MrTeal
Legendary
 Offline
Activity: 1274
Merit: 1004
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December 29, 2014, 06:02:12 PM |
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Whoa! More than I expected, thank you again—and for the calculus refresher. I'm paying more attention now than I ever did in high school (fun?!). One last more question, if I may: in my previous calcs, I used an empirical 0.012745 BTC/Th/day - you arrived there via block reward, difficulty, and 20116.26. Where does 20116.26 come from? Representing luck?
Edit: Gh/Th
On average it takes ~2^32 (no exactly, it's actually 65535/2^48) hashes to find a diff1 share, and D diff1 shares to find a block. IE, it takes D*2^32 hashes to find a block. Therefore, your expected chance of finding a block per second is HR/(D*2^32), and thus your expected reward is BR*HR/(D*2^32). 86400 seconds in a day, so expected BTC/day is BR*HR*86400/(D*2^32), or 0.00002011626*BR*HR/D. I just multiplied that by 10^9 to give the result in GH/s. |
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"If you don't want people to know you're a scumbag then don't be a scumbag." -- margaritahuyan
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ElGabo
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December 29, 2014, 08:44:04 PM |
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^This is really making a big issue over pulling an extra 50GH out of a unit - a value of less than $18. voiding warranty or buying a second $20 fan and spending the time to install it is not worth it.
At the peak speeds, any improvements you make come at the cost of about 1-1.2W/GH. Running at 1500GH uses approx 210W less than running at 1700GH. Unless you have very cheap power it will likely make sense by summertime to throttle back the hardware to improve the overall efficiency - or have heat problems.
I personally have 3 arriving this week that I hope to achieve ~1400GH/800W so that the fan can be kept at a reasonable volume. At $0.15/kwh it doesnt make much sense for me to try and get another 300GH/400W out of the unit, as the added hashrate gains are entirely spent on added power draw. Same reason as Ive throttled my SP10 units from 1400Gh to 1260GH to save 200W
Sorry @knlondike but you misunderstood me. You calculate with a fix price of the machine. Calculate cost and profit. I'm not speeking about the only 50ghs but when the weather gets warmer this will be 100ghs (from 1680 ghs) or more. At 20 pieces it's 2000ghs.... And i have room much more than 20.... I hope you unerstand why i'm trying to find some solution..... curious what you pay for power. I understand the aspect of clocking hardware to its limit if its profitable, but if you need to make >$10 in modifications to gain 50GH/60W per unit, plus have slightly more PSUs/TH it could be more practical to buy an extra SP20 for that extra 1.65TH/$500. If its a hobby to do modifications though thats another story  Ok I'll give up... For me it's not hobby... It was a hobby with a Jupiter and some S1-s. Maybe would be practical to buy one more unit for sure. But I have a lot of high cfm fans and other parts laying around.... But at this point I give up. You don't know a lot of details so you can't make a judgement what am i do and why. But trust me, I have the reasons. So back to the original question. Any ideas to improve the cooling?  |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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Biodom
Legendary
Offline
Activity: 3738
Merit: 3844
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December 29, 2014, 08:51:42 PM |
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Just got off the phone with DHL regarding my GB SP20.
The miners are at their facility since 7:58 this am, but they won't deliver until tomorrow (Tue) because tomorrow is the "official" delivery day.
Did you ever hear this load of...? Sitting on a package for >24 hours because they can. I am sure that Spondoolies is unaware of such happenings.
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philipma1957
Legendary
 Online
Activity: 4102
Merit: 7764
'The right to privacy matters'
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December 29, 2014, 08:51:59 PM |
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^This is really making a big issue over pulling an extra 50GH out of a unit - a value of less than $18. voiding warranty or buying a second $20 fan and spending the time to install it is not worth it.
At the peak speeds, any improvements you make come at the cost of about 1-1.2W/GH. Running at 1500GH uses approx 210W less than running at 1700GH. Unless you have very cheap power it will likely make sense by summertime to throttle back the hardware to improve the overall efficiency - or have heat problems.
I personally have 3 arriving this week that I hope to achieve ~1400GH/800W so that the fan can be kept at a reasonable volume. At $0.15/kwh it doesnt make much sense for me to try and get another 300GH/400W out of the unit, as the added hashrate gains are entirely spent on added power draw. Same reason as Ive throttled my SP10 units from 1400Gh to 1260GH to save 200W
Sorry @knlondike but you misunderstood me. You calculate with a fix price of the machine. Calculate cost and profit. I'm not speeking about the only 50ghs but when the weather gets warmer this will be 100ghs (from 1680 ghs) or more. At 20 pieces it's 2000ghs.... And i have room much more than 20.... I hope you unerstand why i'm trying to find some solution..... curious what you pay for power. I understand the aspect of clocking hardware to its limit if its profitable, but if you need to make >$10 in modifications to gain 50GH/60W per unit, plus have slightly more PSUs/TH it could be more practical to buy an extra SP20 for that extra 1.65TH/$500. If its a hobby to do modifications though thats another story Ok I'll give up... For me it's not hobby... It was a hobby with a Jupiter and some S1-s. Maybe would be practical to buy one more unit for sure. But I have a lot of high cfm fans and other parts laying around.... But at this point I give up. You don't know a lot of details so you can't make a judgement what am i do and why. But trust me, I have the reasons. So back to the original question. Any ideas to improve the cooling? Do you live in a winter climate? do you have a home? can you get cold air to flow from outside to the intake on the miners. open a window put box fans in the window blow in cold air to the intake of the miners then open a second window let the hot air blow out. you would need 2 windows and a room with a shut door to do this build a pair of vents to direct the air. you say you have 20 of these so they stack 5 high make a 4 by 5 stack of them direct the cold air in and the hot air out. |
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ElGabo
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December 29, 2014, 09:06:12 PM |
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^This is really making a big issue over pulling an extra 50GH out of a unit - a value of less than $18. voiding warranty or buying a second $20 fan and spending the time to install it is not worth it.
At the peak speeds, any improvements you make come at the cost of about 1-1.2W/GH. Running at 1500GH uses approx 210W less than running at 1700GH. Unless you have very cheap power it will likely make sense by summertime to throttle back the hardware to improve the overall efficiency - or have heat problems.
I personally have 3 arriving this week that I hope to achieve ~1400GH/800W so that the fan can be kept at a reasonable volume. At $0.15/kwh it doesnt make much sense for me to try and get another 300GH/400W out of the unit, as the added hashrate gains are entirely spent on added power draw. Same reason as Ive throttled my SP10 units from 1400Gh to 1260GH to save 200W
Sorry @knlondike but you misunderstood me. You calculate with a fix price of the machine. Calculate cost and profit. I'm not speeking about the only 50ghs but when the weather gets warmer this will be 100ghs (from 1680 ghs) or more. At 20 pieces it's 2000ghs.... And i have room much more than 20.... I hope you unerstand why i'm trying to find some solution..... curious what you pay for power. I understand the aspect of clocking hardware to its limit if its profitable, but if you need to make >$10 in modifications to gain 50GH/60W per unit, plus have slightly more PSUs/TH it could be more practical to buy an extra SP20 for that extra 1.65TH/$500. If its a hobby to do modifications though thats another story Ok I'll give up... For me it's not hobby... It was a hobby with a Jupiter and some S1-s. Maybe would be practical to buy one more unit for sure. But I have a lot of high cfm fans and other parts laying around.... But at this point I give up. You don't know a lot of details so you can't make a judgement what am i do and why. But trust me, I have the reasons. So back to the original question. Any ideas to improve the cooling? Do you live in a winter climate? do you have a home? can you get cold air to flow from outside to the intake on the miners. open a window put box fans in the window blow in cold air to the intake of the miners then open a second window let the hot air blow out. you would need 2 windows and a room with a shut door to do this build a pair of vents to direct the air. you say you have 20 of these so they stack 5 high make a 4 by 5 stack of them direct the cold air in and the hot air out. I would like to find a solution to each machines. It's winter here now but I have to figure out something for the summer too.... |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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windpath
Legendary
Offline
Activity: 1258
Merit: 1027
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December 29, 2014, 09:10:53 PM |
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Looking for some SP20 help; things I've tried: Restart Upgrade firmware Swap PSUs They are running on 2x EVGA 750W PSUs each:   |
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ElGabo
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December 29, 2014, 09:17:21 PM |
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Looking for some SP20 help; things I've tried: Restart Upgrade firmware Swap PSUs They are running on 2x EVGA 750W PSUs each: One Psu is faulty. I had once nearly the same problem with one of my server psu-s but I had only on loop disabling. The psu looked fine both on load and without load. I've changed to an other one and the machine runs fine since them. Simply the machine didn't liked the psu. Maybe some noise or something, I don't know. Long story short. Grab a new psu, change it and you'll be right. (But it's only my opinion.) |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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Biffa
Legendary
Offline
Activity: 3220
Merit: 1220
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December 29, 2014, 09:19:02 PM |
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Looking for some SP20 help; things I've tried: Restart Upgrade firmware Swap PSUs They are running on 2x EVGA 750W PSUs each: On both machines only one board is hashing out of the two. In the first pic one the second board is hashing, in the second pic the first board is hashing. Focus on one at a time, if you swap the PSU's to the dead boards sockets does it come up? Swap PSUs and take another screen shot. |
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Biffa
Legendary
Offline
Activity: 3220
Merit: 1220
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December 29, 2014, 09:19:40 PM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
One Psu is faulty. I had once nearly the same problem with one of my server psu-s but I had only on loop disabling. The psu looked fine both on load and without load. I've changed to an other one and the machine runs fine since them. Simply the machine didn't liked the psu. Maybe some noise or something, I don't know. Long story short. Grab a new psu, change it and you'll be right. (But it's only my opinion.) He's got two SP20's and 4PSU's |
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ElGabo
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December 29, 2014, 09:22:37 PM |
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^This is really making a big issue over pulling an extra 50GH out of a unit - a value of less than $18. voiding warranty or buying a second $20 fan and spending the time to install it is not worth it.
At the peak speeds, any improvements you make come at the cost of about 1-1.2W/GH. Running at 1500GH uses approx 210W less than running at 1700GH. Unless you have very cheap power it will likely make sense by summertime to throttle back the hardware to improve the overall efficiency - or have heat problems.
I personally have 3 arriving this week that I hope to achieve ~1400GH/800W so that the fan can be kept at a reasonable volume. At $0.15/kwh it doesnt make much sense for me to try and get another 300GH/400W out of the unit, as the added hashrate gains are entirely spent on added power draw. Same reason as Ive throttled my SP10 units from 1400Gh to 1260GH to save 200W
Sorry @knlondike but you misunderstood me. You calculate with a fix price of the machine. Calculate cost and profit. I'm not speeking about the only 50ghs but when the weather gets warmer this will be 100ghs (from 1680 ghs) or more. At 20 pieces it's 2000ghs.... And i have room much more than 20.... I hope you unerstand why i'm trying to find some solution..... curious what you pay for power. I understand the aspect of clocking hardware to its limit if its profitable, but if you need to make >$10 in modifications to gain 50GH/60W per unit, plus have slightly more PSUs/TH it could be more practical to buy an extra SP20 for that extra 1.65TH/$500. If its a hobby to do modifications though thats another story Ok I'll give up... For me it's not hobby... It was a hobby with a Jupiter and some S1-s. Maybe would be practical to buy one more unit for sure. But I have a lot of high cfm fans and other parts laying around.... But at this point I give up. You don't know a lot of details so you can't make a judgement what am i do and why. But trust me, I have the reasons. So back to the original question. Any ideas to improve the cooling? Improving is easy. Good polish aluminum heatsink and the cooper block to mirror look, then put some good thermal paste, then put more powerful fan... Or go hard like this https://www.youtube.com/watch?v=PtufuXLvOokMineral oil LOL. |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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ElGabo
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December 29, 2014, 09:27:08 PM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
One Psu is faulty. I had once nearly the same problem with one of my server psu-s but I had only on loop disabling. The psu looked fine both on load and without load. I've changed to an other one and the machine runs fine since them. Simply the machine didn't liked the psu. Maybe some noise or something, I don't know. Long story short. Grab a new psu, change it and you'll be right. (But it's only my opinion.) He's got two SP20's and 4PSU's Sorry misread it. I've thinked the pictures about one machine before and after he swapped the psu-s. This way Biffa has the truth, try to put the 2 psu-s from the 2 working blades to one machine and check it. |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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windpath
Legendary
Offline
Activity: 1258
Merit: 1027
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December 29, 2014, 09:50:23 PM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
...
On both machines only one board is hashing out of the two. In the first pic one the second board is hashing, in the second pic the first board is hashing. Focus on one at a time, if you swap the PSU's to the dead boards sockets does it come up? Swap PSUs and take another screen shot. Here is a little bit of bizarre for you: All 4 PSUs on the 2 SP20s were EVGA 750 Watt (all tested and working), swapped the two ones that were on the non-running boards with corsair 650 watt and everything seems to be up and running fine... So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works. The 2 EVGA 750s that were not working on the SP20s are now powering other miners just fine... (que twilight zone music) |
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ElGabo
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December 29, 2014, 10:00:11 PM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
...
On both machines only one board is hashing out of the two. In the first pic one the second board is hashing, in the second pic the first board is hashing. Focus on one at a time, if you swap the PSU's to the dead boards sockets does it come up? Swap PSUs and take another screen shot. Here is a little bit of bizarre for you: All 4 PSUs on the 2 SP20s were EVGA 750 Watt (all tested and working), swapped the two ones that were on the non-running boards with corsair 650 watt and everything seems to be up and running fine... So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works. The 2 EVGA 750s that were not working on the SP20s are now powering other miners just fine... (que twilight zone music) That's what i wrote. I had the same with one of my server psu-s.... Strange thing but can happen... |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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DevonMiner
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December 29, 2014, 10:04:17 PM |
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So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works.
I've had this before as well with other kit ... doesn't seem to make sense, but your up and running! |
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ElGabo
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December 29, 2014, 10:06:57 PM |
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So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works.
I've had this before as well with other kit ... doesn't seem to make sense, but your up and running! Wrong edit. Windpath has this config not me. |
" I'm waiting for my punishment, I know it's on my way
So cut, cut, cut me up and fuck, fuck, fuck me up"
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zvisha
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December 29, 2014, 11:00:25 PM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
...
On both machines only one board is hashing out of the two. In the first pic one the second board is hashing, in the second pic the first board is hashing. Focus on one at a time, if you swap the PSU's to the dead boards sockets does it come up? Swap PSUs and take another screen shot. Here is a little bit of bizarre for you: All 4 PSUs on the 2 SP20s were EVGA 750 Watt (all tested and working), swapped the two ones that were on the non-running boards with corsair 650 watt and everything seems to be up and running fine... So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works. The 2 EVGA 750s that were not working on the SP20s are now powering other miners just fine... (que twilight zone music) There was no power to the DC2DC at time of miner_gate_arm start. My primary suspicion would be that the PSU was off, the connector was not inserted properly or the shortcut on the PSU motherboard connection was not good. Please try to make sure the PSU is running and the connectors are good, try to boot the units in bad configuration again and if you still get the problem send me logs (from webUI->"Settings tab"->"Get Logs"). Send to my mail "zvi@spond..." with reference to this post. |
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Syke
Legendary
Offline
Activity: 3878
Merit: 1193
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December 30, 2014, 12:16:39 AM |
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Yeah, I usually have 117-122V, but even with 110V I thought that 15A outlets (typical for US) are rated for constant 13A, hence 13X110=1440W
Go with 80% for continuous operation. 15A x .8 = 12A x 110V = 1320W or 12A x 120V = 1440W. |
Buy & Hold
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windpath
Legendary
Offline
Activity: 1258
Merit: 1027
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December 30, 2014, 12:49:05 AM |
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Looking for some SP20 help; things I've tried:
Restart
Upgrade firmware
Swap PSUs
They are running on 2x EVGA 750W PSUs each:
...
On both machines only one board is hashing out of the two. In the first pic one the second board is hashing, in the second pic the first board is hashing. Focus on one at a time, if you swap the PSU's to the dead boards sockets does it come up? Swap PSUs and take another screen shot. Here is a little bit of bizarre for you: All 4 PSUs on the 2 SP20s were EVGA 750 Watt (all tested and working), swapped the two ones that were on the non-running boards with corsair 650 watt and everything seems to be up and running fine... So each SP20 has 1x EVGA 750 + 1x Corsair 650, and works. The 2 EVGA 750s that were not working on the SP20s are now powering other miners just fine... (que twilight zone music) There was no power to the DC2DC at time of miner_gate_arm start. My primary suspicion would be that the PSU was off, the connector was not inserted properly or the shortcut on the PSU motherboard connection was not good. Please try to make sure the PSU is running and the connectors are good, try to boot the units in bad configuration again and if you still get the problem send me logs (from webUI->"Settings tab"->"Get Logs"). Send to my mail "zvi@spond..." with reference to this post. Thanks for the reply Zvi, as they working fine now now with the mixed PSUs I'm not going to mess with them, but I did ensure cables were connected properly and the same PSUs are working fine on other gear now... |
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nhminer
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December 30, 2014, 01:25:03 AM |
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There was no power to the DC2DC at time of miner_gate_arm start. My primary suspicion would be that the PSU was off, the connector was not inserted properly or the shortcut on the PSU motherboard connection was not good. Please try to make sure the PSU is running and the connectors are good, try to boot the units in bad configuration again and if you still get the problem send me logs (from webUI->"Settings tab"->"Get Logs"). Send to my mail "zvi@spond..." with reference to this post.
Thanks for the reply Zvi, as they working fine now now with the mixed PSUs I'm not going to mess with them, but I did ensure cables were connected properly and the same PSUs are working fine on other gear now... I have experienced the same problem with an Antec 850; I think the sp20 overdrives it, the power protection cuts in; after 5 minutes it resets and starts again at a slightly lower rate. Does the SP20 do adaptive power management? |
BCH - 1EshwUEg9LRbY5WMSw7bkBGQUYQeenkcet
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samsonn25
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December 30, 2014, 04:44:24 AM |
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^This is really making a big issue over pulling an extra 50GH out of a unit - a value of less than $18. voiding warranty or buying a second $20 fan and spending the time to install it is not worth it.
At the peak speeds, any improvements you make come at the cost of about 1-1.2W/GH. Running at 1500GH uses approx 210W less than running at 1700GH. Unless you have very cheap power it will likely make sense by summertime to throttle back the hardware to improve the overall efficiency - or have heat problems.
I personally have 3 arriving this week that I hope to achieve ~1400GH/800W so that the fan can be kept at a reasonable volume. At $0.15/kwh it doesnt make much sense for me to try and get another 300GH/400W out of the unit, as the added hashrate gains are entirely spent on added power draw. Same reason as Ive throttled my SP10 units from 1400Gh to 1260GH to save 200W
Sorry @knlondike but you misunderstood me. You calculate with a fix price of the machine. Calculate cost and profit. I'm not speeking about the only 50ghs but when the weather gets warmer this will be 100ghs (from 1680 ghs) or more. At 20 pieces it's 2000ghs.... And i have room much more than 20.... I hope you unerstand why i'm trying to find some solution..... curious what you pay for power. I understand the aspect of clocking hardware to its limit if its profitable, but if you need to make >$10 in modifications to gain 50GH/60W per unit, plus have slightly more PSUs/TH it could be more practical to buy an extra SP20 for that extra 1.65TH/$500. If its a hobby to do modifications though thats another story Ok I'll give up... For me it's not hobby... It was a hobby with a Jupiter and some S1-s. Maybe would be practical to buy one more unit for sure. But I have a lot of high cfm fans and other parts laying around.... But at this point I give up. You don't know a lot of details so you can't make a judgement what am i do and why. But trust me, I have the reasons. So back to the original question. Any ideas to improve the cooling? Very strange, was a profitable hobby when the Jupiter and S1 were profitable, now the sp series are not. So now is unprofitable hobby/business |
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