0HW Error = 203 Gh BR Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: s1gs3gv on May 11, 2014, 04:55:09 PM Is R3 an 0805 sized component ?
ie: 0805 (2012 metric): 2.0 mm × 1.25 mm (0.079 in × 0.049 in) also see: http://en.wikipedia.org/wiki/Surface-mount_technology#Packages Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: drukoz on May 11, 2014, 11:24:41 PM https://i.imgur.com/99Fj9uj.png
the 2 @ 140 gh/s are both at 3.0- 2.9 Kohm @ 275 freq the other 2 @ 153-160 gh/s are both at 3.6-3.7 kohm @ 300 freq they're both using 750 watt PSU 1 @ 160ghs and 1 at 140ghs each psu they take 2.5 amps - 2.7 amps each PSU got 2 of them around 6 amps for 600 gh/s i was thinking about buying more ants and a better psu i dont like the PSUs that i have anyways Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: povlhp on May 12, 2014, 05:50:03 AM I have 1.5 Antminers.
One that always performced fine, and one that always performed badly, with the 2nd board shipped back after dying, and now supposedly lost in mail. The bad performing board is april 2014 issue. Got all 3 board modded to < 3kOhm, and Now I am running around 248 Watts for 210 GH/s (GHash.io average, 1 day). The single board is doing 65 GH/s, the fullminer is doing 145 GH/s. Both do have some HW errors, < 1%. So I am at < 1.2W/GHS. So even the relatively high power costs here allows me to make a profit for a few more weeks/months. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 12, 2014, 10:21:24 AM i might be undervoltng sooner than later - the results people are seeing is impressive. 75% speeds for 60% wattage
just holding out until for a few more weeks while the difficulty is low (11% jump = party) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: shamacala on May 13, 2014, 07:50:45 PM Hi Guys was wondering if someone could tell me where im going wrong? tried to undervolt all r3 resistors tonight but made no difference to ohms or volts, perhaps could i be using the wrong type of pecil (4hb i was using)
thanks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bjalbert on May 14, 2014, 02:47:22 AM Hi Guys was wondering if someone could tell me where im going wrong? tried to undervolt all r3 resistors tonight but made no difference to ohms or volts, perhaps could i be using the wrong type of pecil (4hb i was using) thanks 4HB should work fine. What exactly did you do and how many times did you trace it? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ernie- on May 14, 2014, 02:50:19 AM You have to rub the pencil across the resistor several times, make sure the pencil is sharp, and blow away any excess before you measure the resistance. Don't press real hard and dislodge the resistor.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Raptor2213 on May 14, 2014, 02:56:02 AM Watch this video and make certain that you are applying the pencil mod similar to how it is depicted in the video.
http://youtu.be/LNXSHpPACGs I've modded several of them so far with no issues. Likely you're modding the wrong resistor, or applying the pencil mod wrong. Remember, you need to mod 4 resistors per blade (total of 8). Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: shamacala on May 14, 2014, 07:18:32 AM Thanks, watched the video, is it a case of over the top of the resistor or around the side, also how many pencil strokes on all resistors.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Raptor2213 on May 14, 2014, 07:22:40 AM Thanks, watched the video, is it a case of over the top of the resistor or around the side, also how many pencil strokes on all resistors. On the edges, just like the video shows. As many as it takes to get the right resistance (use a meter). Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on May 14, 2014, 08:02:57 AM Anyone tried results bellow 1.19W/ghs undevolting?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: shamacala on May 14, 2014, 08:35:22 AM Thanks think thats what the problem may be, was doing it on top as i had read this somewhere else.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on May 14, 2014, 12:18:42 PM Anyone tried results bellow 1.19W/ghs undevolting? Yep345 watts for 3 antminers (113GH + 112GH +106GH) = 1.04 W/GH chip @~0.78 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on May 14, 2014, 12:21:29 PM Thanks!
HW errors??? Frequency? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on May 14, 2014, 12:47:54 PM Thanks! HW = 1.35% ,1.12% & 0.22%HW errors??? Frequency? Freq : option 'freq_value' '0881' option 'chip_freq' '225' option 'timeout' '45' Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 18, 2014, 05:20:41 AM I've been working on this right now as I'm completely out of electricity in my house right now. It's either turn things off or undervolt these guys so the option was kind of easy. Here are the results I've achieved so far with one out of four antminers. I'll keep this updated as I get the others setup as well.
Code: Completely Stock: As can be seen I was shooting for the OP's results out of this, but 275 gave massive amounts of HW errors. I was looking at the frequency formula and was having issues working it out. Could someone come up with a frequency table between 250 and 300 in small steps? Something along the lines of this, but for undervolted results would be excellent: 5e82 = 387.50 MHz 5f02 = 393.75 MHz 5f82 = 400.00 MHz 6002 = 406.25 MHz 6082 = 412.50 MHz Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 19, 2014, 03:15:10 AM Finished my other 3 antminers. I'm guessing the results on the first one were a bit of an oddity, but I'll try and work on that one a little later. More results:
Ant2 Code: Ant2 Ant3 Code: Ant3 (Repaired Capacitor) Ant4 Code: Ant4 I'd still like to see a 200-300 Frequency table with some different numbers in there. My first antminer runs with a super low HW error rate at 250, but horrible at 275, and I think I could bump it up a little bit. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on May 19, 2014, 03:13:08 PM I'm curious Beaflag... which of your ants have the 1200uf capacitors and which have the 1500uf caps?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: elaramus on May 19, 2014, 05:07:57 PM Finished my other 3 antminers. I'm guessing the results on the first one were a bit of an oddity, but I'll try and work on that one a little later. More results: Ant4 Code: Ant4 I'd still like to see a 200-300 Frequency table with some different numbers in there. My first antminer runs with a super low HW error rate at 250, but horrible at 275, and I think I could bump it up a little bit. Beaflag VonRathburg, excellent results and information. Instead of using the pencil-mod, I've chosen to add a 1/8w film resistor in parallel with the ones listed above. For instance adding a 10K ohm resistor creates a total resistance of 3.08k which drives the chips at .89v. But I too am seeing sporadic results with the hardware errors. I've ordered a number of other value film resistors from Mouser to play with this week (12K,14K,15K,16K,17K,18K,20K and 22K). I think the results you've posted for Antminer #4 are promising and that the chips enjoy being fed at least 1v. The point of all this blather is I was wondering if you could run ANT 4 specifically at 275 and 250MHZ and post the results? Code:
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: xray on May 19, 2014, 06:04:07 PM I have just ordered a multimeter, anyone got a link or video in detail to undervolt these ant s1, going to give it a go tomorrow
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on May 19, 2014, 06:21:13 PM Get ready for the surgery. ;D
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 20, 2014, 01:06:56 AM I'm curious Beaflag... which of your ants have the 1200uf capacitors and which have the 1500uf caps? All of them are 12/16/2013 1500uf units. Finished my other 3 antminers. I'm guessing the results on the first one were a bit of an oddity, but I'll try and work on that one a little later. More results: Ant4 I'd still like to see a 200-300 Frequency table with some different numbers in there. My first antminer runs with a super low HW error rate at 250, but horrible at 275, and I think I could bump it up a little bit. Beaflag VonRathburg, excellent results and information. Instead of using the pencil-mod, I've chosen to add a 1/8w film resistor in parallel with the ones listed above. For instance adding a 10K ohm resistor creates a total resistance of 3.08k which drives the chips at .89v. But I too am seeing sporadic results with the hardware errors. I've ordered a number of other value film resistors from Mouser to play with this week (12K,14K,15K,16K,17K,18K,20K and 22K). I think the results you've posted for Antminer #4 are promising and that the chips enjoy being fed at least 1v. The point of all this blather is I was wondering if you could run ANT 4 specifically at 275 and 250MHZ and post the results? Honestly, make things easy on yourself and just use the pencil. It doesn't cost anything and you can adjust the results with a swipe. Keep things simple. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: elaramus on May 20, 2014, 02:36:25 AM Honestly, make things easy on yourself and just use the pencil. It doesn't cost anything and you can adjust the results with a swipe. Keep things simple. Too late for that... resistors are already on the way. I have 30+ ants to do, and I'm faster with the iron than I am with the graphite... I was really curious about the power draw using 1v @ 250 and 275Mhz... for the others following this thread, I will post pics and results when I get my parts in later this week. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 20, 2014, 04:34:39 AM does the antminer S1 use cron/crontab?
It would be interesting to be able to set cron events to match time-of-use billing for electricity use. for example, if you pay more from 11am until 5pm: have crontab event start at 11am (convert the antminer to the right timezone or more simply do the math yourself and avoid changing fromt he shanghai timezone on every unit) change frequency to a lower value restart cgminer (just cgminer if possible rather than the entire antminer) at 5pm, have cron change the frequency back to the higher value once power is cheaper (and when you are less likely to be making your location even hotter than it is in summertime) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 20, 2014, 04:52:20 AM little bit of digging and my above post should be possible, but i need input from someone a bit more practiced in UNIX/cron
step 1: SSH and login (root/root) step 2: type "crontab -e" step 3: create this pair of new entries: Quote # reduce frequency at noon (00:00 default shanghai time) 0 0 * * 1-5 /vi /etc/config/asic-freq *specify line of code to edit* *reboot* # increase frequency at 5pm (05:00 default shanghai time) 0 5 * * 1-5 /vi /etc/config/asic-freq *specify line of code to edit* *reboot* cron reads itself every minute so this should work fine. My biggest issue is I have no idea how to gracefully merge the commands of editing specific lines in the asic-freq file and rebooting the miner afterwards Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on May 20, 2014, 06:02:50 AM 2 files :
asic-freq-high with high clock. asic-freq-low with low clock Quote # reduce frequency at noon (00:00 default shanghai time) 0 0 * * 1-5 cd /etc/config && cp asic-freq-low asic-freq && reboot # increase frequency at 5pm (05:00 default shanghai time) 0 5 * * 1-5 cd /etc/config && cp asic-freq-high asic-freq && reboot Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 20, 2014, 01:06:21 PM 2 files : asic-freq-high with high clock. asic-freq-low with low clock Quote # reduce frequency at noon (00:00 default shanghai time) 0 0 * * 1-5 cd /etc/config && cp asic-freq-low asic-freq && reboot # increase frequency at 5pm (05:00 default shanghai time) 0 5 * * 1-5 cd /etc/config && cp asic-freq-high asic-freq && reboot thank you :) I just set this up on one of my miners to run noon->5pm at lower speed to see how it works out. if all goes well this would pair nicely with a voltage mod to use the least power when TOU is $0.12/kwh and maximum speeds when it is only $0.07/kwh Is there any easy way to modify files for this (the two asic-freq files and crontab) on all my miners simultaneously? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jwcastle on May 20, 2014, 01:21:25 PM Excellent article! I under-volted my S1 following your directions. Although I do have a volt meter, I found it very difficult to get proper measurements because the resistors are so tiny. In the end I just rubbed some pencil graphite from any pencil (not HB). So I have no idea what the resistance is or the voltage at the two locations.
Then I looked at the status screen and everything looked ok. Look at the average GH/s & HW on the screen shot. And it's pulling 201-watts at the wall. http://i3.photobucket.com/albums/y61/tsa702/miner.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: vodic62 on May 20, 2014, 05:47:49 PM Is there any easy way to modify files for this (the two asic-freq files and crontab) on all my miners simultaneously? Simultaneously not, but there is faster way then edit everything again and again. You can copy files directly from one antminer to another. For example: Code: scp /etc/config/asic-freq-high 192.168.something.something:/etc/config Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 20, 2014, 06:46:40 PM Rough numbers!
By dropping your 200Gh down to 115Gh for the 6hrs (11am-5pm) saves $0.32 day or $9.60 mth in electric costs BUT you lose 0.001225BTC per day worth ~$0.55 or $16.50 mth with BTC at $450.00 Is it worth it? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 20, 2014, 10:36:55 PM Rough numbers! By dropping your 200Gh down to 115Gh for the 6hrs (11am-5pm) saves $0.32 day or $9.60 mth in electric costs BUT you lose 0.001225BTC per day worth ~$0.55 or $16.50 mth with BTC at $450.00 Is it worth it? IMO, not *yet*. I plan to undervolt starting late next month unless the BTC/USD ratio keeps climbing. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 20, 2014, 10:41:06 PM Is there any easy way to modify files for this (the two asic-freq files and crontab) on all my miners simultaneously? Simultaneously not, but there is faster way then edit everything again and again. You can copy files directly from one antminer to another. For example: Code: scp /etc/config/asic-freq-high 192.168.something.something:/etc/config I imagine I would do this from the SSH (putty) instance on the machine that i have modified already? ie: Code: scp /etc/config/asic-freq-high 192.168.1.201:/etc/config I imagine that it the crontab copy method will not work like this though? is it possible to do something like this to have it operate to all IP addresses with antminer units (and is a user/pass not needed for each?)?: Code: scp /etc/config/asic-freq-high 192.168.1.201-192.168.1.220:/etc/config Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: vodic62 on May 21, 2014, 06:56:39 PM I imagine I would do this from the SSH (putty) instance on the machine that i have modified already? ie: Code: scp /etc/config/asic-freq-high 192.168.1.201:/etc/config I imagine that it the crontab copy method will not work like this though? is it possible to do something like this to have it operate to all IP addresses with antminer units (and is a user/pass not needed for each?)?: Code: scp /etc/config/asic-freq-high 192.168.1.201-192.168.1.220:/etc/config You can optimize little bit, but it's not possible to make it for every antminer at once. Not without certificates and scripting. Code: scp /etc/config/asic-freq-* 192.168.1.201:/etc/config Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: rograz on May 22, 2014, 12:30:23 PM The Swedish summer has betrayed me (27C atm, last summer it never went above 23C!) might end up undervolting sooner than I had anticipated. What's the lowest possible voltage you can get btw?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Gologuzan on May 22, 2014, 02:56:46 PM can anyone help me?
i need values for those but to make s1 to spend around 300-330w option 'freq_value' ' ' option 'chip_freq' ' ' option 'timeout' ' ' is it possible? thx. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 22, 2014, 04:44:02 PM I just did my very first under volt under clock.
I have a good multi meter all resistors read 4.46 or 4.47 to start. adding graphite is not exact and I had variance from 2.81 to 3.42 2 machines so 16 resistors. one machine does not like running at freq 300 it had 20 percent error rate. so I dropped it to freq 275 these two machines with just under clock to 300 each pulled 616 watts. and hashed at 305gh once I did both under volt and under clock I am now hashing at 295gh with 399 watts at over clock of 393 I had 398gh at 818 watts. http://imagizer.imageshack.us/v2/1600x1200q90/839/zbnf.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: wpgdeez on May 22, 2014, 04:48:12 PM Nice results!
I just did my very first under volt under clock. I have a good multi meter all resistors read 4.46 or 4.47 to start. adding graphite is not exact and I had variance from 2.81 to 3.42 2 machines so 16 resistors. one machine does not like running at freq 300 it had 20 percent error rate. so I dropped it to freq 275 these two machines with just under clock to 300 each pulled 616 watts. and hashed at 305gh once I did both under volt and under clock I am now hashing at 295gh with 410 watts at over clock of 393 I had 398gh at 818 watts. http://imagizer.imageshack.us/v2/1600x1200q90/839/zbnf.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on May 22, 2014, 04:50:49 PM I just did my very first under volt under clock. I have a good multi meter all resistors read 4.46 or 4.47 to start. adding graphite is not exact and I had variance from 2.81 to 3.42 2 machines so 16 resistors. one machine does not like running at freq 300 it had 20 percent error rate. so I dropped it to freq 275 these two machines with just under clock to 300 each pulled 616 watts. and hashed at 305gh once I did both under volt and under clock I am now hashing at 295gh with 399 watts at over clock of 393 I had 398gh at 818 watts. http://imagize[Suspicious link removed]ageshack.us/v2/1600x1200q90/839/zbnf.png To run at 300 with little error you have to make sure you get 3.4 - 3.5kohm, that will give you 153 - 155ghs per ant at about 210 watts I currently have 2.15 Ths at under 3kw at the wall, only 4 power supplies :) 3 x 850, 1 x 1300 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 22, 2014, 08:28:56 PM If you're going to do this and read the resistance values please post the voltage readings you have for the units under load as well. It is rather straight forward and makes a lot more sense as even at the same resistance values the voltage can vary. Everyone is used to seeing the correlation between XYZ frequency and 1.abc voltage.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 22, 2014, 09:08:19 PM thanks I just carried the 2 of them to my buddies office and we have 300gh at free power. but pulling 400 watts.
we can do up to 800 free watts as per his leasing contract. so by next week 4 s-1's running at 600gh 800 watts and the watts are free! to beaflag will do so on the next 2. If you're going to do this and read the resistance values please post the voltage readings you have for the units under load as well. It is rather straight forward and makes a lot more sense as even at the same resistance values the voltage can vary. Everyone is used to seeing the correlation between XYZ frequency and 1.abc voltage. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on May 23, 2014, 06:53:12 AM If you're going to do this and read the resistance values please post the voltage readings you have for the units under load as well. It is rather straight forward and makes a lot more sense as even at the same resistance values the voltage can vary. Everyone is used to seeing the correlation between XYZ frequency and 1.abc voltage. voltage under load = .875 - .91 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Bitcoin++ on May 25, 2014, 10:28:04 AM Here's a closeup of my Antminer.
http://imgur.com/SglhzeV As I've understood the R66 transistor is where I should add pencil graphite (and there are 16 of these albeit with different numbers). It has kind of two blank edges and the middle is matte dark gray. Does it matter where I apply the graphite? What happens if I apply too much? Will only the HW error increase, or can the hardware get permanent damage? What happens if I don't apply enough? It should be applied when the miner is off, right? Should I do all 16 at the same time? Is it necessary to use a voltmeter? Can the measure be made when the antminer is off? If I don't use the meter, is there another way to determine if the adequate amount of graphite has been applied? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Raptor2213 on May 25, 2014, 01:08:09 PM Here's a closeup of my Antminer. http://imgur.com/SglhzeV 1 - As I've understood the R66 transistor is where I should add pencil graphite (and there are 16 of these albeit with different numbers). 2 - It has kind of two blank edges and the middle is matte dark gray. Does it matter where I apply the graphite? 3 - What happens if I apply too much? Will only the HW error increase, or can the hardware get permanent damage? 4 - What happens if I don't apply enough? 5 - It should be applied when the miner is off, right? Should I do all 16 at the same time? 6 - Is it necessary to use a voltmeter? Can the measure be made when the antminer is off? If I don't use the meter, is there another way to determine if the adequate amount of graphite has been applied? 1 - Yes 2 - Not really - so long as you join the two ends. 3 - You erase and try again. 4 - You put more on. 5 - Yes 6 - Absolutely. It is impossible to apply this mod without a voltmeter. You can measure the ohms when the miner is off to determine if you put on enough or too much. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 25, 2014, 02:58:04 PM Here's a closeup of my Antminer. http://imgur.com/SglhzeV 1 - As I've understood the R66 transistor is where I should add pencil graphite (and there are 16 of these albeit with different numbers). 2 - It has kind of two blank edges and the middle is matte dark gray. Does it matter where I apply the graphite? 3 - What happens if I apply too much? Will only the HW error increase, or can the hardware get permanent damage? 4 - What happens if I don't apply enough? 5 - It should be applied when the miner is off, right? Should I do all 16 at the same time? 6 - Is it necessary to use a voltmeter? Can the measure be made when the antminer is off? If I don't use the meter, is there another way to determine if the adequate amount of graphite has been applied? 1 - Yes 2 - Not really - so long as you join the two ends. 3 - You erase and try again. 4 - You put more on. 5 - Yes 6 - Absolutely. It is impossible to apply this mod without a voltmeter. You can measure the ohms when the miner is off to determine if you put on enough or too much. to clarify number 6: a multimeter is used to check the resistance (3.4-3.5 Kohm). Measure after each pencil mod. checking the voltage isnt *really* needed for each chip secton - if all the resistances are the same checking the voltage in one section should mean all the other sections are the same voltage. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: basil3legs on May 25, 2014, 10:09:44 PM Just gave this a go.
I reduced the resistances to between 2920 and 2950 and the chip voltage range is now between 855mV and 870mV, so pretty consistent although I only measured the top four on each board. Having set the frequency to 275MHz I am getting around 0.25% errors (although this appears to be slowly creeping up) and my meter is showing 180W (240V). With the sudden increase in the price of Bitcoin I calculate I am losing around 5% of my income after allowing for the cost of the electric which is pretty good and that will decrease should the price go down again (or when the difficulty goes up next). The plus side is a reduction of around 10C in chip temperature and it is a lot quieter. Now to decide which other ones to do as that S2 would only really run at 375MHz anyway, although at that speed there were little to no errors, any quicker and they really racked up! I have another one that only likes 375MHz and gives a few more errors so might as well do that one as well! Thanks for the research on this guys. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 26, 2014, 01:31:44 AM here is one photo 4 resistors on each side 8 per miner.
http://imagizer.imageshack.us/v2/1280x1024q90/844/ifoj.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Hqen2000 on May 26, 2014, 07:52:57 PM I just set my 3 miners all to 3.4-3.5 ohms.. 300mhz, the load went from 1028watts, down to 690watts. Same exact hash rate. I was running 300mhz prior due to heat issues. So now I am saving 338watts with zero penalty!!! And they are sooooo quiet now!
The difference in heat output is huge. I'm also buying molex adapters to power all 3 miners from a single 850watt power supply. I'll probably get down to about 650watts to power 3 miners all hashing at 155. All watts are measured at the wall. Looking at cost: $2250 S2 1100watts / 1000g/h ~$290 (depending on power supply, etc.) S1 230watts / 155g/h 7x S1 1085g/h 1610watts $2,030 You could probably get that 2,030 down to 1800 or so if you were very cost effective on the power supplies and buying the miners. But the S2's value is pretty good. Especially since you are talking about about 500 additional watts from the S1. I think the S2 is slowly starting to become a better value. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: crazyearner on May 27, 2014, 12:47:02 AM Has anyone done this to get 200GH per ant 100GH per blade etc with reduced voltage. So less voltage more GH am thinking to do but just checking here first to see if anyone's managed to reduce the voltage and have a good hash speed
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 27, 2014, 01:51:01 AM Has anyone done this to get 200GH per ant 100GH per blade etc with reduced voltage. So less voltage more GH am thinking to do but just checking here first to see if anyone's managed to reduce the voltage and have a good hash speed Imo the 150GH/210W target is pretty ideal. Good payoff between time spent modding and the power savings. If you did 180GH/300W you would find yourself re-modding a few weeks later. (that said, 3.9-4.0 kohm might give 180GH / 300W if you are lucky) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: DimensionsOfHell on May 28, 2014, 03:19:27 AM Is there any way to have the fans always at 100%? I want to reduce the heat as much as possible. Summer here in FL gets pretty hot, and the temp in my miner room is 98F right now, and its only going to get hotter.
I've got 16 AntMiner S1's, 2 Dragon 1T miners, and 1 KNC Saturn with 3 boards. If I can get the Ants to drop some massive temp, I could add 1 or 2 S2's. I'm out of power & have excessive heat. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 28, 2014, 03:47:42 AM Is there any way to have the fans always at 100%? I want to reduce the heat as much as possible. Summer here in FL gets pretty hot, and the temp in my miner room is 98F right now, and its only going to get hotter. I've got 16 AntMiner S1's, 2 Dragon 1T miners, and 1 KNC Saturn with 3 boards. If I can get the Ants to drop some massive temp, I could add 1 or 2 S2's. I'm out of power & have excessive heat. you need to add really good pull fans. I posted some shots of them and where I got them on ebay. add these and vent the heat out of the room http://www.ebay.com/itm/151276722479?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 he sold me 14 at 107 I will find the hook up photos I used 4 pipe cleaners to attached the fan on the pull side. http://imagizer.imageshack.us/v2/1600x1200q90/834/pzgm.jpg see the fan pipe cleaners and nylon nuts for spacing http://imagizer.imageshack.us/v2/1600x1200q90/841/pfg1.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 28, 2014, 04:04:22 AM Is there any way to have the fans always at 100%? I want to reduce the heat as much as possible. Summer here in FL gets pretty hot, and the temp in my miner room is 98F right now, and its only going to get hotter. I've got 16 AntMiner S1's, 2 Dragon 1T miners, and 1 KNC Saturn with 3 boards. If I can get the Ants to drop some massive temp, I could add 1 or 2 S2's. I'm out of power & have excessive heat. I'm at 106* right now with both sides open and 3x 500cfm duct fans running. I understand completely. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on May 28, 2014, 04:06:17 AM I was noticing that the hashrate for my antminers had been dropping off. Logged into them and noticed they had some pretty high error rates:
18 Hours 30 Minutes Ant1 275 = 12.763361189114817696879475815092 Ant2 250 = 0.10015846041845231355797176812215 Ant3 325 = 4.4344988816100151774557453763173 Ant4 275 = 8.9107904850450710092977864238739 Pulled them onto my test bench to remeasure resistance values to see if it had changed any. Sure enough all of the miners, but one had massive resistance drops. Used a pencil to readjust them back to nominal and things are running properly again. Ant1 Code: 2.675 kOhms .802v top / .802v bottom Ant2 Code: No issues Ant3 Code: 3.640 Ant4 Code: 2.670 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 28, 2014, 10:21:39 AM I was noticing that the hashrate for my antminers had been dropping off. Logged into them and noticed they had some pretty high error rates: 18 Hours 30 Minutes Ant1 275 = 12.763361189114817696879475815092 Ant2 250 = 0.10015846041845231355797176812215 Ant3 325 = 4.4344988816100151774557453763173 Ant4 275 = 8.9107904850450710092977864238739 Pulled them onto my test bench to remeasure resistance values to see if it had changed any. Sure enough all of the miners, but one had massive resistance drops. Used a pencil to readjust them back to nominal and things are running properly again. Ant1 Code: 2.675 kOhms .802v top / .802v bottom Ant2 Code: No issues Ant3 Code: 3.640 Ant4 Code: 2.670 pencil mods have a tendency to 'bake in'. Within the first 24 hours the resistance may drop slightly and thus the voltage may slip below what worked at first Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: DimensionsOfHell on May 28, 2014, 07:32:57 PM ...... I actually have all my ants on a push-pull configuration. I have some Rosewell fans on them (Was on sale for $5 with free shipping) http://www.amazon.com/gp/product/B003WM184A/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1 which isn't as high as the ones you've linked to, but its not that bad. It's about 75CFM. I just took out two of the screws from the original fan (one from bottom left side of the fan, and one from top right side of the fan), and used it on the new front fans (top left/bottom right I think. You can't use the long screws on one side due to a capacitor blocking the way). Two screws is more then enough to hold them in place, and that way you don't have to use the pipe cleaners, and no extra money spent. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 28, 2014, 07:49:46 PM ...... I actually have all my ants on a push-pull configuration. I have some Rosewell fans on them (Was on sale for $5 with free shipping) http://www.amazon.com/gp/product/B003WM184A/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1 which isn't as high as the ones you've linked to, but its not that bad. It's about 75CFM. I just took out two of the screws from the original fan (one from bottom left side of the fan, and one from top right side of the fan), and used it on the new front fans (top left/bottom right I think. You can't use the long screws on one side due to a capacitor blocking the way). Two screws is more then enough to hold them in place, and that way you don't have to use the pipe cleaners, and no extra money spent. that does not work for the fans i linked they are 38mm just like the stock push fan. they move 160 cfm. if you put them in with the screws you mention the blades do not clear the assembly nuts on the heat sinks. my 4 pipe cleaners allowed for the spacers and let the fast fans blades work. your idea does work if the fan blades clear the heat sink nuts. the pipe cleaners cost be 99 cents for 50. i had the nylon spacers. if you are in the usa i can mail you one to see if it is better then your fans. it fits in a padded flat rate envelope. cost 6 bucks to ship. i have extra. so i would send it for the shipping fee. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: BITMAIN on May 30, 2014, 08:59:40 AM This guideline is for under clocking modification to get 1W/GH/s. In order to get 1W/GH/s, you shall modify the hardware and software.
1 Hardware Modification 1.1 Resistor Typical Value Package Type: 0603 https://i.imgur.com/tWNCiCJ.jpg 1.2 Power Consumption and Hash Rate https://i.imgur.com/Pnx1IFB.jpg 1.3 How To Modify Step 1: Remove the existing components: R3, R66, R38, R52. Step 2: Refer to Resistor Typical Value to replace the R3, R66, R38, R52. Step 3: Clear the excess of rosin and solder tin slag around resistors. 1.4 Refer to below locations to do modification https://i.imgur.com/5Vui1Y0.jpg 2 Software Modification 2.1 Connection Miner Though SSH protocol on your PC to connect S1, user name and password are ‘root’ by default. Then modify ‘freq_value’, ‘chip_freq’ and ‘timeout’ in the etc/config/asic-freq file. 2.2 Modification Value 2.2.1 200M*8*32*2 = 102.4GHash: Code: option 'freq_value' '0781' #200M Code: option 'freq_value' '0881' #225M Power off and restart Miner, check the configuration via Web GUI ‘Miner Status’. If the Miner doesn’t work normally, please double confirm the correction of frequency configuration file. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sebdude420 on May 30, 2014, 10:21:20 AM Thank you Bitmain for releasing some good values to work on!
I'm going to get this done ony remaining S1s Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: allcoinminer on May 30, 2014, 10:40:47 AM This guideline is for under clocking modification to get 1W/GH/s. In order to get 1W/GH/s, you shall modify the hardware and software. 1 Hardware Modification 1.1 Resistor Typical Value Package Type: 0603 https://i.imgur.com/tWNCiCJ.jpg 1.2 Power Consumption and Hash Rate https://i.imgur.com/Pnx1IFB.jpg 1.3 How To Modify Step 1: Remove the existing components: R3, R66, R38, R52. Step 2: Refer to Resistor Typical Value to replace the R3, R66, R38, R52. Step 3: Clear the excess of rosin and solder tin slag around resistors. 1.4 Refer to below locations to do modification https://i.imgur.com/5Vui1Y0.jpg 2 Software Modification 2.1 Connection Miner Though SSH protocol on your PC to connect S1, user name and password are ‘root’ by default. Then modify ‘freq_value’, ‘chip_freq’ and ‘timeout’ in the etc/config/asic-freq file. 2.2 Modification Value 2.2.1 200M*8*32*2 = 102.4GHash: Code: option 'freq_value' '0781' #200M Code: option 'freq_value' '0881' #225M Power off and restart Miner, check the configuration via Web GUI ‘Miner Status’. If the Miner doesn’t work normally, please double confirm the correction of frequency configuration file. Yummy need to know the Power@Walls. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: allcoinminer on May 30, 2014, 10:50:42 AM Thank you Bitmain for releasing some good values to work on! I'm going to get this done ony remaining S1s Can't wait to see your output. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 30, 2014, 10:52:21 AM they could put the resistors in and sell the modded ones as s-1A's
low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 30, 2014, 10:58:38 AM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: allcoinminer on May 30, 2014, 11:09:02 AM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 30, 2014, 11:27:16 AM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement. depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency. I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times... Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 30, 2014, 10:37:48 PM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement. depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency. I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times... well if coins creep past 700 usd undervolting gets put off a month. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: allcoinminer on May 30, 2014, 10:41:17 PM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement. depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency. I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times... @628 and higher prize will keep us from doing the mod. Let it continue. Atlast I will put a pot. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: DimensionsOfHell on May 30, 2014, 10:46:54 PM they could put the resistors in and sell the modded ones as s-1A's low power model. better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement. depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency. I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times... well if coins creep past 700 usd undervolting gets put off a month. I'm in the same boat with you. Hopefully the price keeps going up, then I won't have to worry about undervolting for awhile more. The only reason I wanted was so that I could add more hardware, but if the price keeps going up, I won't have to worry about adding new hardware for another month or two. Oh in ref to the fan I was mentioning earlier; I forgot to mention that I put in a little dab of hot glue on the frame where the fan would be, that gives it a bit of a gap (basically using it as spacers) so I can use the two screws I took off the original fan, that way I avoid the fan blades hitting the little screws there are there. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 12:21:14 AM Added link to my pictures of the 10k pot addition to S1's. http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) https://i.imgur.com/bRgcnZT.jpg It would be best if you are going to just change out the resistor to put in a 10K pots! Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 02:13:00 AM Added link to my pictures of the 10k pot addition to S1's. http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) https://i.imgur.com/bRgcnZT.jpg It would be best if you are going to just change out the resistor to put in a 10K pots! Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes. You could do a side business s-1 mods. you need coins to drift upwards at the correct pace. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on May 31, 2014, 02:28:58 AM Added link to my pictures of the 10k pot addition to S1's. http://imgur.com/a/8SUO8 (http://imgur.com/a/8SUO8) https://i.imgur.com/bRgcnZT.jpg It would be best if you are going to just change out the resistor to put in a 10K pots! Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes. Even with the price rising I'm going to do the pots... In my case I'm going to throw 5K pots on... I just don't have to turn them down right away ;D Thanks Trend for the pics! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 12:52:12 PM According to Bitmain their chip voltage range is 0.75V to 1.20V.
To achieve this range you need ~3.2 ohms to ~9.7 ohms (I don't have my calc's with me but these values are very close) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on May 31, 2014, 03:23:41 PM Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range ;D
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 05:23:25 PM Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range ;D or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages? 0k to 5k pot is common to find. my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling. while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine. I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option. 2.5k would prevent too low and 5k would prevent too high Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Biodom on May 31, 2014, 05:41:00 PM Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range ;D or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages? 0k to 5k pot is common to find. my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling. while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine. I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option. 2.5k would prevent too low and 5k would prevent too high I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 06:12:35 PM If you ever wanted to get back to "stock 180GH" your pot would have to go up to 8.2Kohms which puts you at 1.12 -1.13 V at the chip.
5K ohm will only get you up to 0.9 to 0.92 V at the chip. 0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea If you're going to play, play right. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 06:24:46 PM Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range ;D or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages? 0k to 5k pot is common to find. my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling. while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine. I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option. 2.5k would prevent too low and 5k would prevent too high How are you going to achieve 220gh at 450- 460 watts with a 5K pot or resistor? The stock R3, 66, 38, 52 resistors are 8.2K which give a voltage of 1.12-1.13VDD at the chip (check the S1 schematics or the BOM). Turn the pencil you used for the pencil mods around and use the rubber to erase your calculations Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: stevehoppy on May 31, 2014, 06:27:08 PM Wish I had a clue about any of this to be honest.
I've read this thread in full now and my head is spinning!! I have NEVER done any electrical work or soldering - does anyone here live in the UK and fancy doing this for me in exchange for a few £'s lol? Posted from Bitcointa.lk - #IA5nM31NyUvnqb8h Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 06:35:27 PM I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks [/quote] Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on May 31, 2014, 06:57:41 PM Trends.. I think I understand what you are saying.... When I measure the R3, etc resistor on my ant I see a value of 4.47K... duh.. it's in circuit... I'm yet again a dumbass.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on May 31, 2014, 07:06:48 PM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 07:12:44 PM If you ever wanted to get back to "stock 180GH" your pot would have to go up to 8.2Kohms which puts you at 1.12 -1.13 V at the chip. 5K ohm will only get you up to 0.9 to 0.92 V at the chip. 0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea If you're going to play, play right. my oem resistors were all 4.46k so a 5k pot should work Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on May 31, 2014, 07:17:06 PM If you ever wanted to get back to "stock 180GH" your pot would have to go up to 8.2Kohms which puts you at 1.12 -1.13 V at the chip. 5K ohm will only get you up to 0.9 to 0.92 V at the chip. 0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea If you're going to play, play right. my oem resistors were all 4.46k so a 5k pot should work I'm thinking that they measure ~4.47K in circuit... but that may be a false reading without measuring the resistor out of the circuit. I'll find out when my pots come in... I have both 5K and 10K coming ;D Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 07:20:21 PM If you ever wanted to get back to "stock 180GH" your pot would have to go up to 8.2Kohms which puts you at 1.12 -1.13 V at the chip. 5K ohm will only get you up to 0.9 to 0.92 V at the chip. 0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea If you're going to play, play right. my oem resistors were all 4.46k so a 5k pot should work I'm afraid you are wrong, you must be measuring on the board in circuit. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on May 31, 2014, 07:21:38 PM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Agreed, but not as much fun!! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Biodom on May 31, 2014, 08:11:16 PM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 08:13:28 PM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? my pencil mod is 11 days old 3 ants do 430gh at 563 watts. rock solid for 11 days. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Biodom on May 31, 2014, 08:13:51 PM Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends Where do you buy these POTs? thanks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 08:18:20 PM I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends Where do you buy these POTs? thanks [/quote] mouser/newark/jameco a few others. Since I may be wrong about the 5k the 10k pot may be better here is a link for a low cost 10k pot http://www.mouser.com/ProductDetail/Bourns/3306F-1-103/?qs=sGAEpiMZZMtC25l1F4XBU9QhtPcWQTANAkX0QUL%2f5Dw%3d please check with others but I think this is good. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: uberdag on May 31, 2014, 09:48:29 PM Do we not need to get certain wattage rating for the resistors as well as ohm?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on May 31, 2014, 10:00:32 PM Do we not need to get certain wattage rating for the resistors as well as ohm? yes we do. but the oem resistor was 4.47k in circuit and i think 8.3 k pulled if so it had a low watt rating due to its size. these are close to the size and quality of the stock resistor they don't handle much power. http://www.ebay.com/itm/8-2K-OHM-SMD-1206-Resistor-5000PCS-One-Roll-New-RoHS-/200999285608?pt=LH_DefaultDomain_0&hash=item2ecc7db368 items that small simply can not handle much in terms of watts. on the ebay link the most any of those resistors need handle = 1/4 watt the ones on the antminer are most likely 1/4 watt or less. I am not the best authority wait for more confirmation on the correct pot to use Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: uberdag on May 31, 2014, 10:13:58 PM figure they are low but sure dont wannt get the wrong ones... blew a monitor i was working on when i forgot that resisters in series need to add the wattage up... well didnt so much blow it up as melt some things
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on June 01, 2014, 12:32:30 AM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? my pencil mod is 11 days old 3 ants do 430gh at 563 watts. rock solid for 11 days. Pencil mod has been working great for me http://s30.postimg.org/tcxxkgyw1/am15.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on June 01, 2014, 12:41:28 AM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? pencil mod is very stable. just remember that over the first day or two of operation the graphite is baked with heat and oxidized, and becomes *slightly* less resitive, lowering unit voltage so that clockspeed might need to tune down ~12MHz after 24hrs to remain stable. 90% of the time you wont notice unless you were finely tuning the clock to start with. i would not suggest the actual resitor swapping with an iron to anyone but a pro - if you are not sure if you can do it with the tools you have - theres a huge chance youll end up desoldering nearby components and going in to a proper repair shop monday so a pro can fix your mistakes / burn marks. I personally like tinkering with solder as much as the next guy, but these itty-bitty SMD resistors require a lot of precision Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on June 01, 2014, 01:17:27 AM I agree 100% with klondike_bar, if your'e not sure don't try this mod, use the pencil method.
grn looks like you have found every block in the last 5 days based on your Ant Monitor unless the block column means something else! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Biodom on June 01, 2014, 01:45:40 AM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? my pencil mod is 11 days old 3 ants do 430gh at 563 watts. rock solid for 11 days. Pencil mod has been working great for me http://s30.postimg.org/tcxxkgyw1/am15.jpg Ok, thanks, I think I got it. Will try pencil first. The R3 and other resistors are so tiny, I will mess them up with the iron for sure. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 01, 2014, 02:06:06 AM Quote I have never done anything like this, so a few questions from a newb: 1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what? 2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was? Thanks Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash). Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes! Trends just do a pencil mod. its easy enough that anyone can do it. All you need is a pencil and a multimeter, and about 10-15 minutes per antminer. (a 4B pencil is a bit easier to work with than a 2B/HB since its softer lead). Its not as precise a method as actually soldering a new resistor, but its ~95% as effective and far faster and less likely to do permentant amage then using a soldering iron to remove/replace a SMALL resistor Is pencil mod even stable or you have to constantly monitor the ant's power usage/HW mistakes and re-mod every week or two? my pencil mod is 11 days old 3 ants do 430gh at 563 watts. rock solid for 11 days. Pencil mod has been working great for me http://s30.postimg.org/tcxxkgyw1/am15.jpg Ok, thanks, I think I got it. Will try pencil first. The R3 and other resistors are so tiny, I will mess them up with the iron for sure. yeah smd resistors are hard to do. I am 57, but my eyes are older I have had cataract surgery in each one. I can see far in one I can see medium in the other, but close meh so so at best. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on June 01, 2014, 10:10:17 PM I agree 100% with klondike_bar, if your'e not sure don't try this mod, use the pencil method. grn looks like you have found every block in the last 5 days based on your Ant Monitor unless the block column means something else! yes the block column is correct all my ants are load balanced I solo mine with 1 of them plus I mine alt coins when profitable. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: davecoin on June 05, 2014, 05:01:15 AM Just wanted to say thanks to OP and others here. I have 3 ants running at 541 watts on a DELL 750 watt server PSU. All are running ~140Gh/s with <0.5% errors. I used the pencil method and a cheap multimeter.
-Dave Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: tzortz on June 05, 2014, 10:48:49 PM So, whats your total hashing now?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/gh at the wall] Post by: WinterParker on June 06, 2014, 07:22:06 AM nice job! however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus If you have no more space, no more power and the room is getting too hot, this is helpful. check, check, & check..... undervolting it is! so I can stop blowing breakers over here.. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on June 06, 2014, 05:42:28 PM @Trends The 10k pots work great!
Chips are at .91v Frequency 300mhz Hashrate 153gh (<.5% HW) Wattage 216w at the wall Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on June 06, 2014, 06:57:14 PM If you have the skills it's the best way to go.
Congrat's. Got pic's? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: marunga on June 06, 2014, 07:00:46 PM Hi,
I suggest multi turn pots. Glue them with double-sided tape near the orange caps and use pcb jumper wire to connect to the resistors (the type of wire used to repair PCB tracks). The potentiometer in the picture is not soldered to the resistor, but you get the idea... http://31.media.tumblr.com/ca128cd98d3d84d9ff29d52efc6fc045/tumblr_n6yhjviglj1sepsqdo1_1280.jpg rgds, m Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on June 09, 2014, 03:51:52 PM If you have the skills it's the best way to go. Congrat's. Got pic's? Sure do! sorry for the bad pic, I put it into service immediately ;D Hot melt glue, 10K pots, works great! http://i62.tinypic.com/2yl7cly.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: wpgdeez on June 09, 2014, 04:30:00 PM If you have the skills it's the best way to go. Congrat's. Got pic's? Sure do! sorry for the bad pic, I put it into service immediately ;D Hot melt glue, 10K pots, works great! http://i62.tinypic.com/2yl7cly.jpg So you used a glue gun instead of solder? How much do the pots cost? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on June 09, 2014, 04:46:17 PM If you have the skills it's the best way to go. Congrat's. Got pic's? Sure do! sorry for the bad pic, I put it into service immediately ;D Hot melt glue, 10K pots, works great! http://i62.tinypic.com/2yl7cly.jpg So you used a glue gun instead of solder? How much do the pots cost? No. The hotmelt glue was for the pots and wires... standard solder used for the wire connections. Pots were 50 for $17.20 shipped via ebay. You can get them cheaper from china but I got them in 2 days from a US seller. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jwcastle on June 15, 2014, 11:19:26 AM Thank you VERY much for the helpful tutorial. During the summer months when the temperature is high, I like to lower the hash rate slightly. Combining that with undervolt method makes my rigs run much cooler. All of my rigs are running at ~130GH/s with each drawing ~170 watts at the wall.
Cheers! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 15, 2014, 11:33:58 AM MY 3 are doing 420 gh pulling 560 watts at the plug.
so that is 1.33 watts a hash at the wall…… stable being doing it for about 1 month. 1)low errors 2)low noise 3)low heat Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: leptar on June 15, 2014, 04:21:26 PM Question for those that know...
when using potentiometers, besides the 10k adjustable value what else should we be looking at? I am seeing huge fluctuations regarding wattage ratings from .08w to .3w... 26 or 28 AWG tinned plated stranded wire should be sufficient.. TIA. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 17, 2014, 01:28:55 AM Question for those that know... when using potentiometers, besides the 10k adjustable value what else should we be looking at? I am seeing huge fluctuations regarding wattage ratings from .08w to .3w... 26 or 28 AWG tinned plated stranded wire should be sufficient.. TIA. if the .3w don't cost much more you can use them. remember the oem resistors are smd very small in physical size. a big bulky oversized pot is not needed. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on June 20, 2014, 05:44:55 PM I don't think it's possible to break anything with this mod, but in case you break something, I'm not responsible Why undervolt the antminer s1 ? Because with default voltage (1.1v), the chip has a very bad efficiency https://i.imgur.com/wOhy80a.png What are the results ? I wanted to achieve 0.85v on the asic. ( you can go at 0.75v if you want and share the result) With this voltage my 3 antminer s1 are hashing at 140 GH/s each for 500 watts (166 watts per ant) (corsair AX1200i) [1.19W/gh at the wall] all my ants have less than 1 % of HW (0.95 0.5 0.3) What is needed ?
The following value works for an antminer with R3 resistor = 4.47 kOhms When adding pencil on R3, the result will be a lower voltage on the chip, so it's difficult to burn anything by doing it. Voltage :
Freq (275 MHz): edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Is there a need to ssh into the S1 and change the freq settings or am I not understanding correctly why the freq is posted in the OP??? Thanks! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 20, 2014, 05:59:46 PM mstrongbow
it is two step. do the pencil mod or solder in a pot then ssh the freq down a bit. mine are 275 and 300. for my 3 s-1's two are at 275 and 1 at 300. these freq's gave me the total of 420gh and 560 watts and pretty low on errors. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Rock53 on June 21, 2014, 09:41:54 PM I have 10 S1 miners and I have 6 Thermaltake 1000w PSU's - I thought that I could run 2 of the miners on a single 1000w Thermaltake, but I can't. I have an 850w Corsair and I can run 2 S1 miners. None of my miners are overclocked. Maybe by under-volting my miners, I can run 2 on one of the Thermaltake PSU's. Will the drop in hashing be more than made up for in electricity savings by using 1 PSU instead of 2? Does anybody have any other suggestions about why I can't run 2 miners on a Thermaltake, but can on a Corsair? I don't want to spend any more money on buying more Corsairs' Has anyone had this problem? How did you fix it?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: elpres on June 21, 2014, 10:08:37 PM Have you tried using different PCI-E connectors?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 21, 2014, 11:14:17 PM I have 10 S1 miners and I have 6 Thermaltake 1000w PSU's - I thought that I could run 2 of the miners on a single 1000w Thermaltake, but I can't. I have an 850w Corsair and I can run 2 S1 miners. None of my miners are overclocked. Maybe by under-volting my miners, I can run 2 on one of the Thermaltake PSU's. Will the drop in hashing be more than made up for in electricity savings by using 1 PSU instead of 2? Does anybody have any other suggestions about why I can't run 2 miners on a Thermaltake, but can on a Corsair? I don't want to spend any more money on buying more Corsairs' Has anyone had this problem? How did you fix it? I had your issue with fractal 1000 watt psu's. you could buy this psu it runs 3 and is on sale 195 usd http://www.newegg.com/Product/Product.aspx?Item=N82E16817438011&cm_re=evga_1300-_-17-438-011-_-Product 35 usd rebate form http://images10.newegg.com/uploadfilesfornewegg/rebate/SH/EVGA17-438-011Jun17Jun2314yh62us.pdf you can do the pencil mod and clock your gear to 300 freq hashes at 140-150gh pull 180 -200 watts. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: leptar on June 22, 2014, 09:20:29 AM thanks philipma1957..
anyone take it to .75v? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on June 22, 2014, 03:54:30 PM thanks philipma1957.. anyone take it to .75v? I'm going to try to test the lower bounds in a couple days. Here's all of the frequency settings I nave been able to find. The list isn't complete and is lacking some timeout numbers. I think I have the info for 200mhz and 193mhz. I just have to dig around. Code:
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on June 26, 2014, 08:47:48 AM thanks philipma1957.. anyone take it to .75v? I'm going to try to test the lower bounds in a couple days. Here's all of the frequency settings I nave been able to find. The list isn't complete and is lacking some timeout numbers. I think I have the info for 200mhz and 193mhz. I just have to dig around. Code:
Nice! Just underclocked my Ants, awesome guide. I will fill in some of the frequencies above...I found a few googling around. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: allcoinminer on June 26, 2014, 09:20:09 AM Nice! Just underclocked my Ants, awesome guide. I will fill in some of the frequencies above...I found a few googling around. Take a look at BitMain's own undercloaking post. It will give you an extra edge on down clocking and down volting. It uses variable POTs to control voltage to the ASICs. The Resistors adjacent to the DC-DC converter need to be removed and attach a pot there. You need 1 pot for each DC-DC converter. The pot can be obtained from local market or ebay. Pencil mod will also work but with a little effort I recommend Bitmaintech's own hardware hack method especially if you are a Do-It-Yourselves guy. I will post the link to that post. You can do it yourselves or can get help from any DIY guy or an electronic repair shop. Update: Here is BITMAINTECH official undervolting/underclocking post https://bitcointalk.org/index.php?topic=526060.msg7031946#msg7031946 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on June 26, 2014, 03:22:53 PM Like this ;D
If you have the skills it's the best way to go. Congrat's. Got pic's? Sure do! sorry for the bad pic, I put it into service immediately ;D Hot melt glue, 10K pots, works great! http://i62.tinypic.com/2yl7cly.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: thresher on June 28, 2014, 12:31:12 AM Any videos of this anywhere. Way to confusing for me without a video :(
All the pencil mod ones on youtube don't use voltmeters either? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on June 28, 2014, 02:15:53 AM Any videos of this anywhere. Way to confusing for me without a video :( All the pencil mod ones on youtube don't use voltmeters either? It's super easy to do! Don't even have to check the voltage to get decent results. Just check the Ohms before and after applying the pencil. I will see about putting a short video up for the S1 pencil mod. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 28, 2014, 03:04:57 AM Any videos of this anywhere. Way to confusing for me without a video :( All the pencil mod ones on youtube don't use voltmeters either? It's super easy to do! Don't even have to check the voltage to get decent results. Just check the Ohms before and after applying the pencil. I will see about putting a short video up for the S1 pencil mod. 8 resisters 2 or 3 pencil strokes on each one. ohms before 4.47k ohms after 2.9- 3.4k I allowed that much variance on purpose. Why because I wanted to see how forgiving the s-1 would be to less then perfect ohms. I did 3 s-1's two run at freq 275 one runs at freq 300 .. they pull 560 watts and do 420gh more then a month now .. no adjustments of any kind. watts stay between 555 and 565 hash stays near 420. I can begin to say how easy this is to do. don't muscle the pencil strokes . I used less pressure on them then when I write with a pencil. if you resisters stay between 2.9 and 3.4 you should do around 140gh a machine around 185 watts Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on June 28, 2014, 08:03:30 AM Any videos of this anywhere. Way to confusing for me without a video :( All the pencil mod ones on youtube don't use voltmeters either? It's super easy to do! Don't even have to check the voltage to get decent results. Just check the Ohms before and after applying the pencil. I will see about putting a short video up for the S1 pencil mod. 8 resisters 2 or 3 pencil strokes on each one. ohms before 4.47k ohms after 2.9- 3.4k I allowed that much variance on purpose. Why because I wanted to see how forgiving the s-1 would be to less then perfect ohms. I did 3 s-1's two run at freq 275 one runs at freq 300 .. they pull 560 watts and do 420gh more then a month now .. no adjustments of any kind. watts stay between 555 and 565 hash stays near 420. I can begin to say how easy this is to do. don't muscle the pencil strokes . I used less pressure on them then when I write with a pencil. if you resisters stay between 2.9 and 3.4 you should do around 140gh a machine around 185 watts I had 5x S1's running off a single 1000 Watt PSU ;D The hardest part was finding the frequency each miner preferred (lowest HWE etc) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: thresher on June 28, 2014, 01:04:12 PM Thanks for the replies. I guess I will try it again another day or something. Just sort of intimidating for me (like the first time you change a spark plug or something, your afraid your going to break everything.)
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 28, 2014, 01:56:29 PM Thanks for the replies. I guess I will try it again another day or something. Just sort of intimidating for me (like the first time you change a spark plug or something, your afraid your going to break everything.) the key to it is do not muscle the pencil . 2 or 3 medium pressure strokes on each of the 8 resistors. the ohm's should drop from 4.47k to 3.2k or so then set freq at 325 300 or 275 or 250. check the freq got set at one of the above. then check your hashing make sure the hw are pretty low 1 out of 80 or better is good. make sure no x just o on the two asic lines. if there are a lot of x try a freq lower.. I started with 325 on all three and it sucked. Then 300 and only 1 was good no x's 1 out of 75-80 errors. Then 275 on the other 2 they were good no x's and 1 out of 110 errors. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on June 29, 2014, 12:46:03 AM Thanks for the replies. I guess I will try it again another day or something. Just sort of intimidating for me (like the first time you change a spark plug or something, your afraid your going to break everything.) the key to it is do not muscle the pencil . 2 or 3 medium pressure strokes on each of the 8 resistors. the ohm's should drop from 4.47k to 3.2k or so then set freq at 325 300 or 275 or 250. check the freq got set at one of the above. then check your hashing make sure the hw are pretty low 1 out of 80 or better is good. make sure no x just o n the two asic lines. if there are a lot of x try a freq lower.. I started with 325 on all three and it sucked. Then 300 and only 1 was good no x's 1 out of 75-80 errors. Then 275 on the other 2 they were good no x's and 1 out of 110 errors. 300 is fine with 3.3 - 3.4 k Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: marunga on June 29, 2014, 07:52:48 PM Hello miners,
My undervolt using 10K potentiometers in parallel with the smd resistors... http://38.media.tumblr.com/d173c8c830b4e113d7216398767f490f/tumblr_n7y0nynSm31te5ijpo1_1280.jpg Used double-side tape under the potentiometers and soldered directly to the PCB. Easy way to adjust voltage. rgds, m Edited:spelling Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on June 29, 2014, 07:59:00 PM Hello miners, My undervolt using 10K potentiometers in parallel with the smd resistors... http://38.media.tumblr.com/d173c8c830b4e113d7216398767f490f/tumblr_n7y0nynSm31te5ijpo1_1280.jpg Used double-side tape under the potentiometers and soldered directely to the PCB. Easy way to adjust voltage. rgds, m if you have the skill set to do the work it is the best way. I wonder if the new s-3's will be reducible to .5 or .6 watts from the .78 watts . obvious that we are talking about doing thus mod in 3 or 4 months. not right now Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 01, 2014, 06:42:29 PM Is there a way someone can make a quick tutorial for this please? I'm too dumb/blind to see what to do.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 01, 2014, 06:47:50 PM Is there a way someone can make a quick tutorial for this please? I'm too dumb/blind to see what to do. I should have mine posted on youtube later tonight. I will post a link here after it has uploaded. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 01, 2014, 06:54:44 PM Is there a way someone can make a quick tutorial for this please? I'm too dumb/blind to see what to do. I should have mine posted on youtube later tonight. I will post a link here after it has uploaded. THANK JESUS! Would this mulimeter work? : http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g (http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 01, 2014, 07:15:41 PM Is there a way someone can make a quick tutorial for this please? I'm too dumb/blind to see what to do. I should have mine posted on youtube later tonight. I will post a link here after it has uploaded. THANK JESUS! Would this mulimeter work? : http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g (http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g) most likely it would. it has ohms at 20000. the 8 stock resistors should read 4470 so if you set the ohm part of the meter to 20000 you should get 8 readings close to the same. if you do the 2-3 pencil strokes it should drop to 3000 as long as the 8 resistors are all close it is the only reading you need. mine range from 2.9 to 3.4 k or 2900 to 3400. i allowed for that much variation on purpose so that I could post on this site that perfect ohm readings of 3200 or 3.2 across the board are not needed to work. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 01, 2014, 07:40:03 PM Is there a way someone can make a quick tutorial for this please? I'm too dumb/blind to see what to do. I should have mine posted on youtube later tonight. I will post a link here after it has uploaded. THANK JESUS! Would this mulimeter work? : http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g (http://www.halfords.com/motoring/garage-equipment/hand-tools/rolson-digital-multimeter?cm_mmc=Google+PLA-_-Garage+Equipment-_-Hand+Tools-_-710273&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istItemId=wxmtpaxpq&istBid=tzwl&_$$ja=cgid:8475777004|tsid:35522|cid:166296844|lid:50612710975|nw:g|crid:44739949204|rnd:17480797208219915733|dvc:c|adp:1o2|bku:1&gclid=CKiFiNvipL8CFUn4wgodRR4A2g) most likely it would. it has ohms at 20000. the 8 stock resistors should read 4470 so if you set the ohm part of the meter to 20000 you should get 8 readings close to the same. if you do the 2-3 pencil strokes it should drop to 3000 as long as the 8 resistors are all close it is the only reading you need. mine range from 2.9 to 3.4 k or 2900 to 3400. i allowed for that much variation on purpose so that I could post on this site that perfect ohm readings of 3200 or 3.2 across the board are not needed to work. I'm confused, which "pins" am i supposed to add the strokes to? This is why i am desperately in need of a video tutorial. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 01, 2014, 07:42:35 PM Also do i have to do this to both boards? or will doing it for one board apply it to the whole thing?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Brassguy on July 01, 2014, 07:45:19 PM 4 resistors per board. Both boards would have to be done.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 01, 2014, 07:45:50 PM I guess i should just wait for the youtube tutorial.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: rograz on July 01, 2014, 07:46:25 PM Also do i have to do this to both boards? or will doing it for one board apply it to the whole thing? both blades, 8 resistors in total Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 02, 2014, 01:34:32 AM I guess i should just wait for the youtube tutorial. Importing now and uploading to YouTube shortly. edit: Uploading now. I will post a link in a new reply. The video is rough (undedited) ;D Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 02, 2014, 02:32:52 AM How to Undervolt (Pencil Mod) Your Antminer S1 video...
http://youtu.be/Cj9hgoUnpTc It's still processing as I just uploaded it. Hope this helps! http://i1141.photobucket.com/albums/n596/MZStrongbow/Mining/AntS1undeclock_zps8750adbd.png (http://s1141.photobucket.com/user/MZStrongbow/media/Mining/AntS1undeclock_zps8750adbd.png.html) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 02:45:55 AM How to Undervolt (Pencil Mod) Your Antminer S1 video... http://youtu.be/Cj9hgoUnpTc It's still processing as I just uploaded it. Hope this helps! Still processing as I type. Try in 20 min or so. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 12:28:51 PM I love you stongbow, thanks.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 01:30:48 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 01:46:11 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? you need to ssh in via this video. but don't over clock under clock. https://www.youtube.com/watch?v=72FU4Z_n0B4 here is some more https://bitcointalk.org/index.php?topic=589429.0 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 02:07:54 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? you need to ssh in via this video. but don't over clock under clock. https://www.youtube.com/watch?v=72FU4Z_n0B4 here is some more https://bitcointalk.org/index.php?topic=589429.0 Thank you, Final noob question, How do i set up WIFI and how strong is the WIFI antenna? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 02:17:55 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? you need to ssh in via this video. but don't over clock under clock. https://www.youtube.com/watch?v=72FU4Z_n0B4 here is some more https://bitcointalk.org/index.php?topic=589429.0 Thank you, Final noob question, How do i set up WIFI and how strong is the WIFI antenna? many people skip the wifi they go cat 5 ethernet cable to this : http://www.amazon.com/IOGEAR-Universal-Ethernet-Adapter-GWU627/dp/B004UAKCS6/ref=sr_1_1?ie=UTF8&qid=1404310588&sr=8-1&keywords=ethernet+to+wifi+bridge Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 02:19:32 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? you need to ssh in via this video. but don't over clock under clock. https://www.youtube.com/watch?v=72FU4Z_n0B4 here is some more https://bitcointalk.org/index.php?topic=589429.0 Thank you, Final noob question, How do i set up WIFI and how strong is the WIFI antenna? many people skip the wifi they go cat 5 ethernet cable to this : http://www.amazon.com/IOGEAR-Universal-Ethernet-Adapter-GWU627/dp/B004UAKCS6/ref=sr_1_1?ie=UTF8&qid=1404310588&sr=8-1&keywords=ethernet+to+wifi+bridge What's that, i dont get it, I dont have WiFi N. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 02, 2014, 04:36:46 PM once you are @root (ssh into your S1) copy/paste each line and hit enter after each line...
cd /etc/config vim asic-freq use the "I" key to enter edit mode. Add/remove the # signs as needed (no # sign indicates ACTIVE freq) Use "ESC" key to exit edit mode type ":wq" and enter then "reboot" and enter Hope that helps edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 05:17:22 PM edit /etc/config/asic-freq Quote option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' Guys how do i find the /3tc/config/asic-freq folder? you need to ssh in via this video. but don't over clock under clock. https://www.youtube.com/watch?v=72FU4Z_n0B4 here is some more https://bitcointalk.org/index.php?topic=589429.0 Thank you, Final noob question, How do i set up WIFI and how strong is the WIFI antenna? many people skip the wifi they go cat 5 ethernet cable to this : http://www.amazon.com/IOGEAR-Universal-Ethernet-Adapter-GWU627/dp/B004UAKCS6/ref=sr_1_1?ie=UTF8&qid=1404310588&sr=8-1&keywords=ethernet+to+wifi+bridge What's that, i dont get it, I dont have WiFi N. wifi can be hard to get to work. I do all wifi workarounds at my location. http://www.newegg.com/Product/Product.aspx?Item=N82E16833704164&cm_re=tp-link_nano_powerline-_-33-704-164-_-Product if your wifi router has some cat 5/6 ports one of these plugs into the wall and your router. the other plugs into the wall next to your miner and into your miner. a wifi work around. and if you have lots of miners you pick this up http://www.newegg.com/Product/Product.aspx?Item=N82E16833156251&cm_re=8_port_switch-_-33-156-251-_-Product so for 1 miner wi fi router > nano-powerline > house wire> nano-powerline > antminer for lots of miners : wi fi router > nano-powerline > house wire> nano-powerline >8 port switch> lots of antminers Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 05:18:16 PM I have a good WI-FI antenna that came with my Computer's wifi card, it came with 2 so could i just use one of them on the antminer?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 02, 2014, 05:19:46 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 02, 2014, 05:20:09 PM I have a good WI-FI antenna that came with my Computer's wifi card, it came with 2 so could i just use one of them on the antminer? if it fits has has the right connector Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 05:20:33 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so? I wont risk it, multimeters are very cheap, i just ordered one for 0.027BTC VIA Snapcard (The product is on amazon) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 05:22:04 PM I have a good WI-FI antenna that came with my Computer's wifi card, it came with 2 so could i just use one of them on the antminer? if it fits has has the right connector What connector/fit does the antminer have? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 05:22:11 PM I have a good WI-FI antenna that came with my Computer's wifi card, it came with 2 so could i just use one of them on the antminer? If I recall no as the connector on the antminer does not fit typical antennas you need an adapter. There are some that got wifi to work so it is possible. you could start a thread with a title. ' I need help to set up wi fi for my antminer s-1 ' Ask for advice from some one that got it to work. Most people needed some kind of adapter or trick to do it. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 02, 2014, 05:23:42 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so? I wont risk it, multimeters are very cheap, i just ordered one for 0.027BTC VIA Snapcard (The product is on amazon) yeah ok... just got one on amazon for 7 bucks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 02, 2014, 05:25:17 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so? I wont risk it, multimeters are very cheap, i just ordered one for 0.027BTC VIA Snapcard (The product is on amazon) yeah ok... just got one on amazon for 7 bucks Lol i overpaid then xD Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 02, 2014, 05:27:53 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so? yeah you could . nothing cheaper then that. just don't blame anyone if it burns up. I used to do that with my red fury usb sticks worked fine. remember this gear cost more and uses more power. but 2 pencil strokes with medium pressure should work okay. saves 10-15 bucks on the meter. edit: good you purchased a meter Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 02, 2014, 05:32:12 PM Guys I dont have a fancy multimeter, would it be possible to just pencil mod the resistors without a multimeter with a #2 pencil? maybe just a few strokes on each to see what I get? then lower freq to 300 or so? yeah you could . nothing cheaper then that. just don't blame anyone if it burns up. I used to do that with my red fury usb sticks worked fine. remember this gear cost more and uses more power. but 2 pencil strokes with medium pressure should work okay. saves 10-15 bucks on the meter. edit: good you purchased a meter yeah 7 bucks isnt bad, and its amazon so technically I could just return it after i use it ;D might come in handy for the s3's however, so maybe ill hang onto it Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: dulac97 on July 02, 2014, 07:34:53 PM Once I undervolt, how easy is it to return an S1 to stock 180 gh/s (to perhaps sell at a future date) ?
Is it as easy as erasing the graphite and resetting the asic frequency? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 02, 2014, 07:56:52 PM Once I undervolt, how easy is it to return an S1 to stock 180 gh/s (to perhaps sell at a future date) ? Is it as easy as erasing the graphite and resetting the asic frequency? Yeppers. That easy! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: dulac97 on July 02, 2014, 08:02:21 PM Once I undervolt, how easy is it to return an S1 to stock 180 gh/s (to perhaps sell at a future date) ? Is it as easy as erasing the graphite and resetting the asic frequency? Yeppers. That easy! Thanks!!!! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: 7queue on July 07, 2014, 01:53:39 PM I have a good WI-FI antenna that came with my Computer's wifi card, it came with 2 so could i just use one of them on the antminer? If I recall no as the connector on the antminer does not fit typical antennas you need an adapter. There are some that got wifi to work so it is possible. you could start a thread with a title. ' I need help to set up wi fi for my antminer s-1 ' Ask for advice from some one that got it to work. Most people needed some kind of adapter or trick to do it. The S1's I have, have a Female RP-SMA connector so I used an antenna with a Male RP-SMA connector, I only setup one S1 with wifi with all S1's going into a switch and out through that one wifi connection. The antenna is a D-Link ANT24-0700. 8 ) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 07, 2014, 02:02:49 PM Once I undervolt, how easy is it to return an S1 to stock 180 gh/s (to perhaps sell at a future date) ? Is it as easy as erasing the graphite and resetting the asic frequency? A note on this .. I used q-tips and 91% alcohol to set my 3 back to stock. I sold them and I am shipping them out today. If you look very closely I had a 1,000,000,000 share. as I am solo mining while I test a block share is 16,000,000,000 so I was pretty close. would have been really nice to grab a block right before i ship. http://imagizer.imageshack.us/v2/1280x1024q90/849/cra8.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: oskuro on July 10, 2014, 08:12:03 AM Hi there. I have 2 S1 and i was thinking to sell them, because i bought 2 S3.
Then i found this tutorial for undervolting antminer S1. But i dont know whats the "pencil mod". what do i have to do?? just press where the image says with a pencil? or what? i dont get it xD Oh and most important thing. Is it worth it to dont sell S1, and when i have my S3(478GH/s @366W without OC),with my Corsair CX750M, then undervolt my 2 S1 and use them also with my 2 corsairs? Together with the S3?. Or i should better sell them?. Considering: 332W --> 280 GH/s (2 S1 with pencil mod) vs 366W --> 478 GH/s (1 S3). Is it worth it to undervolt then? or better sell them and buy maybe another S3. edit: ok i found here the pencil mod video tutorial, i will watch it to see how it works :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on July 10, 2014, 09:54:35 AM Hi there. I have 2 S1 and i was thinking to sell them, because i bought 2 S3. I am running 6 S1's as together they are still making @$20 a day and cost me @$7 to run with BTC at $620. So I plan on keep running them at normal speed until the cost gets closer to what they make then undervolt them which will drop my cost in about half. Also if BTC would happen to go back up they will stay profitable for sometime to come or I may want to run them during the winter just for the heat. I have 1 S3 coming but nobody knows for sure at this point what kind of unforeseen problems the S3 may have and I will not buy more until they get out into people's hands first.Then i found this tutorial for undervolting antminer S1. But i dont know whats the "pencil mod". what do i have to do?? just press where the image says with a pencil? or what? i dont get it xD Oh and most important thing. Is it worth it to dont sell S1, and when i have my S3(478GH/s @366W without OC),with my Corsair CX750M, then undervolt my 2 S1 and use them also with my 2 corsairs? Together with the S3?. Or i should better sell them?. Considering: 332W --> 280 GH/s (2 S1 with pencil mod) vs 366W --> 478 GH/s (1 S3). Is it worth it to undervolt then? or better sell them and buy maybe another S3. edit: ok i found here the pencil mod video tutorial, i will watch it to see how it works :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: oskuro on July 10, 2014, 10:00:17 AM Hi there. I have 2 S1 and i was thinking to sell them, because i bought 2 S3. I am running 6 S1's as together they are still making @$20 a day and cost me @$7 to run with BTC at $620. So I plan on keep running them at normal speed until the cost gets closer to what they make then undervolt them which will drop my cost in about half. Also if BTC would happen to go back up they will stay profitable for sometime to come or I may want to run them during the winter just for the heat. I have 1 S3 coming but nobody knows for sure at this point what kind of unforeseen problems the S3 may have and I will not buy more until they get out into people's hands first.Then i found this tutorial for undervolting antminer S1. But i dont know whats the "pencil mod". what do i have to do?? just press where the image says with a pencil? or what? i dont get it xD Oh and most important thing. Is it worth it to dont sell S1, and when i have my S3(478GH/s @366W without OC),with my Corsair CX750M, then undervolt my 2 S1 and use them also with my 2 corsairs? Together with the S3?. Or i should better sell them?. Considering: 332W --> 280 GH/s (2 S1 with pencil mod) vs 366W --> 478 GH/s (1 S3). Is it worth it to undervolt then? or better sell them and buy maybe another S3. edit: ok i found here the pencil mod video tutorial, i will watch it to see how it works :) Yeah but i mean, i can run 2 S1 @332W for 280GH/s .... or buy another S3 when i can, and it will be 366W for 478GH/s. I mean its almost the same W(332W vs 366W) but the GH/s is much higher on S3 than S1 (478GH/s vs 280GH/s) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: BrianB on July 10, 2014, 09:02:29 PM Just wanted to say "thanks" for all the info. Picked up used s1's and they are now voltmodded :)
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: oskuro on July 10, 2014, 09:29:12 PM Just wanted to say "thanks" for all the info. Picked up used s1's and they are now voltmodded :) Why you dont prefer to buy 1 S3 for example? 366W @478 GH/s. This tutorial is great but when you use 3 undervolted, would be better just 1 S3. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: pws328 on July 10, 2014, 09:36:50 PM Just wanted to say "thanks" for all the info. Picked up used s1's and they are now voltmodded :) Why you dont prefer to buy 1 S3 for example? 366W @478 GH/s. This tutorial is great but when you use 3 undervolted, would be better just 1 S3. The advantage is, he's hashing with those Today. Undervolted S1's may not be as cost effective per watt as the S3, but the advantage is time. There are loads of used S1's floating around that you can buy right now, and even the earliest ship date for the S3 is 7/14 + however long it takes to get to you. Batch 3 is sold out, and no telling when batch 4 will ship. So if you missed the S3 boat, an undervolted S1 lets you stay relatively competitive before the S3's hits. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: oskuro on July 10, 2014, 09:43:32 PM Just wanted to say "thanks" for all the info. Picked up used s1's and they are now voltmodded :) Why you dont prefer to buy 1 S3 for example? 366W @478 GH/s. This tutorial is great but when you use 3 undervolted, would be better just 1 S3. The advantage is, he's hashing with those Today. Undervolted S1's may not be as cost effective per watt as the S3, but the advantage is time. There are loads of used S1's floating around that you can buy right now, and even the earliest ship date for the S3 is 7/14 + however long it takes to get to you. Batch 3 is sold out, and no telling when batch 4 will ship. So if you missed the S3 boat, an undervolted S1 lets you stay relatively competitive before the S3's hits. Yeah thats right. I have 2 S1´s right now mining at 400 GH/s together at 420W each i think because OC.... and waiting for 2 S3(im batch 2). But once i get my 2 S3, i will sell my S1, but yeah right now if you just have S1, its nice to undervolt them, and its so easy and you safe a lot of power :) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: 1bigbyte on July 11, 2014, 02:55:22 AM Hello,
I was wondering if anyone could help me undervolt the S1. I currently have a v1.6 2014/01/04 and a v1.5 2013/12/16. both have the same readings for the R3 and R12 resistors. my resistor for R3 is 1.69k OHMS, and R12 is 4.4kohms. R12 being the one on the left and R3 being the one on the right. should i just be modding pencil modding the R12 or am I modding the R3? if R3 how much is should i lower it to? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 11, 2014, 03:34:15 AM Hello, I was wondering if anyone could help me undervolt the S1. I currently have a v1.6 2014/01/04 and a v1.5 2013/12/16. both have the same readings for the R3 and R12 resistors. my resistor for R3 is 1.69k OHMS, and R12 is 4.4kohms. R12 being the one on the left and R3 being the one on the right. should i just be modding pencil modding the R12 or am I modding the R3? if R3 how much is should i lower it to? Check out my YouTube video...link in my sig! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: 7queue on July 11, 2014, 09:13:27 PM Hello, I was wondering if anyone could help me undervolt the S1. I currently have a v1.6 2014/01/04 and a v1.5 2013/12/16. both have the same readings for the R3 and R12 resistors. my resistor for R3 is 1.69k OHMS, and R12 is 4.4kohms. R12 being the one on the left and R3 being the one on the right. should i just be modding pencil modding the R12 or am I modding the R3? if R3 how much is should i lower it to? Check out my YouTube video...link in my sig! Thanks for the video! Going to give this a try ... 8 ) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: 1bigbyte on July 12, 2014, 12:52:54 AM so I saw your video.
1) You measured R3 as about 4.68k ohms. my R3 measures 1.68kohm. 2)none the less, i did some conversions and found to achieve .85 v i need ~1.29kohms. 3) ssh in to antminer. edit /etc/config/asic-freq disabled # on 350 mhz section removed # on 200 mhz section. esc. :wq reboot antminer. antminer works but can't discover any chips. Left it on for about 20 mins to see if it needed time to boot up and got nothing. i measured the c17,c152, c284, c416. and they read ~.70 volts. +/- 0.01 volts. multimeter set to VDC 20. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 12, 2014, 04:06:55 AM so I saw your video. 1) You measured R3 as about 4.68k ohms. my R3 measures 1.68kohm. 2)none the less, i did some conversions and found to achieve .85 v i need ~1.29kohms. 3) ssh in to antminer. edit /etc/config/asic-freq disabled # on 350 mhz section removed # on 200 mhz section. esc. :wq reboot antminer. antminer works but can't discover any chips. Left it on for about 20 mins to see if it needed time to boot up and got nothing. i measured the c17,c152, c284, c416. and they read ~.70 volts. +/- 0.01 volts. multimeter set to VDC 20. Did you try cleaning the R3 resistor and check the value again? What were the readings for the other 7 resistors? Double check your config via ssh and I would start with FREQ 250 Cheers! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: doctom1981 on July 13, 2014, 10:11:08 PM Hello,
this is my first post, I am mining novice in BTC I got 2 used ants S1 for cheap and I tried the voltmod to ramp up the efficiency. It works, thanks for pointing it out! Great job! 8) (I live in germany and power cost is pretty horrible here: ~ 0,27€/kwh // ~ 0,36 in US$) But I still have a few questions: 1. How do I set the frequency correctly? option 'freq_value' '0A81' #275M <- What does this exactly mean? It changes with chip-freq setting as I have seen in the config. option 'chip_freq' '275' <- Can I adjust it in 1MHz-steps, by simply putting in the desired freq.-value? option 'timeout' '45' <- This seems to be just for booting up the ant, until chips are ready? 2. HW issue: The ants show much HW (in my opinion). After running the same time with mod@~0,85V they show the following in the browser interface: Ant#1: ACC:1381 REJ:3 HW:796 . In stock condition (180GH/s@350MHz) this ant had 0-10 HW even after running for 24h or more. Ant#2: ACC:1364 REJ:2 HW:2699 . Also in stock condition it had almost double HW of ACC. It got about 4°Celsius hotter than Ant#1 But the pool (BTCGuild) always shows the correct speed for both ants. Now around 140GH/s each. This is calculated by the submitted ACC+REJ shares, right? Or does the antminer also submit the #HW to the pool? Info about my rig: Both ants show the same fanspeed 1920rpm now and temp. 38-40°C. Room is 28°C, I will put my rig in a cooler place when everything is set up. Each blade is wired with 3 1sq-mm (~17AWG) wires for +12V and 3 for GND. Power is provided by 2 strong HP Proliant DPS-800GB (12V 82A each), which also run my ~170W scrypt rig. So I guess power is adequate. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 13, 2014, 10:41:25 PM Hello, this is my first post, I am mining novice in BTC I got 2 used ants S1 for cheap and I tried the voltmod to ramp up the efficiency. It works, thanks for pointing it out! Great job! 8) (I live in germany and power cost is pretty horrible here: ~ 0,27€/kwh // ~ 0,36 in US$) But I still have a few questions: 1. How do I set the frequency correctly? option 'freq_value' '0A81' #275M <- What does this exactly mean? It changes with chip-freq setting as I have seen in the config. option 'chip_freq' '275' <- Can I adjust it in 1MHz-steps, by simply putting in the desired freq.-value? option 'timeout' '45' <- This seems to be just for booting up the ant, until chips are ready? 2. HW issue: The ants show much HW (in my opinion). After running the same time with mod@~0,85V they show the following in the browser interface: Ant#1: ACC:1381 REJ:3 HW:796 . In stock condition (180GH/s@350MHz) this ant had 0-10 HW even after running for 24h or more. Ant#2: ACC:1364 REJ:2 HW:2699 . Also in stock condition it had almost double HW of ACC. It got about 4°Celsius hotter than Ant#1 But the pool (BTCGuild) always shows the correct speed for both ants. Now around 140GH/s each. This is calculated by the submitted ACC+REJ shares, right? Or does the antminer also submit the #HW to the pool? Info about my rig: Both ants show the same fanspeed 1920rpm now and temp. 38-40°C. Room is 28°C, I will put my rig in a cooler place when everything is set up. Each blade is wired with 3 1sq-mm (~17AWG) wires for +12V and 3 for GND. Power is provided by 2 strong HP Proliant DPS-800GB (12V 82A each), which also run my ~170W scrypt rig. So I guess power is adequate. here is my thread on freq settings https://bitcointalk.org/index.php?topic=589429.0 here is a you tube https://www.youtube.com/watch?v=72FU4Z_n0B4 use both to set at 275 or 300 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 13, 2014, 11:12:14 PM Hello, this is my first post, I am mining novice in BTC I got 2 used ants S1 for cheap and I tried the voltmod to ramp up the efficiency. It works, thanks for pointing it out! Great job! 8) (I live in germany and power cost is pretty horrible here: ~ 0,27€/kwh // ~ 0,36 in US$) But I still have a few questions: 1. How do I set the frequency correctly? option 'freq_value' '0A81' #275M <- What does this exactly mean? It changes with chip-freq setting as I have seen in the config. option 'chip_freq' '275' <- Can I adjust it in 1MHz-steps, by simply putting in the desired freq.-value? option 'timeout' '45' <- This seems to be just for booting up the ant, until chips are ready? 2. HW issue: The ants show much HW (in my opinion). After running the same time with mod@~0,85V they show the following in the browser interface: Ant#1: ACC:1381 REJ:3 HW:796 . In stock condition (180GH/s@350MHz) this ant had 0-10 HW even after running for 24h or more. Ant#2: ACC:1364 REJ:2 HW:2699 . Also in stock condition it had almost double HW of ACC. It got about 4°Celsius hotter than Ant#1 But the pool (BTCGuild) always shows the correct speed for both ants. Now around 140GH/s each. This is calculated by the submitted ACC+REJ shares, right? Or does the antminer also submit the #HW to the pool? Info about my rig: Both ants show the same fanspeed 1920rpm now and temp. 38-40°C. Room is 28°C, I will put my rig in a cooler place when everything is set up. Each blade is wired with 3 1sq-mm (~17AWG) wires for +12V and 3 for GND. Power is provided by 2 strong HP Proliant DPS-800GB (12V 82A each), which also run my ~170W scrypt rig. So I guess power is adequate. Okay, as far as changing the FREQ (frequency) of your Antminer S1... You will need Putty to SSH into the miner... http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html Run Putty.exe... Login using root@(your miner IP) [example root@192.168.1.99] Enter your miner password (default is root) Copy/paste the following code then press ENTER after each line (one line at a time) Code: cd /etc/config Press the "I" key to enable editing. ADD the # sign in front of the current running FREQ (it will NOT have the # sign-350 is factory) REMOVE the # sign from the FREQ you want to run. Press the "I" key Type or copy paste the following code Code: :wq Type "reboot" press ENTER That's it! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on July 14, 2014, 02:08:35 AM Hello, 1) its a hexcode that the chips interpret as a frequency command/modifier. There are formulas available to calculate a value, but plenty shared in the forums for common MHz intervals.this is my first post, I am mining novice in BTC But I still have a few questions: 1. How do I set the frequency correctly? option 'freq_value' '0A81' #275M <- What does this exactly mean? It changes with chip-freq setting as I have seen in the config. option 'chip_freq' '275' <- Can I adjust it in 1MHz-steps, by simply putting in the desired freq.-value? option 'timeout' '45' <- This seems to be just for booting up the ant, until chips are ready? 2) this is the value that the miner displays. as far as i know you could type words in that spot and still mine at whatever the hexcode frequency is 3) timeout is the expiry of hashing a specific nonce i think ps: '#' in coding denotes that what is after it is a text comment in the file but not a program command, usually used: function /file #this does yadda Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: doctom1981 on July 14, 2014, 10:13:42 PM Great Job, it works! Thanks guys!
And I learned to like linux, nice. A bit like the good old DOS-times. :) Now I can try the 0.75V mod. Once I get my homepage/photobucket working I will share some results. Happy mining! BTCBTCBTC Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: barracuda420 on July 18, 2014, 03:38:13 AM Just did a schweet hardware mod but f'd up the software stuff. Bad things with Putty. Think I deleted some stuff.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: armin22 on July 18, 2014, 03:42:16 AM Just did a schweet hardware mod but f'd up the software stuff. Bad things with Putty. Think I deleted some stuff. I'm sure Steve Jobs had something to do with it... a$$hole. TGHD(Thank GOD He's Dead). Will host for help. ok dude calm down and stop thanking god that steve jobs is dead, i mean after reading his book im pretty sure he was quite an awesome guy. Second of all, instead of throwing your tits ariund, why you no tell us whats aactually wrong? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: barracuda420 on July 18, 2014, 11:24:48 AM Sorry, too much drinkin...
I'm following mstrongbow's post above. I can get to the edit part and enter the code for 275M...copy & paste does not work. I have to enter all commands manually. After I enter the info, I press "I" and it just enters "I" into the file. I can't get out of the edit portion to do the ":wq" command. The miner boots and runs for a few minutes but starts beeping b/c of all HW(errors I think) and shows no GH/s. Tried again and seems to be working now. Putty is a PITA to navigate through. I watched the video but the guy was on a mac and it was different. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: pws328 on July 18, 2014, 03:09:05 PM Sorry, too much drinkin... I'm following mstrongbow's post above. I can get to the edit part and enter the code for 275M...copy & paste does not work. I have to enter all commands manually. After I enter the info, I press "I" and it just enters "I" into the file. I can't get out of the edit portion to do the ":wq" command. The miner boots and runs for a few minutes but starts beeping b/c of all HW(errors I think) and shows no GH/s. Tried again and seems to be working now. Putty is a PITA to navigate through. I watched the video but the guy was on a mac and it was different. Ya that actually took me a little while to figure out too. Had to look up an SSH tutorial just to figure out what to do. When you press I you are in edit mode, and you can type and delete and whatnot but nothing saves. To exit edit mode, just press ESC. Now you type in :wq to save the file you just edited, and reboot the miner. Also gotta watch out for the SSHing and drinking ;) From my experience electronics and drink don't mix well! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: 1bigbyte on July 18, 2014, 10:44:28 PM so I saw your video. 1) You measured R3 as about 4.68k ohms. my R3 measures 1.68kohm. 2)none the less, i did some conversions and found to achieve .85 v i need ~1.29kohms. 3) ssh in to antminer. edit /etc/config/asic-freq disabled # on 350 mhz section removed # on 200 mhz section. esc. :wq reboot antminer. antminer works but can't discover any chips. Left it on for about 20 mins to see if it needed time to boot up and got nothing. i measured the c17,c152, c284, c416. and they read ~.70 volts. +/- 0.01 volts. multimeter set to VDC 20. Did you try cleaning the R3 resistor and check the value again? What were the readings for the other 7 resistors? Double check your config via ssh and I would start with FREQ 250 Cheers! Thank you for the help! turns out the red and black leads was pretty specific. underclocked and undervolted, ~125gh/s at 170 watts. 250mhz. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: barracuda420 on July 18, 2014, 11:02:44 PM Good thing I did the soldering part before drink #6. Brought back many memories of modding PS2's back in the day. :'( ...good times.
Software part was what messed me up. I couldn't login with putty after so long b/c the miner shut down or wasn't available. I panicked, thought I destroyed it = drunken, ranting post. Plus my batch 1 S3's still haven't shipped. >:( Can someone post a link or give info as to what the fields in LuCI mean? From what I gather reading this thread, "HW" is errors. How are you guys calculating error %? I'd like to tweak it a bit for the best result...I soldered pot's in and adjusted each bank to 0.847V - 0.853V. Each Asic bank seems to have a balanced voltage output to maybe 4 Asics each(8 in the bank). I took readings from the capacitors(referred to as "yellow thingy" in this thread) and the capacitor below it.(they are polarized and I read from the side with the bar on it, it should be the + side of the Cap). Also, is there a way to restore the factory firmware? I may have drunkenly f00ked it with putty. This machine is messed up from the start. It had HW problems before the mod compared to the 2 newer S1's I have. Also, my load hasn't changed much. The board is stamped with build date 2013/12/16. Currently seeing: 11h2m uptime 139.xx GH/s avg. 14,562 HW. Load 2.30 2.15 2.14. All asics showing good(0's, not x's). Kill-o-watt readings: Amperage: 1.46A Wattage: 170W It's a lot better than the 3.3A @ stock 180 GH/s!!! On a sidenote, I'd like to offer my sincere apologies for the Steve Jobs comment. I realize that some idolize him and think that he was great for technology(electronics). As a degreed tech guy, I see him as just a great marketer and the reason we have micro-transactions aka nickel and diming for everything nowadays. There is one thing we can all agree on... Steve Wozniak is a genius!! :cheers Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 22, 2014, 10:32:34 PM so I undervolted 1 of my S1's to 275 freq and using pencil got each resistor down under 3 (some 2.8 some 2.9)
its been a couple days and im averaging 118GH on the ant GUI that seems low doesn't it? both units are on a 660w seasonic platinum PSU drawing 560 watts between the 2 (one S1 is overclocked to 200GH) only thing I can think of is I ran out of PCIE cables to power my new S3's so I pulled one from the S1 and rigged one blade on the undervolted S1 with molex to PCIE adapter (using 2 molex perif cables coming from the PSU so the adapter is not on 1 cable but 2) I figured this would be ok considering the S1 is undervolted and drawing less power Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 22, 2014, 11:20:07 PM Good thing I did the soldering part before drink #6. Brought back many memories of modding PS2's back in the day. :'( ...good times. Software part was what messed me up. I couldn't login with putty after so long b/c the miner shut down or wasn't available. I panicked, thought I destroyed it = drunken, ranting post. Plus my batch 1 S3's still haven't shipped. >:( Can someone post a link or give info as to what the fields in LuCI mean? From what I gather reading this thread, "HW" is errors. How are you guys calculating error %? I'd like to tweak it a bit for the best result...I soldered pot's in and adjusted each bank to 0.847V - 0.853V. Each Asic bank seems to have a balanced voltage output to maybe 4 Asics each(8 in the bank). I took readings from the capacitors(referred to as "yellow thingy" in this thread) and the capacitor below it.(they are polarized and I read from the side with the bar on it, it should be the + side of the Cap). Also, is there a way to restore the factory firmware? I may have drunkenly f00ked it with putty. This machine is messed up from the start. It had HW problems before the mod compared to the 2 newer S1's I have. Also, my load hasn't changed much. The board is stamped with build date 2013/12/16. Currently seeing: 11h2m uptime 139.xx GH/s avg. 14,562 HW. Load 2.30 2.15 2.14. All asics showing good(0's, not x's). Kill-o-watt readings: Amperage: 1.46A Wattage: 170W It's a lot better than the 3.3A @ stock 180 GH/s!!! On a sidenote, I'd like to offer my sincere apologies for the Steve Jobs comment. I realize that some idolize him and think that he was great for technology(electronics). As a degreed tech guy, I see him as just a great marketer and the reason we have micro-transactions aka nickel and diming for everything nowadays. There is one thing we can all agree on... Steve Wozniak is a genius!! :cheers hw/ hw+ diff a + diff r 139 gh and 170 watts is solid you did well Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Trends on July 23, 2014, 01:02:11 AM so I undervolted 1 of my S1's to 275 freq and using pencil got each resistor down under 3 (some 2.8 some 2.9) its been a couple days and im averaging 118GH on the ant GUI that seems low doesn't it? both units are on a 660w seasonic platinum PSU drawing 560 watts between the 2 (one S1 is overclocked to 200GH) only thing I can think of is I ran out of PCIE cables to power my new S3's so I pulled one from the S1 and rigged one blade on the undervolted S1 with molex to PCIE adapter (using 2 molex perif cables coming from the PSU so the adapter is not on 1 cable but 2) I figured this would be ok considering the S1 is undervolted and drawing less power For 275 your voltage should be up around 900mv. What is your voltage? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: taipo on July 23, 2014, 02:15:14 AM So what would happen if I just underclock to 275 without doing the pencil mod.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 23, 2014, 02:43:12 AM So what would happen if I just underclock to 275 without doing the pencil mod. you would hash at 140 gh and use 280 watts. you need to understand how easy it really is to do. 2 -4 lite to medium pencil strokes on 8 resistors 4 on each side of the miner. watts will drop from about 280 to about 170-200 depending on how perfect you got your resistors to drop. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: -droid- on July 23, 2014, 04:59:17 AM so I undervolted 1 of my S1's to 275 freq and using pencil got each resistor down under 3 (some 2.8 some 2.9) its been a couple days and im averaging 118GH on the ant GUI that seems low doesn't it? both units are on a 660w seasonic platinum PSU drawing 560 watts between the 2 (one S1 is overclocked to 200GH) only thing I can think of is I ran out of PCIE cables to power my new S3's so I pulled one from the S1 and rigged one blade on the undervolted S1 with molex to PCIE adapter (using 2 molex perif cables coming from the PSU so the adapter is not on 1 cable but 2) I figured this would be ok considering the S1 is undervolted and drawing less power For 275 your voltage should be up around 900mv. What is your voltage? I figured it out, for some reason even though I dropped each resistor to 2.8-3k with my pencil they all were somehow even lower down to 2.5k after a few days, i wonder if the lead can heat up and do something weird which would lower the resistance even further? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mstrongbow on July 23, 2014, 06:53:21 PM So what would happen if I just underclock to 275 without doing the pencil mod. you would hash at 140 gh and use 280 watts. you need to understand how easy it really is to do. 2 -4 lite to medium pencil strokes on 8 resistors 4 on each side of the miner. watts will drop from about 280 to about 170-200 depending on how perfect you got your resistors to drop. Or watch my video guide How to Undervolt (Pencil Mod) Your Antminer S1 video... http://youtu.be/Cj9hgoUnpTc It's still processing as I just uploaded it. Hope this helps! http://i1141.photobucket.com/albums/n596/MZStrongbow/Mining/AntS1undeclock_zps8750adbd.png (http://s1141.photobucket.com/user/MZStrongbow/media/Mining/AntS1undeclock_zps8750adbd.png.html) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jowaybea on July 30, 2014, 12:10:28 AM I wanted to post my thanks for this. I have 2xS1 that I may have gone a little heavy on the pencil, as they wouldn't mine stably @275mhz. I even checked the voltage and they were all spot on .84v to .86v. However, I clocked them on down to 250Mhz and they hash great @130GH. And on a gold rated PSU the two combined are only pulling 303W @ the wall. So, I'm considering 1.16 W/GH a success!
Thanks again! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on July 30, 2014, 04:28:42 AM I wanted to post my thanks for this. I have 2xS1 that I may have gone a little heavy on the pencil, as they wouldn't mine stably @275mhz. I even checked the voltage and they were all spot on .84v to .86v. However, I clocked them on down to 250Mhz and they hash great @130GH. And on a gold rated PSU the two combined are only pulling 303W @ the wall. So, I'm considering 1.16 W/GH a success! Thanks again! heck that is better then my freq 275 hash 140gh and 187 watts Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: jowaybea on July 30, 2014, 11:37:43 AM You know, I'm starting to suspect BTCGuild's Active worker summary. If I look at the S1's self reported Miner status, it's reporting 127.5GH. But nearly every time I look at BTCGuild it says >130. I'd say it's about 132 +/-4. However, if I look at BTCGuild's hourly chart, the numbers are definitely averaging less than 130GH. Also, my S3's are kinda doing the same thing. Reporting higher on BTCGuild than the local Miner Status.
So, 127.5GH @151W is more like 1.19 W/GH. I'm kinda surprised they're doing even that well, as I still get HW errors...Running about 11-12K per 58K accepted shares. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SLEI on July 30, 2014, 12:13:14 PM I undervolted my S1 V1.3 from year 2013 (very thin metal frame) with 3.3k resistors. Voltage is 0,82 and I´m hashing now with 250mhz and 125GH 2% error rate in very warm room. Measurement point was different than in first page picture, I measured from top of low row of capacitors.
I was shure first that operation was succesful but patient died as miner didn't work with 193 or 200mhz ;) Power consumption 170VA from wall. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on July 30, 2014, 12:33:09 PM I figured it out, for some reason even though I dropped each resistor to 2.8-3k with my pencil they all were somehow even lower down to 2.5k after a few days, i wonder if the lead can heat up and do something weird which would lower the resistance even further? ^that does happen. Its something that happens as the lead 'cures' and becomes less resistive as it does. Same thing hapened pencil-modding bitfury units - after a day or so from modding it would become unstable due to higher voltage. IME: after ~6hrs the 'curing' is about half-complete, at 12hrs about 75%, at 2days you should be totally stable and not see it stray any further. Its worth keeping this in mind when modding, particularly if the unit becomes less stable after a day or so from when it was modded Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: squashpile on August 02, 2014, 07:40:16 PM Undervolted two S1's last night once I got S3 online. I guess I did ok. I'm running these two on HP server power supply with breakout board. I have not checked power usage at wall yet.
Clocked @ 250 does that look about right? S1/1 Mining BTC at P2Pool: 101.56 Gh/s (121.79 Gh/s avg) A: 3925 R: 85 S: 34 HW: 5980 WU: 1701.41 U: 3.58 LW: 2889681 S1/2 Mining BTC at P2Pool: 137.68 Gh/s (127.79 Gh/s avg) A: 3780 R: 92 S: 58 HW: 1172 WU: 1785.22 U: 3.82 LW: 2674031 S3/1 Mining BTC at P2Pool: 469.32 Gh/s (445.72 Gh/s avg) A: 342 R: 5 S: 0 HW: 40 WU: 6239.09 U: 9.45 LW: 293717 S3/2 Mining BTC at P2Pool: 449.57 Gh/s (441.23 Gh/s avg) A: 7839 R: 140 S: 9 HW: 1050 WU: 6176 https://i.imgur.com/qOsxfQQ.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on August 02, 2014, 10:01:59 PM Undervolted two S1's last night once I got S3 online. I guess I did ok. I'm running these two on HP server power supply with breakout board. I have not checked power usage at wall yet. Clocked @ 250 does that look about right? S1/1 Mining BTC at P2Pool: 101.56 Gh/s (121.79 Gh/s avg) A: 3925 R: 85 S: 34 HW: 5980 WU: 1701.41 U: 3.58 LW: 2889681 S1/2 Mining BTC at P2Pool: 137.68 Gh/s (127.79 Gh/s avg) A: 3780 R: 92 S: 58 HW: 1172 WU: 1785.22 U: 3.82 LW: 2674031 S3/1 Mining BTC at P2Pool: 469.32 Gh/s (445.72 Gh/s avg) A: 342 R: 5 S: 0 HW: 40 WU: 6239.09 U: 9.45 LW: 293717 S3/2 Mining BTC at P2Pool: 449.57 Gh/s (441.23 Gh/s avg) A: 7839 R: 140 S: 9 HW: 1050 WU: 6176 https://i.imgur.com/qOsxfQQ.jpg the first s1 looks weak you are missing hash or info the hw is 5980 which is okay only if you have a diffA over 500000 your stats page should list hw diffA and diffR error rate = hw/diffA+ diffR IIRC so I can't see your error rate. my guess is that s-1 is not hitting on all asics and has an x or 2 in the chain. the other one is good. Edit: the error rate is good. I missed the small print of the time. a hw of 5980 in 18 hours is decent. I still think one asic is an x the gh should be a little higher then 121 it should be like your other one 128 try changing to freq 275 to see what happens. I think the 127 will jump to 140. not too sure about the one at 121. you may be able to do one at freq 250>> gh of 121-127 and one at freq 275>> gh of 140. the weaker one may be what you can do at best. the higher one can stand a bump to freq 275 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: squashpile on August 03, 2014, 05:29:27 AM You are correct. It is weak and always has been after cold boot especially after undervolt.
Once I power off this one S1 I have to reboot it many times to get good ASIC status. Currently chain two is dorked as usual. Maybe a freq bump will kick it like you mentioned. Usually I can reboot it about 20 times and all is good until next power off. Power off and back on just starts the whole process over on this ant so I have reboot. I got tired of rebooting and left it..lol xxxxxxoo oooooooo oooooooo oooooooo Hey I appreciate the info/advice bud. EDIT: Bumped that good one up to 275. You right man. 140.78 average now Now back to rebooting the other one..lol Undervolted two S1's last night once I got S3 online. I guess I did ok. I'm running these two on HP server power supply with breakout board. I have not checked power usage at wall yet. Clocked @ 250 does that look about right? S1/1 Mining BTC at P2Pool: 101.56 Gh/s (121.79 Gh/s avg) A: 3925 R: 85 S: 34 HW: 5980 WU: 1701.41 U: 3.58 LW: 2889681 S1/2 Mining BTC at P2Pool: 137.68 Gh/s (127.79 Gh/s avg) A: 3780 R: 92 S: 58 HW: 1172 WU: 1785.22 U: 3.82 LW: 2674031 S3/1 Mining BTC at P2Pool: 469.32 Gh/s (445.72 Gh/s avg) A: 342 R: 5 S: 0 HW: 40 WU: 6239.09 U: 9.45 LW: 293717 S3/2 Mining BTC at P2Pool: 449.57 Gh/s (441.23 Gh/s avg) A: 7839 R: 140 S: 9 HW: 1050 WU: 6176 https://i.imgur.com/qOsxfQQ.jpg the first s1 looks weak you are missing hash or info the hw is 5980 which is okay only if you have a diffA over 500000 your stats page should list hw diffA and diffR error rate = hw/diffA+ diffR IIRC so I can't see your error rate. my guess is that s-1 is not hitting on all asics and has an x or 2 in the chain. the other one is good. Edit: the error rate is good. I missed the small print of the time. a hw of 5980 in 18 hours is decent. I still think one asic is an x the gh should be a little higher then 121 it should be like your other one 128 try changing to freq 275 to see what happens. I think the 127 will jump to 140. not too sure about the one at 121. you may be able to do one at freq 250>> gh of 121-127 and one at freq 275>> gh of 140. the weaker one may be what you can do at best. the higher one can stand a bump to freq 275 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoin_miner on August 10, 2014, 01:11:42 AM how long time pencil mod will work, if will permanent?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: grn on August 10, 2014, 01:56:06 AM how long time pencil mod will work, if will permanent? until you erase it Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: leptar on August 10, 2014, 11:21:35 AM how long time pencil mod will work, if will permanent? keep an eye on errors... the more errors you get the lower the resistance... in my case.. had 2 ants go from .26 to 1.23 in 3 days... the others are holding steady from .09 -.54 7 ants here 3 weeks modded had to touch up 2 ants as the errors increased and the ohms went from 2.88 to 2.45... I checked the others.. i'm still in the 3.0 range +-.1 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: JohanM on August 10, 2014, 08:30:25 PM Question about the PCIe connectors and normal 12V-0V connectors.
I am using Corsair CX500M (38A on 12V rail) to power 1 ANt. When I voltmod them it will be possible to power 2 ants on 1 PSU. Question. Can I connect just 1 cable from PSU to ANT, and then connect the 2 normal 12V-0V between the 2 boards ? Will that work ? I should think so but never tried... Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: lucazane on August 10, 2014, 09:21:41 PM Question about the PCIe connectors and normal 12V-0V connectors. depend on the size of the cable.I am using Corsair CX500M (38A on 12V rail) to power 1 ANt. When I voltmod them it will be possible to power 2 ants on 1 PSU. Question. Can I connect just 1 cable from PSU to ANT, and then connect the 2 normal 12V-0V between the 2 boards ? Will that work ? I should think so but never tried... if your ant do not need more than 200watts it should be ok. check if the cable don't get too hot. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: JohanM on August 12, 2014, 06:24:07 PM Some experience with undervolting:
- soldering 10k pots is VERY hard. the first 3 took ages since it is both very small and the solder does not take easily. On top of that when you heat too long the smd resistors fry and go up in resistance. luckily you can compensate with the pots. - the clue is to solder quickly (and use fresh solder within a few secs) - I used 10k pot in parallel so to lower the resistance to 2.9kohm (from 4.47kohm). I need to set my pots to 8.3kohm for this So this was stock: 395W at wall (from a Corsair 80+ gold psu), 180Gh/s, 350Mhz I tried 300Mhz but gave too much HW's. So then I tried 275Mhz: 192W at wall, 140Gh/s So a reduction of 23% in hashing power gives a reduction of 52% in power consumption. Power consumption is now 1.37 W/Gh (down from 2.2 W/Gh). Fan powers down to 1440rpm (down from 2160rpm) I'll run this for a day to see how it goes. Then try 1 antminer with pencil method and see how that holds up. Anyone did the potentiometer modding with also removing the SMD completely? How is that done ? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: basil3legs on August 14, 2014, 05:39:09 PM Anyone did the potentiometer modding with also removing the SMD completely? How is that done ? The first one I did (OK, so I have only actually done one of the two boards on that one) I used a very hot soldering iron to remove the SMD which was not ideal (pressed on the top mainly as it didn't matter if it got fried). Also the bit was way too big to solder on the wires and it took ages - hence only the one board done. I haven't done the other board yet as the pencil is working really well on that one. After purchasing a much smaller pointy bit I also discovered an old soldering iron I still had and using two to desolder with, one on each end, was really easy! I was also using a hands free magnifying glass thing which helped a lot. With the smaller bit, it was also a lot easier to solder the wires on, again with the magnifying glass really helping. I am currently using c. 0.85V through the chips but am tempted to try lowering it even more and probably will do soon, probably when I get around to soldering the second board on the first one I modded, although I have one other that is still relying just on pencil (and 2 running at full speed still). One of the two completely modded S1s is running at 275MHz for around 141GH/s at c. 168 Watts at the wall (0.20% errors), the other is running at 262.5MHz for around 135GH/s at c. 160 Watts at the wall (0.65% errors). Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lucky7Gaming on August 14, 2014, 07:29:20 PM I was looking at the antminer S3 page, at it says it is 355 watts with a 225 mhz frequency.....Is it possible that that S3 just has a lot of undervolted S1 chips? Anyone with a S3 can comment on this? Or is this a nm change?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: alesx.onfire on August 16, 2014, 11:27:16 PM I was looking at the antminer S3 page, at it says it is 355 watts with a 225 mhz frequency.....Is it possible that that S3 just has a lot of undervolted S1 chips? Anyone with a S3 can comment on this? Or is this a nm change? 28nm Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: crazyates on August 17, 2014, 01:17:44 AM I was looking at the antminer S3 page, at it says it is 355 watts with a 225 mhz frequency.....Is it possible that that S3 just has a lot of undervolted S1 chips? Anyone with a S3 can comment on this? Or is this a nm change? That's basically what the S2 was. The S3 actually has fewer chips than a S1, it is in fact a die shrink, and the chips are much faster (per chip). Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lucky7Gaming on August 17, 2014, 03:14:05 AM I was looking at the antminer S3 page, at it says it is 355 watts with a 225 mhz frequency.....Is it possible that that S3 just has a lot of undervolted S1 chips? Anyone with a S3 can comment on this? Or is this a nm change? That's basically what the S2 was. The S3 actually has fewer chips than a S1, it is in fact a die shrink, and the chips are much faster (per chip). Okay cool. The s2 was really short lived though. Anyone e have one? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on August 17, 2014, 03:18:39 AM good so you jumped up to 275 and it runs decent. same idea on the weak one drop it from 250 to 225 see what happens as endless booting should be avoided if you can. I have found the range on these s-1 and s-3 to be big. You are correct. It is weak and always has been after cold boot especially after undervolt. Once I power off this one S1 I have to reboot it many times to get good ASIC status. Currently chain two is dorked as usual. Maybe a freq bump will kick it like you mentioned. Usually I can reboot it about 20 times and all is good until next power off. Power off and back on just starts the whole process over on this ant so I have reboot. I got tired of rebooting and left it..lol xxxxxxoo oooooooo oooooooo oooooooo Hey I appreciate the info/advice bud. EDIT: Bumped that good one up to 275. You right man. 140.78 average now Now back to rebooting the other one..lol Undervolted two S1's last night once I got S3 online. I guess I did ok. I'm running these two on HP server power supply with breakout board. I have not checked power usage at wall yet. Clocked @ 250 does that look about right? S1/1 Mining BTC at P2Pool: 101.56 Gh/s (121.79 Gh/s avg) A: 3925 R: 85 S: 34 HW: 5980 WU: 1701.41 U: 3.58 LW: 2889681 S1/2 Mining BTC at P2Pool: 137.68 Gh/s (127.79 Gh/s avg) A: 3780 R: 92 S: 58 HW: 1172 WU: 1785.22 U: 3.82 LW: 2674031 S3/1 Mining BTC at P2Pool: 469.32 Gh/s (445.72 Gh/s avg) A: 342 R: 5 S: 0 HW: 40 WU: 6239.09 U: 9.45 LW: 293717 S3/2 Mining BTC at P2Pool: 449.57 Gh/s (441.23 Gh/s avg) A: 7839 R: 140 S: 9 HW: 1050 WU: 6176 https://i.imgur.com/qOsxfQQ.jpg the first s1 looks weak you are missing hash or info the hw is 5980 which is okay only if you have a diffA over 500000 your stats page should list hw diffA and diffR error rate = hw/diffA+ diffR IIRC so I can't see your error rate. my guess is that s-1 is not hitting on all asics and has an x or 2 in the chain. the other one is good. Edit: the error rate is good. I missed the small print of the time. a hw of 5980 in 18 hours is decent. I still think one asic is an x the gh should be a little higher then 121 it should be like your other one 128 try changing to freq 275 to see what happens. I think the 127 will jump to 140. not too sure about the one at 121. you may be able to do one at freq 250>> gh of 121-127 and one at freq 275>> gh of 140. the weaker one may be what you can do at best. the higher one can stand a bump to freq 275 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: JohanM on August 17, 2014, 04:39:05 PM I finished undervolting my first 3 S1's with 10k pots.
2 are running fine, 1 is getting 1 to 8 x's after 24h. Does anyone know how to translate the position of the X-marks in the status screen to the actual location on the S1 ?? That'll make it a lot easier to re-check the ant. I did order a finer point (1.6mm) for my weller to do the next 4 S1 ... Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Bitcoin++ on August 18, 2014, 06:53:24 AM I'd like to minimize W/GH.
So far I've only tried OP's recommendation. My miners ended up at 185W @ 140 GH = 1.3 W/GH. Has anyone underclocked even more, and what W/GH do you reach? EDIT : See OP. He uses 0.85V but shows that 0,75V should be even more efficient. For 0.85V the resistance shall be between ~2.8kOhms and ~3kOhms. We should find out what Ohm that suits the 0.75V setting Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on August 18, 2014, 09:06:40 AM I'd like to minimize W/GH. I have 9 penciled mod down and was thinking of trying to go lower in a couple of weeks. Let me know how it works for you.So far I've only tried OP's recommendation. My miners ended up at 185W @ 140 GH = 1.3 W/GH. Has anyone underclocked even more, and what W/GH do you reach? EDIT : See OP. He uses 0.85V but shows that 0,75V should be even more efficient. For 0.85V the resistance shall be between ~2.8kOhms and ~3kOhms. We should find out what Ohm that suits the 0.75V setting Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: navigator on August 18, 2014, 07:56:16 PM I recently put 4 undervolted S1's on a single CX750 using decent looking 18ga pcie splitters. Each one running 225mhz, 115gh, ~137w for a total of 460gh/550w. The wires don't even get warm. The PSU is a lil warm. Thinking about bumping them up to 140gh/~166w when I get time. Just ordered some more splitters so I can do 4 more on another CX750.
Here are the splitters I'm using: http://www.ebay.com/itm/131197541426 (http://www.ebay.com/itm/131197541426) I've noticed that the S1's that performed well at 200gh with low hwe are the ones hardest to undervolt. Some of them eventually show up X's,etc... And the S1's that didn't perform well overclocked are the ones easiest to undervolt. I have one S1 that would never go above 195gh without many hwe. Now its been running for 78hrs at 115gh and only 3 hwe. Yes just 3. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoin_miner on August 19, 2014, 02:11:43 AM many thanks for this guide https://bitcointalk.org/index.php?topic=526060.0
I use Multiturn potensio for undervolt. https://bitcointalk.org/index.php?topic=526060.msg7586392#msg7586392 SSH I follow : https://bitcointalk.org/index.php?topic=526060.msg7828393#msg7828393 I choose Freq (275 MHz): option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' before undervolt : 454W from wall after undervolt : 222W from wall this is result Ghs my S1 antminer. http://img.prntscr.com/img?url=https://i.imgur.com/3n9s65w.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: gentacomp on August 19, 2014, 07:52:59 AM Any guide for S3 ? ;D
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Bitcoin++ on August 20, 2014, 12:17:01 PM I'd like to minimize W/GH. I have 9 penciled mod down and was thinking of trying to go lower in a couple of weeks. Let me know how it works for you.So far I've only tried OP's recommendation. My miners ended up at 185W @ 140 GH = 1.3 W/GH. Has anyone underclocked even more, and what W/GH do you reach? EDIT : See OP. He uses 0.85V but shows that 0,75V should be even more efficient. For 0.85V the resistance shall be between ~2.8kOhms and ~3kOhms. We should find out what Ohm that suits the 0.75V setting I tried resistance between ~2.3kOhms and ~2.6kOhms. Both my Ants run stable at around 128 GH with HW error well below 1%. New score is 150W @ 128 GH = 1.17 W/GH I use #option 'freq_value' '0981' #250M #option 'chip_freq' '250' #option 'timeout' '56' I suggest you try this first. If HW error is very low you can try at a higher frequency. If the HW error is high (>1%) you can try a lower frequency. List of frequency settings is in this thread. EDIT: A bonus is silence. Fans run at only 1320 RPM, hardly noticeable, and to eliminate any vibrations I put foam under the miners. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoin_miner on August 23, 2014, 02:43:11 AM After 4 days run in undervoltage, my antminer S1 stop hashing.. this is screenchoot antminer :
anyone here suggest me to repair it? https://i.imgur.com/brNT4DX.png many thanks for this guide https://bitcointalk.org/index.php?topic=526060.0 I use Multiturn potensio for undervolt. https://bitcointalk.org/index.php?topic=526060.msg7586392#msg7586392 SSH I follow : https://bitcointalk.org/index.php?topic=526060.msg7828393#msg7828393 I choose Freq (275 MHz): option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' before undervolt : 454W from wall after undervolt : 222W from wall this is result Ghs my S1 antminer. http://img.prntscr.com/img?url=https://i.imgur.com/3n9s65w.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoin_miner on August 23, 2014, 03:38:34 AM Now my antminer S1 ran again.
trouble caused in previous I use VR multitune 100K, several VRs shift value below 2.8K. After I replace with 10K Multitune and set to 2.85K. My S1 work.. After 4 days run in undervoltage, my antminer S1 stop hashing.. this is screenchoot antminer : anyone here suggest me to repair it? https://i.imgur.com/brNT4DX.png many thanks for this guide https://bitcointalk.org/index.php?topic=526060.0 I use Multiturn potensio for undervolt. https://bitcointalk.org/index.php?topic=526060.msg7586392#msg7586392 SSH I follow : https://bitcointalk.org/index.php?topic=526060.msg7828393#msg7828393 I choose Freq (275 MHz): option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' before undervolt : 454W from wall after undervolt : 222W from wall this is result Ghs my S1 antminer. http://img.prntscr.com/img?url=https://i.imgur.com/3n9s65w.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoin_miner on August 24, 2014, 01:25:27 PM can S1 undervoltage make profit?
caused now 140GH/s make $1.5/day Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: philipma1957 on August 24, 2014, 02:49:11 PM can S1 undervoltage make profit? caused now 140GH/s make $1.5/day all depends on you power cost. at 15 cents a kwatt and burning 185 watts for 140 gh it pays above the power cost. the power cost is around 67 cents a day for 15 cents a kwatt. so 1.50 - .67 = 83 cents a day profit. do not forget that in 50 days or so it will be a helpful little heater Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: squashpile on August 24, 2014, 07:56:06 PM 246W @275 averaging around 141GH/s. Isn't that wattage high? THat's messed up. I need to redo it.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mxz280 on August 25, 2014, 01:54:13 AM 179W @275 averaging around 140GH/s.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: mxz280 on August 25, 2014, 01:55:08 AM 179W @275 averaging around 140GH/s. 0.85VElapsed 18d 18h 25m 40s 148.15GH/S(5s) 140.10GH/S(avg) 402,578Accepted 74,727,110HW 1,957WU 52,743,027DiffA 98,046DiffR DiffS 182,950,239BestShare Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on August 25, 2014, 08:44:17 AM 246W @275 averaging around 141GH/s. Isn't that wattage high? THat's messed up. I need to redo it. I have 9 S1's running all at 275 MHz. My watts at the wall went from @375 watts to 170 watts and they hash at 135-140GHs. I pay .125 per KW, so I spend @.51 per day on electric with the miner making @$1.50 a day at today's difficulty and BTC value. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on August 29, 2014, 06:48:11 AM I did a couple today just as a test as it's now at about the crossover point where profitability is the same underclocked as overclocked. I soldered a 8.75k in parallel with R3 to bring it down to 0.85V, and changed the fan for a Helix 120mm (http://www.swiftech.com/Helix120.aspx) since I have a pile of them from my H220s.
Between two units I dropped from 843W at the wall (on an off brand 850W supply) and ~405GH/s to 341W and 281GH/s. They're super quiet as well, though I'm not yet convinced that with low enough ambient you couldn't just run them without a fan. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: catoboli on August 31, 2014, 04:39:56 PM This was super helpful, i can't believe how quickly diff is going up, crazy. i feel like my s3's are going to be obsolete next week.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: catoboli on August 31, 2014, 05:33:31 PM i currently have 6 s1's running at 200gh/s at 400w each powered by 2 corsair AX1200i's and its getting to the point where I'm not making much, i probably won't make anything after this next jump in diff unless BTC goes back up to 600.
Im looking to get these guys down to 200w each, and get all 6 on 1 psu. What appears to be the best config for them running around 200w? the Corsairs are a beast and although rated at 1200 I've run some of them at 1300 and 1400 for an extended period of time with no issues. I had to put the AX1500i that i have my 4 overlocked S3s connected to on its own circuit breaker. but then again at the price they are they should be crazy good pus's i want to drop the voltage down to .85. it looks like some people had some good luck getting around 150-160 ghs here. what freq are people using in this area. and i haven't seen much talk of dropping the voltage down to .75 what kind of results are people getting there. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: moug on September 01, 2014, 05:00:33 PM I found the best way is to have the cat5 un plugged, then pencil the resistors until the voltage reads 0.85 volts. Blow off the pencil dust.
Lay the unit on it's side so it's easy to work on. Get some 2.5 or 3.5 reading glasses or greater. After both sides done then plug the cat5 back in and SSH the unit and set it to 250 and record to GH/s for 1/2 hour then set to 275 and record for 1/2 hour then set to 300 and record. Some units work better at 250 and some at 275, recheck the voltage and adjust. I got around 160-170 watts and 120-140 GH/s on 12 units. GHash is good place to test if you already mine there. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on September 01, 2014, 05:36:34 PM i currently have 6 s1's running at 200gh/s at 400w each powered by 2 corsair AX1200i's and its getting to the point where I'm not making much, i probably won't make anything after this next jump in diff unless BTC goes back up to 600. Im looking to get these guys down to 200w each, and get all 6 on 1 psu. What appears to be the best config for them running around 200w? the Corsairs are a beast and although rated at 1200 I've run some of them at 1300 and 1400 for an extended period of time with no issues. I had to put the AX1500i that i have my 4 overlocked S3s connected to on its own circuit breaker. but then again at the price they are they should be crazy good pus's i want to drop the voltage down to .85. it looks like some people had some good luck getting around 150-160 ghs here. what freq are people using in this area. and i haven't seen much talk of dropping the voltage down to .75 what kind of results are people getting there. I am thinking in about 30 days or so I will try and drop mine down lower unless the value of BTC goes back up that is. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: eoakland on September 02, 2014, 01:00:23 AM Hi i want to give a big thank you to the OP of this thread for his step by step tutorial and for his hard work in providing an extended lifespan to the beast of it's time the s1. with that said, i was wondering if OP is currently mapping out the s3 and looking into the possibility of this being done also (when difficulty catches up to earning potential) ?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: eoakland on September 02, 2014, 01:09:07 AM I did a couple today just as a test as it's now at about the crossover point where profitability is the same underclocked as overclocked. I soldered a 8.75k in parallel with R3 to bring it down to 0.85V, and changed the fan for a Helix 120mm (http://www.swiftech.com/Helix120.aspx) since I have a pile of them from my H220s. Between two units I dropped from 843W at the wall (on an off brand 850W supply) and ~405GH/s to 341W and 281GH/s. They're super quiet as well, though I'm not yet convinced that with low enough ambient you couldn't just run them without a fan. that is pretty bad ass right ? the first thing i noticed was the noise level reduction on the s1. before my living room sounded like it had a mini-jet taking off, now it's very silent and does not produce as much heat. i am tempted to buy those goofy little heatsinks for the chips, but i know it probably is not required. so i don't think i will be dumping anymore $ into the s1. mr. teal, you may know better, but is it possible to daisy chain the s1's ? say if someone has a antminer with a bad controller card, can you splice it into an antminer that has a good controller card and have both units run from it ? thanks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on September 02, 2014, 01:52:12 AM I did a couple today just as a test as it's now at about the crossover point where profitability is the same underclocked as overclocked. I soldered a 8.75k in parallel with R3 to bring it down to 0.85V, and changed the fan for a Helix 120mm (http://www.swiftech.com/Helix120.aspx) since I have a pile of them from my H220s. Between two units I dropped from 843W at the wall (on an off brand 850W supply) and ~405GH/s to 341W and 281GH/s. They're super quiet as well, though I'm not yet convinced that with low enough ambient you couldn't just run them without a fan. that is pretty bad ass right ? the first thing i noticed was the noise level reduction on the s1. before my living room sounded like it had a mini-jet taking off, now it's very silent and does not produce as much heat. i am tempted to buy those goofy little heatsinks for the chips, but i know it probably is not required. so i don't think i will be dumping anymore $ into the s1. mr. teal, you may know better, but is it possible to daisy chain the s1's ? say if someone has a antminer with a bad controller card, can you splice it into an antminer that has a good controller card and have both units run from it ? thanks Once the S1 upgrade kits get out we should see people figuring out how to run a lot of boards with one controller. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: catoboli on September 06, 2014, 12:48:56 PM i currently have 6 s1's running at 200gh/s at 400w each powered by 2 corsair AX1200i's and its getting to the point where I'm not making much, i probably won't make anything after this next jump in diff unless BTC goes back up to 600. Im looking to get these guys down to 200w each, and get all 6 on 1 psu. What appears to be the best config for them running around 200w? the Corsairs are a beast and although rated at 1200 I've run some of them at 1300 and 1400 for an extended period of time with no issues. I had to put the AX1500i that i have my 4 overlocked S3s connected to on its own circuit breaker. but then again at the price they are they should be crazy good pus's i want to drop the voltage down to .85. it looks like some people had some good luck getting around 150-160 ghs here. what freq are people using in this area. and i haven't seen much talk of dropping the voltage down to .75 what kind of results are people getting there. Just an update, i undervolted 5 of my S1'a and left 1 at the overlocked speed and was able to get all 6 on the single psu. the undervalued one all average around 145 gh at about 170 watts at the wall. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: miguportugal on September 07, 2014, 02:47:48 AM this is very good, can we do the same to S3
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcanada on September 15, 2014, 04:38:25 AM just a quick note. 0.75v is not enough. Even 0.8v is not enough...
I find the minimum acceptable if you want low HWE% is 2.9kohm, but to be safe, a minimum of 3kohm is best... Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Moria843 on September 15, 2014, 03:13:42 PM When lowering the resistance on the 8 resistors make sure you're not also lowering the resistance of the 60k ohm directly above it. I have all of my eight S1s running at about a 1.17 J/GH effeciency.
Note that we should really be saying J/GH since a Joule is a unit of energy where W (watt) is the power or rate of energy use (watt=J/s). Also to compare apples to apples, or rates to rates, W/GH should really be W per GH/s to measure two rates (power, or rate of energy use, and hashing rate). Then the seconds cancel out if you W with J/s and get the proper J/GH, which is how Bitmain rates efficiency. As an electrical engineer it bothers me seeing that. It's like somebody asking how many horsepower does it take you to go 100 miles ??? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Soros Shorts on September 16, 2014, 08:51:56 AM It's like somebody asking how many horsepower does it take you to go 100 miles ??? I know exactly how much torque it takes to power up my car to a speed of 100 miles. Do you?Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Moria843 on September 16, 2014, 11:36:41 AM It's like somebody asking how many horsepower does it take you to go 100 miles ??? I know exactly how much torque it takes to power up my car to a speed of 100 miles. Do you?Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SLEI on September 20, 2014, 08:52:34 PM I modded first some miners with 3.3k resistors and they work at 250mhz about 120gh/s.
Then I bought blue box shaped 10k multiturn trimmers which are much easier to solder in place. I solder the legs direct to pads where the original resistors were, little bit hot glue secure them in place. 2.9 to 3k total resistance and 300mhz 150 gh/s with miner that worked 393mhz with 0% HW. Other miner with same trimmer mod makes too much errors what are the hex value for 297mhz and timeout? WHY Bittmain advertices using silver thermal paste which is usually conductive with S1 uppgrade kit if it leaks like original short circuits will follow ??? Title: Antminer S1 undervolt [1.55W/GH at the wall with 120V] Post by: Lumanet on September 27, 2014, 06:44:32 PM Hi Guys,
I am working on this underclocking as well and I got some different results when you use USA Power 120V. First I also tried the pencel mod but wasn't 100% happy with it so I did some researching on my own and found out if you really replace those resistors : R3, R66, R38, R52 The original capacity of the resistor is: 8.2 - 8.3 K Ohm I replaced them with an 0603 resistor with 4.12 K Ohm This got my Antminer's so far down that 3 of those now only do use ~612 Watt. This allowed me now to reduce the GHs/Watt costs to be : Original 1650 Watt for ~ 600 GHS = 2.75 Watt/GHS With the new Setup I get : Tuned 620 Watt for ~ 400 GHS = 1.55 Watt/GHS So if you do your math now you do recude your Power consumption by over 43% without buying new Hardware. All you do need to buy is a few 0603 4.12K Ohm resistors which cost like 3$ for 100 on eBay maybe even less. If you decide to do this with a normal solder iron use a thin pair of tweezers so you can hold the resistor better when you remove the old one. I did start with the left side first which is closer to the next resistor on the left. Since they are SMD you can apply some heat to is and it also soften the other end of the resistor so much that you can lift one end of the Circuit Board. Then you do the other side and you have your resistor removed. Next apply some solder to the left spot on the Circuit board and with help of your tweezers solder the new one in place as flat and good as possible. Than do the other end and measure with the Ohm Voltmeter and you should get between 2.8 - 2.9 K Ohm. Ensure you soldered it in place so it don't come loose. !!! WARNING !!!! When I did one of the 6 boards I did mistakenly not solder one resistor perfectly flat onto the ciruit board and when I put Power onto it it burned me 4 of the 8 Chips. When I did remeasure I noticed I suddenly had the wrong OHM which caused an over voltage to the chip. So please measure twice. Once done SSH into your Antminer to ensure it benefits from it's now lower Voltage by adjusting the multiplexing for chips : option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' This is the best Value you can archive now. Going higher or lower will reduce your GHS power. Some other help for this modding (Freg|Timeout|HEX) : 250.00 56 0981, 1385, 4981, 5382, 5385, 6786 256.25 54 1405, 5405 262.50 53 0a01, 1485, 4a01, 5485 268.75 52 1505, 5505 275.00 50 0a81, 1585, 4a81, 5585 281.25 49 1605, 5605 287.50 48 0b01, 1685, 4b01, 5685 293.75 47 1705, 5705 300.00 46 0580, 0b81, 0b84, 1785, 4b81, 5785 306.25 45 5805 312.50 44 0c04, 4c01, 5885 318.75 43 5905 325.00 43 0600, 0c84, 4c81, 5985 331.25 42 5a05 337.50 41 0d04, 4d01, 5a85 343.75 40 5b05 350.00 40 0680, 0d84, 4d81, 5b85 ~~~~~~~~~~~~ Also a big thing I noticed is if you lift the little Controller board and tape the top between the 2 Boards with Tape you get a much much better Airflow as you can see on the photo below : https://i.imgur.com/l3QtRlr.jpg https://i.imgur.com/bjVin15.jpg This board is modded with new 4.12 K Ohm resistors. https://i.imgur.com/Tuo8ZGt.jpg ~~~~~~~~~~~~ Lumanet Solar Energy LLC ( http://www.lumanetsolarenergy.com (http://www.lumanetsolarenergy.com) ) We do also offer soon remoded hashboards for sale over our Portal. Also we work on a 800Watt Server Power Supply Combo which will be below $80 but has a 69Amp 12V Rail. Which can be used to feed up to 4 underclocked Antminer S1 or 2 Antminer S3 ~~~~~~~~~~~~ Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on September 27, 2014, 06:51:29 PM What kind of power supplies are you using for those? Your numbers are quite bad on both ends; with an 80+ Gold supply on 120V I got 400W per unit at 200GH/s, and am now getting 170W at 140GH/s.
Title: Re: Antminer S1 undervolt [1.55W/GH at the wall with 120V] Post by: voffka05 on September 27, 2014, 11:58:54 PM Hi Guys, I am working on this underclocking as well and I got some different results when you use USA Power 120V. First I also tried the pencel mod but wasn't 100% happy with it so I did some researching on my own and found out if you really replace those resistors : R3, R66, R38, R52 The original capacity of the resistor is: 8.2 - 8.3 K Ohm I replaced them with an 0603 resistor with 4.12 K Ohm This got my Antminer's so far down that 3 of those now only do use ~612 Watt. This allowed me now to reduce the GHs/Watt costs to be : Original 1650 Watt for ~ 600 GHS = 2.75 Watt/GHS With the new Setup I get : Tuned 620 Watt for ~ 400 GHS = 1.55 Watt/GHS So if you do your math now you do recude your Power consumption by over 43% without buying new Hardware. All you do need to buy is a few 0603 4.12K Ohm resistors which cost like 3$ for 100 on eBay maybe even less. If you decide to do this with a normal solder iron use a thin pair of tweezers so you can hold the resistor better when you remove the old one. I did start with the left side first which is closer to the next resistor on the left. Since they are SMD you can apply some heat to is and it also soften the other end of the resistor so much that you can lift one end of the Circuit Board. Then you do the other side and you have your resistor removed. Next apply some solder to the left spot on the Circuit board and with help of your tweezers solder the new one in place as flat and good as possible. Than do the other end and measure with the Ohm Voltmeter and you should get between 2.8 - 2.9 K Ohm. Ensure you soldered it in place so it don't come loose. !!! WARNING !!!! When I did one of the 6 boards I did mistakenly not solder one resistor perfectly flat onto the ciruit board and when I put Power onto it it burned me 4 of the 8 Chips. When I did remeasure I noticed I suddenly had the wrong OHM which caused an over voltage to the chip. So please measure twice. Once done SSH into your Antminer to ensure it benefits from it's now lower Voltage by adjusting the multiplexing for chips : option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' This is the best Value you can archive now. Going higher or lower will reduce your GHS power. Some other help for this modding (Freg|Timeout|HEX) : 250.00 56 0981, 1385, 4981, 5382, 5385, 6786 256.25 54 1405, 5405 262.50 53 0a01, 1485, 4a01, 5485 268.75 52 1505, 5505 275.00 50 0a81, 1585, 4a81, 5585 281.25 49 1605, 5605 287.50 48 0b01, 1685, 4b01, 5685 293.75 47 1705, 5705 300.00 46 0580, 0b81, 0b84, 1785, 4b81, 5785 306.25 45 5805 312.50 44 0c04, 4c01, 5885 318.75 43 5905 325.00 43 0600, 0c84, 4c81, 5985 331.25 42 5a05 337.50 41 0d04, 4d01, 5a85 343.75 40 5b05 350.00 40 0680, 0d84, 4d81, 5b85 ~~~~~~~~~~~~ Also a big thing I noticed is if you lift the little Controller board and tape the top between the 2 Boards with Tape you get a much much better Airflow as you can see on the photo below : https://i.imgur.com/l3QtRlr.jpg https://i.imgur.com/bjVin15.jpg This board is modded with new 4.12 K Ohm resistors. https://i.imgur.com/Tuo8ZGt.jpg ~~~~~~~~~~~~ Lumanet Solar Energy LLC ( http://www.lumanetsolarenergy.com (http://www.lumanetsolarenergy.com) ) We do also offer soon remoded hashboards for sale over our Portal. Also we work on a 800Watt Server Power Supply Combo which will be below $80 but has a 69Amp 12V Rail. Which can be used to feed up to 4 underclocked Antminer S1 or 2 Antminer S3 ~~~~~~~~~~~~ attach sreen of asic's temp and speedfans rpm,please. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on September 28, 2014, 12:07:40 AM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear.
How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: xstr8guy on September 28, 2014, 12:12:36 AM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. Do you mean something else? Because S1s haven't been around for even a year. Title: 3 undervoltaged Antminers S1 in the desert no A/C (garage) Post by: Lumanet on September 28, 2014, 12:21:17 AM Here are the stats from today : https://i.imgur.com/2IosSNi.png https://i.imgur.com/cTdm7WX.png https://i.imgur.com/4T1xuKp.png I hope that helps. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on September 28, 2014, 04:13:04 AM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. I'm running the majority of them on Emerson DS450 server PSUs, and have a couple plugged into a cheap 850W HEC power supply I got for $40.How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7621664 I got the first one mid January, so I guess I ran them almost 9 months before I modded them at the start of September. Don't get me wrong, I'm not trying to be antagonistic here. The reason I asked about the power supplies was that using the kind of super cheap PSU of the kind that comes free in a $30 case is about the only reason I could see getting 2.75J/GH at stock settings. Pretty much everyone with a decent PSU is measuring closer to 2J/GH. I would double check your measurement equipment, I have a feeling something is malfunctioning or hooked up incorrectly. Your setup is likely drawing much less power than you're reporting here. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Taugeran on September 28, 2014, 05:38:15 AM Another success 140Gh/s @ 170W (crappy thermaltake TR2 450W psu)
Bonus: its wifi enabled so i have a movable hash heater sad note: to bring her back online i had to take offline my first bitfury M-Board rig who was a pet project (hand building hash cards to expand it from 3) but had become finicky as of late (vibration from slamming doors sent the cards a-wobbling and errors etc etc). https://i.imgur.com/Gte4zrQ.png Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitcoinbelieve on September 28, 2014, 07:06:13 AM I recently put 4 undervolted S1's on a single CX750 using decent looking 18ga pcie splitters. Each one running 225mhz, 115gh, ~137w for a total of 460gh/550w. The wires don't even get warm. The PSU is a lil warm. Thinking about bumping them up to 140gh/~166w when I get time. Just ordered some more splitters so I can do 4 more on another CX750. Here are the splitters I'm using: http://www.ebay.com/itm/131197541426 (http://www.ebay.com/itm/131197541426) I've noticed that the S1's that performed well at 200gh with low hwe are the ones hardest to undervolt. Some of them eventually show up X's,etc... And the S1's that didn't perform well overclocked are the ones easiest to undervolt. I have one S1 that would never go above 195gh without many hwe. Now its been running for 78hrs at 115gh and only 3 hwe. Yes just 3. Those splitters you ordered from ebay, it is not going to work. You needs to buy splitter with 8 PCI-E that split into 2x6 pins. I tried that in the past, it didn't powered the s1 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on September 28, 2014, 03:57:03 PM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. I'm running the majority of them on Emerson DS450 server PSUs, and have a couple plugged into a cheap 850W HEC power supply I got for $40.How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7621664 I got the first one mid January, so I guess I ran them almost 9 months before I modded them at the start of September. Don't get me wrong, I'm not trying to be antagonistic here. The reason I asked about the power supplies was that using the kind of super cheap PSU of the kind that comes free in a $30 case is about the only reason I could see getting 2.75J/GH at stock settings. Pretty much everyone with a decent PSU is measuring closer to 2J/GH. I would double check your measurement equipment, I have a feeling something is malfunctioning or hooked up incorrectly. Your setup is likely drawing much less power than you're reporting here. Not sure I do run this one infront of the hole setup so Switch, Outlet , PSU, Antminer all are measured otherwise you don't get a clear picture. One thing most people forget it the Cooling of the room. I am in NEW MEXICO so Desert and have my setup in the Garage. WHich itself is heated up to almost 90 degree with the Antminers now which is nice and warm :-) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sorehammer on September 28, 2014, 06:45:10 PM Undervolted my s1 cheers for the guide :)
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on September 28, 2014, 07:38:19 PM I recently put 4 undervolted S1's on a single CX750 using decent looking 18ga pcie splitters. Each one running 225mhz, 115gh, ~137w for a total of 460gh/550w. The wires don't even get warm. The PSU is a lil warm. Thinking about bumping them up to 140gh/~166w when I get time. Just ordered some more splitters so I can do 4 more on another CX750. Here are the splitters I'm using: http://www.ebay.com/itm/131197541426 (http://www.ebay.com/itm/131197541426) I've noticed that the S1's that performed well at 200gh with low hwe are the ones hardest to undervolt. Some of them eventually show up X's,etc... And the S1's that didn't perform well overclocked are the ones easiest to undervolt. I have one S1 that would never go above 195gh without many hwe. Now its been running for 78hrs at 115gh and only 3 hwe. Yes just 3. Those splitters you ordered from ebay, it is not going to work. You needs to buy splitter with 8 PCI-E that split into 2x6 pins. I tried that in the past, it didn't powered the s1 he just said his splitters work fine... and they should. 6pin->6pin splitters are totally fine to use. please note that these 18awg ebay splitters are often mediocre quality - 100W per split shouldnt be an issue, but if you tried it on a un-modded S1 or S3 you would likely melt the wires and start a fire at >150w per side of the splitter, or the combined >250W on the primary PCIe cable Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on September 28, 2014, 11:10:46 PM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. I'm running the majority of them on Emerson DS450 server PSUs, and have a couple plugged into a cheap 850W HEC power supply I got for $40.How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7621664 I got the first one mid January, so I guess I ran them almost 9 months before I modded them at the start of September. Don't get me wrong, I'm not trying to be antagonistic here. The reason I asked about the power supplies was that using the kind of super cheap PSU of the kind that comes free in a $30 case is about the only reason I could see getting 2.75J/GH at stock settings. Pretty much everyone with a decent PSU is measuring closer to 2J/GH. I would double check your measurement equipment, I have a feeling something is malfunctioning or hooked up incorrectly. Your setup is likely drawing much less power than you're reporting here. Not sure I do run this one infront of the hole setup so Switch, Outlet , PSU, Antminer all are measured otherwise you don't get a clear picture. One thing most people forget it the Cooling of the room. I am in NEW MEXICO so Desert and have my setup in the Garage. WHich itself is heated up to almost 90 degree with the Antminers now which is nice and warm :-) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on September 28, 2014, 11:24:26 PM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. I'm running the majority of them on Emerson DS450 server PSUs, and have a couple plugged into a cheap 850W HEC power supply I got for $40.How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7621664 I got the first one mid January, so I guess I ran them almost 9 months before I modded them at the start of September. Don't get me wrong, I'm not trying to be antagonistic here. The reason I asked about the power supplies was that using the kind of super cheap PSU of the kind that comes free in a $30 case is about the only reason I could see getting 2.75J/GH at stock settings. Pretty much everyone with a decent PSU is measuring closer to 2J/GH. I would double check your measurement equipment, I have a feeling something is malfunctioning or hooked up incorrectly. Your setup is likely drawing much less power than you're reporting here. Not sure I do run this one infront of the hole setup so Switch, Outlet , PSU, Antminer all are measured otherwise you don't get a clear picture. One thing most people forget it the Cooling of the room. I am in NEW MEXICO so Desert and have my setup in the Garage. WHich itself is heated up to almost 90 degree with the Antminers now which is nice and warm :-) OK tell me than what resistor did you use? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on September 28, 2014, 11:25:26 PM I do use a HP DPS-800GB which gives me a nice 69AMP Rail. I not sure if I would even mess with an 80+ Gold Power Supply those aren't build for 24/7 operations and will sooner or later fail on you. If I would remove my network Switch and maybe the low quality fan's which the Antminer has I might be able to reduce the costs a bit but I am already very happy with what I archived with those old S1's before I upgrade to some high end gear. I'm running the majority of them on Emerson DS450 server PSUs, and have a couple plugged into a cheap 850W HEC power supply I got for $40.How many month do your S1's did ran before you downgraded them ? Mine ran almost 2+ years straight 24/7. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7621664 I got the first one mid January, so I guess I ran them almost 9 months before I modded them at the start of September. Don't get me wrong, I'm not trying to be antagonistic here. The reason I asked about the power supplies was that using the kind of super cheap PSU of the kind that comes free in a $30 case is about the only reason I could see getting 2.75J/GH at stock settings. Pretty much everyone with a decent PSU is measuring closer to 2J/GH. I would double check your measurement equipment, I have a feeling something is malfunctioning or hooked up incorrectly. Your setup is likely drawing much less power than you're reporting here. Not sure I do run this one infront of the hole setup so Switch, Outlet , PSU, Antminer all are measured otherwise you don't get a clear picture. One thing most people forget it the Cooling of the room. I am in NEW MEXICO so Desert and have my setup in the Garage. WHich itself is heated up to almost 90 degree with the Antminers now which is nice and warm :-) OK tell me than what resistor did you use? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on September 29, 2014, 12:59:17 PM OK so if I do your way I come down to 2.97K Ohm. Which is almost 3K Ohm. Strange I replaced it with a 4.12K Ohm and I do get ~ 2.8 K Ohm.
Thank you for your info by the way. I do will further research and maybe it's the Voltage of the Power Supply which need's to be adjusted ? I will buy a 10K Ohm Multiturn today if possible and a 6K8 Ohm resistor as well. It maybe the Power Supply I use, since it's a Server Power Supply kicks out a little to much Power :-) Once I have this in place I update the channel on my findings. FYI who want's and need to calculate resistors in parallel here is a helpful link : http://www.sengpielaudio.com/calculator-paralresist.htm (http://www.sengpielaudio.com/calculator-paralresist.htm) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on September 29, 2014, 01:09:42 PM OK so if I do your way I come down to 2.97K Ohm. Which is almost 3K Ohm. Strange I replaced it with a 4.12K Ohm and I do get ~ 2.8 K Ohm. Keep in mind that when you measure across the resistor you're not really measuring just the resistor, you're measuring the whole circuit between those points.There shouldn't be much of a difference between the two methods, I just find it's a lot quicker to tack another resistor on than to pull the old one off. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: bitrev on September 30, 2014, 04:37:11 PM I followed this tutorial and it works fine.
Thanks mate. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on October 05, 2014, 04:12:39 PM Quick update for everone :
Antminer S1 isn't Antminer S1 anymore. Batch from this year act differently now !!! So please check your Antminer before you modify it. If you do have a 2014 Antminer S1 you might not get as good of a result. The older batches actually do work a lot better. Take a look onto your motherboard and you can see if it's newer or older. An other indicator is the yellow resistors in between the ASIC chips. If they are smaller you most likely have a newer model. I noticed running my Antminer's 24/7 that the newer model stalls and starts beeping when you clock it to 287 so i downed it to 275 and guess what... it also produce more GH's too. updates will be posted. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on October 12, 2014, 02:38:19 AM I'm at 22 undervolted S1s and I'm having some mixed results with variance as well. I haven't quite figured out if it is just a single or combination of factors; binning variance, manufacture date, capacitors (1200 or 1500), temperature, etc...
What I am sure of is that I have a few units that are very unhappy at 2.8-3.0 ohms and a frequency of 275. I'm currently letting everything run for a few more hours to get more informative results. I'm planning on stepping those units down slightly, but there's a lot of mixed posts about frequency value, chip frequency, and timeout. I've been using 0A81 275 and 45 for months, but with some of the newer ones not operating correctly I'm starting to wonder. I searched and found a massive frequency table: Code: chip_freq timeout freq_value(s) If you look at the values equal to or less than 275 you'll notice the timeout values are considerably different than the OPs, 45. The default asic-freq vi table also has frequency 250 at a timeout value of 55 vs this table at 56. TLDR: What timeout values are people using for frequencies of 275 and below? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on October 12, 2014, 09:11:26 PM Update:
Freq Value 1505 Freq 268 Timeout 52 I just switch 9 miners over to 268 and it the values I posted from the table above work. The next step on the table is 262.5, but I have a few that don't really need to be stepped down that far. Anyone happen to have or are able to determine a frequency value and timeout number for a frequency of 265? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: aurel57 on October 19, 2014, 11:01:32 AM Just wondering if anybody has this worked out for the S3 yet?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: voffka05 on October 19, 2014, 05:43:28 PM Just wondering if anybody has this worked out for the S3 yet? https://bitcointalk.org/index.php?topic=771979.0 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: pallol on October 30, 2014, 10:58:11 PM Update: Freq Value 1505 Freq 268 Timeout 52 I just switch 9 miners over to 268 and it the values I posted from the table above work. The next step on the table is 262.5, but I have a few that don't really need to be stepped down that far. Anyone happen to have or are able to determine a frequency value and timeout number for a frequency of 265? what is your HW rate like at this frequency? I had mine sitting at 275 with a HW around 4%. I could not reduce this even though I walked the timeout from 40 through to 55, so now mine is sitting at the default 250, with an almost 0% HW (one machine has been 0% for the last three days) I want to get as close to 275 as possible and I know some of the defaults just do not work (300 for example give me a very very low hash rate and high HW) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: warrensgun on October 30, 2014, 11:13:05 PM I think I've been using either of these settings
option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' option 'freq_value' '0a01' #267M option 'chip_freq' '267' option 'timeout' '53' Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on October 31, 2014, 12:19:27 AM Update: Freq Value 1505 Freq 268 Timeout 52 I just switch 9 miners over to 268 and it the values I posted from the table above work. The next step on the table is 262.5, but I have a few that don't really need to be stepped down that far. Anyone happen to have or are able to determine a frequency value and timeout number for a frequency of 265? what is your HW rate like at this frequency? I had mine sitting at 275 with a HW around 4%. I could not reduce this even though I walked the timeout from 40 through to 55, so now mine is sitting at the default 250, with an almost 0% HW (one machine has been 0% for the last three days) I want to get as close to 275 as possible and I know some of the defaults just do not work (300 for example give me a very very low hash rate and high HW) Recheck the resistance. It is a giant pain in the ass, but you need to adjust it every once in a while. As the units heat up the graphite bakes in and increases the resistance and lowers the voltage. If you keep them in a warm environment or stacked against each other it accelerates this. I just had to readjust 16 of them as they were getting up in the 2-6% range. Here's all of them after I readjusted them. I need to redo 24 + 27 as that was my first run through with those: #-Frequency-HW Error Percentage 1 275 = 0.29526542916726889801986331068943 2 275 = 0.62115496524246610234090456970006 3 275 = 0.23817991100379235015136527593905 4 262 = 1.420715117786610214752061797818 5 268 = 0.17169630125425603119634490585804 6 275 = 1.20790671325427633955219624587 7 275 = 0.18331280114123078473516947311905 8 268 = 0.36165085608083697405127173722769 9 275 = 0.21186440677966101694915254237288 10 268 = 0.70918402741122569319816735687377 11 268 = 0.49968110951768275373912915248864 12 275 = 0.34170646345878661448545764874231 13 275 = 1.9673807729572612767789858972979 14 275 = 0.47481498730798894795862586065377 15 275 = 0.6791942830244073656741999662125 16 268 = 0.53198186854696549987408713170486 17 275 = 0.43863837101047957795230479100523 18 275 = 0.41021045428810598087537035300329 19 275 = 0.67922119374401532077880625598468 20 275 = 0.29032854982484574301775789789368 21 262 = 0.01070080052179141591973380484797 22 268 = 0.12752589397725269826129329918819 23 268 = 0.29771095000081261053350097734885 24 275 = 3.4735131299000746191284894664367 25 275 = 0.85411213665794186527069844331175 26 275 = 0.29528606269128995930662355517787 27 275 = 3.0170086204243341624534494288025 UP1 275 = 0.37350073902379235969789229544126 UP2 275 = 0.84665203041665056262135282470168 UP3 275 = 0.17782269147173546733228135310189 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: pallol on October 31, 2014, 08:11:54 AM Recheck the resistance. It is a giant pain in the ass, but you need to adjust it every once in a while. yep, that did it, back into a good range now - thx Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on October 31, 2014, 11:06:45 AM Recheck the resistance. It is a giant pain in the ass, but you need to adjust it every once in a while. yep, that did it, back into a good range now - thxTitle: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: spazzdla on November 05, 2014, 01:56:04 PM I think I've been using either of these settings option 'freq_value' '0A81' #275M option 'chip_freq' '275' option 'timeout' '45' option 'freq_value' '0a01' #267M option 'chip_freq' '267' option 'timeout' '53' Can you set this from the web based application? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on November 06, 2014, 01:18:42 AM I think I may be missing something here I have not been able to reduce the power draw after completing the pencil mod.
My resistors have been modded to: Code: R3 2.96|3.0 Code: option 'freq_value' '0A81' #275M Hashing at 140gh~ with .5% error rate but still pulling 202w from the wall. ??? ??? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on November 06, 2014, 02:37:45 AM I think I may be missing something here I have not been able to reduce the power draw after completing the pencil mod. That is reduced power draw. You'd be pulling ~280W at the original voltage for 140GH/s.My resistors have been modded to: Code: R3 2.96|3.0 Code: option 'freq_value' '0A81' #275M Hashing at 140gh~ with .5% error rate but still pulling 202w from the wall. ??? ??? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on November 06, 2014, 03:09:09 AM I think I may be missing something here I have not been able to reduce the power draw after completing the pencil mod. That is reduced power draw. You'd be pulling ~280W at the original voltage for 140GH/s.My resistors have been modded to: Code: R3 2.96|3.0 Code: option 'freq_value' '0A81' #275M Hashing at 140gh~ with .5% error rate but still pulling 202w from the wall. ??? ??? Doh! :-X What should I do to get it closer to 150w? Keeps lowering the resistance? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on November 06, 2014, 03:15:15 AM I think I may be missing something here I have not been able to reduce the power draw after completing the pencil mod. That is reduced power draw. You'd be pulling ~280W at the original voltage for 140GH/s.My resistors have been modded to: Code: R3 2.96|3.0 Code: option 'freq_value' '0A81' #275M Hashing at 140gh~ with .5% error rate but still pulling 202w from the wall. ??? ??? Doh! :-X What should I do to get it closer to 150w? Keeps lowering the resistance? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on November 23, 2014, 05:33:32 PM so i tried undervolting, have 0.73-0.77 measured on all chip sections, but have tried a few frequencies between 193 and 250 with mixed results.
193-200 sems to cause reboots and only one side of chips recognizes, but does not hash at all in the first few minutes, then beeps and restarts 218-225 seems to cause about half the chips to work, for 60-80GH 250 caused errors and almost all chips x out any suggestion? im using an 8B pencil with reasonable precision. update: seems to be running pretty well at 212.5MHz and 65 timeout. started up with some errors, but after a reboot its now seeing all chips and producing ~120GH (no kill-a-watt handy though) just curious - how many people are moving these to smaller/no heatsinks once undervolted? I see Chaositec doing them in a tight stack at ~50GH (~45w?) per board, and I really want to do something similar (mostly to free up some fans to replace other noisy fans on rockminer gear) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on November 30, 2014, 01:07:02 AM I think I may be missing something here I have not been able to reduce the power draw after completing the pencil mod. That is reduced power draw. You'd be pulling ~280W at the original voltage for 140GH/s.My resistors have been modded to: Code: R3 2.96|3.0 Code: option 'freq_value' '0A81' #275M Hashing at 140gh~ with .5% error rate but still pulling 202w from the wall. ??? ??? Doh! :-X What should I do to get it closer to 150w? Keeps lowering the resistance? So I have been having some mixed results here too. I was able to get 3 ants down to .8v by reducing resistor values to 2.5ohms @ 200mhz have been hashing at ~111gh/s-~100gh/s @ 120w-125w at the wall. Others did not like being that low and would not hash. I had to reset to .84v @ 200mhz but are hashing 100gh/s @ 135w When I move them all from my workbench to their final homes I will re-measure them all and put the data in a spreadsheet to share with you all. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on November 30, 2014, 02:29:58 PM I haven't yet gotten out a wattmeter, but I have 4 units stable at resistance of 2.05-2.15 kOhm, or about 0.74-0.77V. 193-212 MHz gives 93-112GH per unit
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on November 30, 2014, 11:42:54 PM I haven't yet gotten out a multimeter, but I have 4 units stable at resistance of 2.05-2.15 kOhm, or about 0.74-0.77V. 193-212 MHz gives 93-112GH per unit Are you seeing lower power draw at that voltage? Im still struggling to get below 1.26w Oh for you guys wondering if you can stack these after modding I did this last night. https://i.imgur.com/tmuwSs6.jpg Two ants down the the size of one hashing 200mhz 2.8kohm .83w ~200gh/s @ 253w . Im working on putting 5 together today, defiantly helps with fitting them in the office for the winter. I set up the fans in a push pull and they are keeping the chips between 40c and 47c. It is a bit louder then before but that was expected. Im sure that if I used different fans it would be much quieter but I dont really mind. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: helipotte on December 01, 2014, 12:04:48 AM Use jumper wires between blades. This reduces the number of pci-e power connectors needed. I made small jumpers and ran them from the yellow/black screw terminals.
One pci-e 6-pin will easily handle the load of two blades at these levels. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on December 01, 2014, 12:30:32 AM Use jumper wires between blades. This reduces the number of pci-e power connectors needed. I made small jumpers and ran them from the yellow/black screw terminals. One pci-e 6-pin will easily handle the load of two blades at these levels. Nice tip thanks! Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: terrapinflyer on December 05, 2014, 11:23:16 PM I haven't yet gotten out a wattmeter, but I have 4 units stable at resistance of 2.05-2.15 kOhm, or about 0.74-0.77V. 193-212 MHz gives 93-112GH per unit Could you share your values for 193mhz please? I can get the two I re-applied graphite on to hash at the 212mhz but get dead chips at 193mhz. Im also still getting ~130w at the wall on each unit and hashing ~100gh at .76V and 212mhz. Nothing I do seems to get me any closer to 1.19w/gh, so any help would be greatly appreciated. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on December 06, 2014, 12:51:02 AM I haven't yet gotten out a wattmeter, but I have 4 units stable at resistance of 2.05-2.15 kOhm, or about 0.74-0.77V. 193-212 MHz gives 93-112GH per unit Could you share your values for 193mhz please? I can get the two I re-applied graphite on to hash at the 212mhz but get dead chips at 193mhz. Im also still getting ~130w at the wall on each unit and hashing ~100gh at .76V and 212mhz. Nothing I do seems to get me any closer to 1.19w/gh, so any help would be greatly appreciated. tbh i have had the same troubles with frequencies below 200MHz - they just dont handle well and i see lots of dead chips. i dont think its a voltage issue, but rather something related to the controller. at 200MHz timeout values as high as 60-65 are required, and timeout of 70+ results in no hashing at all (for any frequency - not sure if this is replicable using the cp2102 and a newer cgminer) tbh, 200-212.5mhz is more stable for me, and I run them at about 2.05-2.20 kohm (0.74-0.77V) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 06, 2014, 03:40:06 PM I haven't yet gotten out a wattmeter, but I have 4 units stable at resistance of 2.05-2.15 kOhm, or about 0.74-0.77V. 193-212 MHz gives 93-112GH per unit Could you share your values for 193mhz please? I can get the two I re-applied graphite on to hash at the 212mhz but get dead chips at 193mhz. Im also still getting ~130w at the wall on each unit and hashing ~100gh at .76V and 212mhz. Nothing I do seems to get me any closer to 1.19w/gh, so any help would be greatly appreciated. Code: desired setpoint frequency? 193 also, take a look here: https://bitcointalk.org/index.php?topic=857967.0 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 08, 2014, 11:50:01 PM well, got my ant blades down below 1 W/GH 254 GHS vs 241 W :-D (5x ant s1 blades) = 0,949 W/GH Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sidehack on December 09, 2014, 01:43:00 AM The best machine I've worked up so far ran 140GH (275MHz) at 152W DC (including fan and controller) with 1%HW errors. Most of the ones I've checked were about 165W DC, with a median around 0.84V for stable operation. Doing resistor replacements, not pencils.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 09, 2014, 02:33:21 AM The best machine I've worked up so far ran 140GH (275MHz) at 152W DC (including fan and controller) with 1%HW errors. Most of the ones I've checked were about 165W DC, with a median around 0.84V for stable operation. Doing resistor replacements, not pencils. im running with 0.75[0-8] Vcore on each blade, 200 MHz, 0.0027 - 0.157 % HW errors, connected to rm850 taking 241 W at the wall Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sidehack on December 09, 2014, 04:20:39 AM I'll crank mine down that far in a few months. I bet with the heatsinks on they'd run fanless if you sat 'em vertical on a wire rack for convection.
Are you tuning your banks individually, or just using the same voltage on all of them? I'm adjusting each bank as I go until the errors meet a threshold, then moving to the next bank. The entire machine, then, is running pretty much as efficient as it can for a given clock speed. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 09, 2014, 07:46:00 AM I'll crank mine down that far in a few months. I bet with the heatsinks on they'd run fanless if you sat 'em vertical on a wire rack for convection. Are you tuning your banks individually, or just using the same voltage on all of them? I'm adjusting each bank as I go until the errors meet a threshold, then moving to the next bank. The entire machine, then, is running pretty much as efficient as it can for a given clock speed. these are just blades (5 of them stacked with spacers), no heatsinks, but i have 2 fans in push/pull on them, i start out with setting them each at 0.75, then adjust until im satisfied with speed and error rate Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sidehack on December 09, 2014, 02:16:42 PM I haven't messed with condensing units yet. They're all at the shop, so there's no lack of space to stack 'em. Right now I have 12 stacked up pulling from a single DPS2K PSU, one 16AWG pair per blade. One of the units is clocked at 225, and its fan is spinning so slowly you can just about count the blades. Pretty cool they'll run without heatsinks, but those settings are <1W/GH and not terribly chip-dense on the boards so it makes sense.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: wpgdeez on December 09, 2014, 02:22:46 PM I've got to get off my lazy ass and mod my 20 S1's I've got sitting idle!
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 11, 2014, 10:03:05 AM https://i.imgur.com/AeGW6wP.jpg
https://i.imgur.com/1gmXAwR.png current info: running time - 15 minutes GHS: 473.69 Watt: 469 at wall when i start it up several of the blades produce a lot of errors, but it equals out over time... i will post stats after 6 hours again Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on December 11, 2014, 06:33:51 PM whats your resistance/voltage/freq/timeout settings like?
Ive found that 2.05-2.15 kohm is well suited to 206.25MHz/60 timeout, but it can vary a bit between boards. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 11, 2014, 08:55:36 PM whats your resistance/voltage/freq/timeout settings like? Ive found that 2.05-2.15 kohm is well suited to 206.25MHz/60 timeout, but it can vary a bit between boards. im using 1k85 (aprox) because each blade is optimized by them selves to reduce HW running at 200 MHz/60 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on December 11, 2014, 09:19:05 PM whats your resistance/voltage/freq/timeout settings like? Ive found that 2.05-2.15 kohm is well suited to 206.25MHz/60 timeout, but it can vary a bit between boards. im using 1k85 (aprox) because each blade is optimized by them selves to reduce HW running at 200 MHz/60 thats actually really helpful to know - I thought you were operating closer to 2k4 for some reason. that compares nicely against my finding that 2k1 is well suited to 212.5Mhz/60 and 2k is suited to 206.25Mhz/60 maybe i should push mine even lower then. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 11, 2014, 09:35:35 PM whats your resistance/voltage/freq/timeout settings like? Ive found that 2.05-2.15 kohm is well suited to 206.25MHz/60 timeout, but it can vary a bit between boards. im using 1k85 (aprox) because each blade is optimized by them selves to reduce HW running at 200 MHz/60 thats actually really helpful to know - I thought you were operating closer to 2k4 for some reason. that compares nicely against my finding that 2k1 is well suited to 212.5Mhz/60 and 2k is suited to 206.25Mhz/60 maybe i should push mine even lower then. i try to reach 0.75 v per chip, which is the optimal for this setting only problem i have found if you stack too many, you get a heat buildup and therefor slower hashing, so im taking my stack apart, and will try 2x5 stack instead (running in a warm room with other miners) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: helipotte on December 11, 2014, 09:46:13 PM What value resistor are you placing in parallel with the smd one to achieve 0.75V? I have been pencil modding my ants but the results are a bit to variable.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 11, 2014, 10:14:44 PM What value resistor are you placing in parallel with the smd one to achieve 0.75V? I have been pencil modding my ants but the results are a bit to variable. this is what im using: http://i01.i.aliimg.com/kf/UT8gQ2NXl0XXXagOFbXl.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Beaflag VonRathburg on December 12, 2014, 03:14:26 AM Could you post a photo of how you have the added resistors installed? I'm running 36x S1 at 140gh / 175 watts now, but this is the next logical step since I'm out of electricity.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: sidehack on December 12, 2014, 03:49:53 AM 10K multiturn trimpot, two pins laid across the top feedback resistor? That'd be a snazzy setup.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on December 12, 2014, 12:45:11 PM whats your resistance/voltage/freq/timeout settings like? Ive found that 2.05-2.15 kohm is well suited to 206.25MHz/60 timeout, but it can vary a bit between boards. im using 1k85 (aprox) because each blade is optimized by them selves to reduce HW running at 200 MHz/60 thats actually really helpful to know - I thought you were operating closer to 2k4 for some reason. that compares nicely against my finding that 2k1 is well suited to 212.5Mhz/60 and 2k is suited to 206.25Mhz/60 maybe i should push mine even lower then. i try to reach 0.75 v per chip, which is the optimal for this setting only problem i have found if you stack too many, you get a heat buildup and therefor slower hashing, so im taking my stack apart, and will try 2x5 stack instead (running in a warm room with other miners) why not just add a second fan to the stack, either side-by-side or as a push-pull configuration? that would probably do the trick. TBH i have found higher temps dont seem to be a big issue - I disconnected the fans on some of my undervolted/underclocked S1 units that were still in the original frame/heatsinks, and they peaked at about 58-65 C after maybe 20min, and seemed to hash just fine at that temperature. With the fans connected they run below 40C Once my standoffs arrive ill probably aim to get 48-54 C on the boards when stacked similar to your setup Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 12, 2014, 01:01:05 PM Could you post a photo of how you have the added resistors installed? I'm running 36x S1 at 140gh / 175 watts now, but this is the next logical step since I'm out of electricity. https://i.imgur.com/7GpMGCq.jpg https://i.imgur.com/UG2Xzao.jpg Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: MrTeal on December 12, 2014, 02:04:12 PM I would recommend against installing the pots as CHOASiTEC did. That will work fine as long as nothing goes wrong, but you just have the leads of the pot connected to the pad. Since there's no resistor in parallel if you accidentally pull the pot off, you'll destroy the chips. It's safer to leave the resistor on and put the pot in parallel.
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: CHAOSiTEC on December 12, 2014, 05:12:08 PM I would recommend against installing the pots as CHOASiTEC did. That will work fine as long as nothing goes wrong, but you just have the leads of the pot connected to the pad. Since there's no resistor in parallel if you accidentally pull the pot off, you'll destroy the chips. It's safer to leave the resistor on and put the pot in parallel. living on the edge :-p edit: if they do come off, voltage to the chip drops to 0.5 Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ensano on January 14, 2015, 03:54:36 AM https://i.imgur.com/AeGW6wP.jpg https://i.imgur.com/1gmXAwR.png current info: running time - 15 minutes GHS: 473.69 Watt: 469 at wall when i start it up several of the blades produce a lot of errors, but it equals out over time... i will post stats after 6 hours again Why not do away with the fans, fun at full voltage, and just submerge the stack in mineral oil ? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Moria843 on January 20, 2015, 06:56:38 PM A little off subject, but what program are you using to get the "Rig Stats" displayed?
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: intobit459 on January 26, 2015, 11:21:15 PM At .75v 193mhz i get all x on first two rows of both chips at 193mhz
If i set a high timeout i get better ghs but xs still come just not as fast. Around 30-75ghs How are you optimizing units some read .74 to .75 should they be more stable maybe remove some lead... Mine is a jan or feb 2014 antminer s1 on the stamp on pcb are these different I really want an extreme undervolt it was so stable overclocked. Should I go up to .8v Also off topic i notice my fan on corsair 500 bronze doesnt spin anymore on the s1 since undervolting. Is it because watts are so low or should I try another psu. I believe I had same results on my gold psu with x's but fan spun on that psu. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: doctom1981 on February 13, 2015, 02:46:07 AM I had the "x" problem, too. Maybe I still have. ::)
Here is what I did and tried: 1. Undervolt to ~0.85V with pencil mod, everything fine on various MHz-Settings, no x´s. 2. Undervolt to ~0.78V with pencil, on 2 of my ants the x´s show up. Usually the first 8 in first row, and sometimes even more, both rows. Sometimes I was able to get rid of them by reboot, sometimes they disappered alone. After a lot of trying clocks/timeouts from 162MHz up to 240MHz I was about to give it up. Nothing worked properly. Some days the x´s vanished, then show up again randomly. The pool hashrate also showed that the affected miners ran okay for several hours, then hashrate suddenly dropped from ~120 to 100 or even 80 GH/s and stabilized there. After all, I thought it was the pencil, because I was not able to get exact the same Voltages to all ASIC-sections of the antminer. 3. I removed the pencil, and soldered 4.7k resistors in parallel to our R3 and friends. Now I got a stable 0,776V (Load) - 0,779V (Idle) at each section of the hashboards. The Antminer is pulling now ~10,5Amps @ 11,97Volts DC and is hashing at ~120GH/s with 237MHz. So far so good. (Before it pulled ~13Amps with the 0,78V pencil mod) But when I moved my rig into the garage in november, the damn x´s got back. Random drops from 120 to 100, on the other ant from 120 to 90 GH/s. Temperatures in garage were around freezing, and I got it to barely 10 Celsius with the rig (4 Antminers total, and some Litecoin ASICs) running 24/7. Good to work some hours a day on my cars. COOLING INFO: even at 10 Celsius the fans ran so slow that you were able to count the blades on them. :) ASIC showed around 20 Celsius. Nice silence. 4. Since december the rig is back in my house, in my living room as a little helper to cut heating costs. Suddenly the x´s disappeared after 2 days of (intermittent) running! (I need to shut the rig down when nobody is at home, to avoid risk of fire.) Ok, so what could have caused the x´s? I believe it is only temperature and voltage that can cause it yet. I think the capacitors on the boards are aged, and some of them fail in cold conditions. Especially with voltmod, maybe the voltage gets very low under sudden load for a short time, causing the ASICs to crash... dont know. ??? And I do not know how well or bad the pre owners treated the miners, got all my 4 ant´s at the bay. After a little research, I also think my voltage is a little low, maybe too low to power all the ants properly. Got 2 HP DPS-800GB with backplane that power my rig. The litecoin-section surprisingly NEVER crashed with this setup, at the same 12V rail. Now I run 1 of the suspicious ants in the garage on a 12,34V PSU (instead of 11,97V from my HP proliant powermonster), to prove if voltage does matter. Actually running 4 hrs without x´s. Maybe I got it.... Next step is to get closer to 0,75V... a 3,9k Ohm in parallel gets me 2,1k and a resulting 0,76V under load. I will report if it works fine and how much the miner is pulling then in DC and AC. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SLEI on March 27, 2015, 02:07:19 PM I have undervolted my S1s with 10k trimmers to 0.85V and 0.75V.
Spring and summer is coming and I want to mod the rest of S1 space heaters to 0.75V but I can't find a table for settings of MHZ near 200. 200Mhz didn't work at 0.75V I had to use 225 and got over 1% errors, I did find some S2 settings but they have totally different timing setting (smaller values). I want stack 6 plates with original controllers and 2 fans, do boards without fan work? Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on March 27, 2015, 07:04:18 PM I have undervolted my S1s with 10k trimmers to 0.85V and 0.75V. Spring and summer is coming and I want to mod the rest of S1 space heaters to 0.75V but I can't find a table for settings of MHZ near 200. 200Mhz didn't work at 0.75V I had to use 225 and got over 1% errors, I did find some S2 settings but they have totally different timing setting (smaller values). I want stack 6 plates with original controllers and 2 fans, do boards without fan work? you need a fan if you stack the boards, or youll see everything reading in the 65-75C range. I put all my boards on 1" spacers and cool it with a pair of silent ~70cfm cougar fans. Its barely audible and brings the temps down to 55-65C even while tucked in a cubby. (in a better open location it might be 50-60C). This is without heatsinks Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: SLEI on March 28, 2015, 12:08:35 PM I ment that I stack 6 hashboard with spacers and put a fan on eatch end if/when I use original controllers one pair of boards don't have fan connection.
Silly me it was easy test, I took the 4-pin original connector off and miner worked with one extra 3-pin fan. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: Lumanet on May 07, 2015, 02:03:43 AM Hey guys I am back :-)
so where are we on all this ? Also I finally got my PSU adapter done :-) for the Delta DPS-800-BG A and guess what I even had 2 Antminer S3 overclocked to 890 Watt and 1000GHS on it running just fine for over 24h no problem. http://www.lumanetsolarenergy.com/index.php?route=product/category&path=81_85 Back to the other topic :-) SO I do have like 6 Antminer S1's and I done the swap of the resistors but now I like to even get rid of the control board and use USB adaptors instead to have than with a raspberry PI all 12 or more in a 19" rack stacked up and still outperforming the S5 chips or at least getting close to it. So how far are we on it??? Olaf from LSE LLC (Lumanet) Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: adaseb on January 10, 2016, 10:38:03 AM Just wondering what the lowest voltage was possible to achieve with this chip? I got an S2 that I am undervolting and can't get it stable under 0.70V
Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: klondike_bar on January 11, 2016, 02:23:38 AM Just wondering what the lowest voltage was possible to achieve with this chip? I got an S2 that I am undervolting and can't get it stable under 0.70V same here. <0.72 some chips start to get a bit iffy, and <0.68 i found that some chips dont initiate or produce high errors Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: adaseb on January 11, 2016, 04:01:30 AM Just wondering what the lowest voltage was possible to achieve with this chip? I got an S2 that I am undervolting and can't get it stable under 0.70V same here. <0.72 some chips start to get a bit iffy, and <0.68 i found that some chips dont initiate or produce high errors Yeah it seems like 0.70V is the absolute limit for these chips. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: ksoze75 on February 26, 2016, 08:48:23 AM Does anyone know where I can find a frequency list for these from 200-300? I am currently making stacks of these as well although I am not pushing them down as far as you are. I have a technician replace the surface mount resistors for me.
I run them all solar so for me it is not about getting them low as possible it is just about getting them low enough. I have two units/four boards running right now at 290GH for about 310W @ the wall. I built a RPi stratum proxy that I am using to reconfigure the mining cluster when needed. Thanks for the help. Title: Re: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] Post by: RichBC on February 26, 2016, 10:55:42 AM Does anyone know where I can find a frequency list for these from 200-300? I am currently making stacks of these as well although I am not pushing them down as far as you are. I have a technician replace the surface mount resistors for me. I run them all solar so for me it is not about getting them low as possible it is just about getting them low enough. I have two units/four boards running right now at 290GH for about 310W @ the wall. I built a RPi stratum proxy that I am using to reconfigure the mining cluster when needed. Thanks for the help. From earlier in the thread. thanks philipma1957.. anyone take it to .75v? I'm going to try to test the lower bounds in a couple days. Here's all of the frequency settings I nave been able to find. The list isn't complete and is lacking some timeout numbers. I think I have the info for 200mhz and 193mhz. I just have to dig around. Code:
Rich |
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