Yes, it works in America. However, you need access to 208 to 240 Volts instead of 120 Volts. This would be a 2 poll breaker in the Main Service Panel and a minimum of 20 amps with 12 AWG wiring. If 2 poll 30 amp breaker, you need 10 AWG wiring. I don't think you are going higher than 30 Amps if you are installing a 240 volt outlet for the BMT 1600 watt PSU if you are in your home. I would suspect if you were in a data center, you would not have asked this question. 240 Volts is the way to go. You can run twice as many rigs than you can with 120 Volts. If you don't know what you're doing with electricity, get some help locally. Could easily get away with a 2 pole 15A 240V breaker and 14GA wire if all he wants to power is 1 or 2 bitmain PSUs. If more, 30A and PDU. I agree. We just don't know if he's comfortable taking out a single pole 15 amp and replacing it with a 2 pole 15 amp. He might need to use a tandem breaker to make room in main service panel. He would have to make sure no other NON-240 Volt devices are plugged into the circuit to prevent potential fire. It would be best to have a dedicated circuit made just for the rig with its PSU. It's quite common for circuits to be looped (in a string) for receptacles (outlets), switches and lighting. I would be concerned about other devices connected to this circuit that would not handle the pressure of 240 Volts if someone were to accidentally plug a device not made for 240V at another outlet on the same loop as the circuit he upgraded to 240V. It's best IMHO to make (create) dedicated 240V circuits just for the mining rig(s) and PSU's to avoid possible fire from circuits plugged into looped outlets on the same circuit that were designed for 120 Volts. I've never tried plugging in a lamp [designed for 120V] in an outlet that was upgraded to 240 Volts. I have no idea what would occur. It may be you have experience with this and had no issues. I can't elaborate on that cause I really don't have experience. However, I'm usually one to go by the specifications laid out by the manufacturer of the appliance or light lamp. If the specifications state 120V @ 60 Hz with no mention of 240 Volts, I keep it only in 120 Volts. That's just me. Maybe I should check it out some time to see what would happen. However, I think I would run a line outside to the driveway to see what would occur as a precaution. |
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Yes, it works in America. However, you need access to 208 to 240 Volts instead of 120 Volts. This would be a 2 poll breaker in the Main Service Panel and a minimum of 20 amps with 12 AWG wiring. If 2 poll 30 amp breaker, you need 10 AWG wiring. I don't think you are going higher than 30 Amps if you are installing a 240 volt outlet for the BMT 1600 watt PSU if you are in your home. I would suspect if you were in a data center, you would not have asked this question. 240 Volts is the way to go. You can run twice as many rigs than you can with 120 Volts. If you don't know what you're doing with electricity, get some help locally. |
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I just believe if and/or when 14/16nm chips are available in rigs, they will be quite pricey.
They are taking preorders and have a price for bulk buyers “The miners are now available for pre-order at a price of 0.87 BTC with a minimum order of 333 miners which is 1 petahash,” Virgilio Lizardo Jr., Head of International at Bitbank told Bitcoin Magazine in an exclusive interview. “This price will be available until November 11, 2015. This winter, the miners will be available with no minimum order required; the price at this time has not been decided yet.” https://bitcoinmagazine.com/articles/bw-to-launch-nm-chip-and-miner-for-general-population-1445278227For whatever reason, I got to thinking about this article saying the following: “BW will produce the amount needed [in the first batch] to reach our goal of 48P [petahashes] per month at our newest mining farm currently under construction.” I find that rather hard to believe. At 3,500 GH/s per rig, that would be 14,000 rigs manufactured each month to achieve 48,000,000 GH/s (48 PH/s). And then, they want to sell to other people as well... in addition to what they will put in their newest mining farm currently under construction?  I honestly believe that was another typo. I believe they meant to say 4.8 PH/s instead of 48 PH/s each month. Also, could you imagine the size of a facility that has 14,000 rigs dumped into it EACH MONTH? The article sounds completely ridiculous to me or it's just full of a lot of errors. If it is in fact an error, 4,8 PH/s each month with 1,400 rigs sounds more obtainable than 14,000 rigs while also selling to others outside of BW. |
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dmwardjr,
what is your pool(s) of choice sir?
For me nicehash, f2pool, antpool
My apologies for the delay. I've been chatting on tradingview.comI have mine set up in the following order: Slush Kano Antpool I know Kano pool is not the best choice with it being N500 for the occasional drop in if Slush drops. But something is better than nothing. Also, antpool's luck has been terrible as of late. I would have Kano first if more miners would point there rigs over there. But, it's not happening for whatever reason. With it being at N500 may very well be the reason. Not quite sure. Slush stats: 114% for the Day (last 24 hours) [8 blocks thus far today] 105% for the Week 101% for the Month Thanks for the info. Have not tried Kano yet. Will probably give it a spin. I have one miner that has found 15 blocks in 1d 9h going against nicehash. Too bad have to share. Mine currently are Nicehash USA Nicehash Europe F2pool That miner is officially a super miner. I've been up ALL NIGHT... It is now 8:26am Central Time.. I must get some shut eye. Probably will not get up until later this afternoon. Have a good day, all... |
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dmwardjr,
what is your pool(s) of choice sir?
For me nicehash, f2pool, antpool
My apologies for the delay. I've been chatting on tradingview.comI have mine set up in the following order: Slush Kano Antpool I know Kano pool is not the best choice with it being N500 for the occasional drop in if Slush drops. But something is better than nothing. Also, antpool's luck has been terrible as of late. I would have Kano first if more miners would point there rigs over there. But, it's not happening for whatever reason. With it being at N500 may very well be the reason. Not quite sure. Slush stats: 114% for the Day (last 24 hours) [8 blocks thus far today] 105% for the Week 101% for the Month |
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That $366 tax in customs is possibly a deal breaker. I'm curious, how much is your power costs converted into U.S. Dollars (USD)? |
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I personally believe more "true" S7's we become available soon. They have no problem at all selling them. The S7 is a prime piece of hardware! They might also create another one with lower hash rate. However, I believe the S7 is here to stay for a while. It may very well go into 20 batches at a minimum.
Agreed, and even the BW offering, WERE it available, is not super compelling given the likely timeframe for delivery. The pre-order is $80k and that's a little rich when dealing with an unknown company. I had high hopes for the SP50 when announced, but no further information to us 'home' miners.
With all due respect to those in the thread who are either still waiting on miners, or having problems, these are excellent machines, and I wish we had purchased enough to replace all units in our farms on day one instead of waiting on delayed shipments and now uncertain if more true S7's will become available for sale.
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Sounds like they may be releasing it to compete with the Avalon6 that is suppose to come in at 3.5 Th and $310/Th. Specs can be found here: https://en.bitcoin.it/wiki/Avalon63.65@1100w at the wall? I'll take the S7's 4.86@1185w measured at my wall At 310$/TH yeah, thats not great. Need some sort of incentive to go for them instead of sticking with Bitmain at the moment. The format seem more interesting than the S7 but Its definitively not worth the step up from S5 to Avalon6 at that price. I agree totally! At 0.314 watts per GH/s if running at 3500 GH/s. Not interested... |
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Sounds like they may be releasing it to compete with the Avalon6 that is suppose to come in at 3.5 Th and $310/Th. Specs can be found here: https://en.bitcoin.it/wiki/Avalon63.65@1100w at the wall? I'll take the S7's 4.86@1185w measured at my wall If we do the math at 1100 watts divided by 3500 GH/s [It did say +/- 10%], that comes to 0.314 watts per GH/s verses the 0.25 watts per GH/s of the S7. |
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hey wolfen - yes i put my hand at the back and it stopped whistling..... I think the fan is just sucking air too strongly.... any ideas how to cure this permanently?
haven't done the 600 upgrade yet, mine is stock 575 but running very stable.
Everything was quiet for about 5 or 6 hours when I got all nine of them going. Then, I had one do it for about 5 minutes before I went downstairs to loosen the screws a bit on every rig cause I could not tell which one was making the noise. After about an hour or so the noise stopped. So, if the screws on the fan had anything to do with it, I'm not sure. It's been a week now and the noise has never come back. |
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I just believe if and/or when 14/16nm chips are available in rigs, they will be quite pricey.
They are taking preorders and have a price for bulk buyers “The miners are now available for pre-order at a price of 0.87 BTC with a minimum order of 333 miners which is 1 petahash,” Virgilio Lizardo Jr., Head of International at Bitbank told Bitcoin Magazine in an exclusive interview. “This price will be available until November 11, 2015. This winter, the miners will be available with no minimum order required; the price at this time has not been decided yet.” https://bitcoinmagazine.com/articles/bw-to-launch-nm-chip-and-miner-for-general-population-1445278227I just got back from Five Guys & Fries. Thanks for the link. I'm going to check it out. |
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just a weekend there, we will probably see new batches on Monday or even sunday pm.
It's possible we could see Batch 4 and possibly Batch 5 with it as well on Monday. However, new batches may not be available until Friday of next week. I think they would rather be more prepared to ship orders out within the time frame they specify to improve customer satisfaction and to relieve pressure of meeting deadlines. However, I'm not there and I cannot see what they have or have not done.
If bw will really produce something in winter time, BMT will be pressed to accelerate the 14/16nm rollout.
I don't believe they would feel hard pressed. I think the mark up with the price of the S7 may be quite considerable in relation to actual costs. Which means, they would still have room for price adjustment if they desire. It all depends on the price of BW's gear IF they actually sell it. Miners will be calculating ROI on rigs made available by multiple suppliers and will purchase which ever rig they deem as more viable for their situation. Again, this was only speculation on my part. Thank you your insight sir. Received several s7 b1, configured in my kitchen and took over to datacenter. All running 4.8 excellent. Only problem I had was one corsair psu did not start so I was hashing with just one board on one. Replaced psu and fixed. Bitmain psu's working great.(just have a few) Was easier to install in the rack when I attached the cables to the s7 first and then to the corsair. Your welcome. I just believe if and/or when 14/16nm chips are available in rigs, they will be quite pricey. They should be able to get 0.06 to 0.12 watts per GH/s more than likely. Which means they would last quite a long time in regards to being able to reach ROI. 14/16nm chips aren't as cheap compared to 28nm chips either. It may also be a more expensive assembly process of the blades. Investments may need to be made for new equipment within the assembly process which drives up costs. I'm saying all of this to emphasize the price of 14/16nm rigs will probably be quite expensive compared to the S7. They could make rigs with less hash rate that are more affordable though. Only time will tell. The S7's 0.25 watts per GH/s is still quite good to last a while before the difficulty gets out of hand. I say this because it is my belief the price of bitcoin while rise to a higher percentage than the difficulty between now and the end of June, 2016. I still believe we may have a similar episode with bitcoin like we had with litecoin this past July [The ole pump and dump]. However, when LTC dumped, it's price after dumping was considerably close to double what the price was in the month of May before the pump began. Also, I've been seeing a lot of great news lately that tells me we will have a lot of BIG money coming into the fray soon. [Through Gemini Exchange and Winkelvoss twins ETF that may come on line soon.] I honestly believe from now until the block halving will be a great year for bitcoin mining. |
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just a weekend there, we will probably see new batches on Monday or even sunday pm.
It's possible we could see Batch 4 and possibly Batch 5 with it as well on Monday. However, new batches may not be available until Friday of next week. I think they would rather be more prepared to ship orders out within the time frame they specify to improve customer satisfaction and to relieve pressure of meeting deadlines. However, I'm not there and I cannot see what they have or have not done.
If bw will really produce something in winter time, BMT will be pressed to accelerate the 14/16nm rollout.
I don't believe they would feel hard pressed. I think the mark up with the price of the S7 may be quite considerable in relation to actual costs. Which means, they would still have room for price adjustment if they desire. It all depends on the price of BW's gear IF they actually sell it. Miners will be calculating ROI on rigs made available by multiple suppliers and will purchase which ever rig they deem as more viable for their situation. Again, this was only speculation on my part. |
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Bitmain is all sold out of all S7s Batch 1, 2, and 3.
SPECULATION (without any facts)
Is there an introduction of a new product? Maybe with the new chip.
Are they releasing the new S7+
Are they now trying to catch up?
Are they freezing sales to avoid loss with the increased BTC value?
Just Saying
Getting caught up, IMHO. IF an S7+ were to come out, that would not stop them from making the S7, IMHO. I do not see a new chip (14nm or 16nm) coming out until possibly this time next year, IMHO. I personally do not feel they are freezing sales. If the price of bitcoin continues to rise, they could simply continue sales while increasing the price of the S7's in proportion to the rise in bitcoin price and difficulty to continue making profits. |
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2.5 S7's on each 2880W PSU would be pulling 2,825W, or 11.77 amps. The problem is you can't divide 5 S7's (15 hashboards) evenly, so one PSU would have to take on ~3,013W (12.55A @ 240V), and the other ~2,636W (10.98A @ 240V). If you want to power 5 S7's I would suggest running a single hashboard from one of the S7's on a separate PSU (should draw ~377W DC), leaving you with 7 hashboards + controller for each 2880W PSU's loaded @ 91-92%. Better for longevity and efficiency, and almost all of us have small PSU's kicking around somewhere.
Plus, since the 2880W boards have 22 PCIe connectors, it's enough to power all 3 PCIe ports on all 7 hashboards + the controller.
Thanks for the additional brain storming for me, Finksy. I do have 9 x Corsair AX860 PSU's along with the 20 x IBM 2880W PSU's. I don't need all 20 x 2880's yet. That will not begin until December. So, I believe I will plug in 1 x 2880W and 1 x AX860W PSU in each of the 15 amp legs of my 30 amp PDU's to be able to power 5 or 6 x S7's. EDIT: So, I believe I will keep it to 5 x S7's at 600 MHz stock frequency per PDU instead of 6 x S7's under clocked at 575 MHz. That would be configured the following way for each 15 amp leg of the 30 amp PDU: 1 x 2880W PSU powering 2 controllers (20 watts) and 7 blades (2800 watts) and an AX860 watt PSU powering 1 controller (10 watts) and 1 blade (400 watts) on one of the 15 amp legs of the 30 amp PDU for a total of 3230 watts (13.46 amps). Then have 1 x 2880W PSU powering 2 controllers (20 watts) and 7 blades (2800 watts) for a total of 2820 watts (11.75 amps) on the other 15 amp leg of the 30 amp PDU.Thanks again for the brain storming. EDIT: I know the blades are actually 377 watts each instead of the 400 watts I stated when rounding off and the controller is probably a bit more than the 10 watts I stated. Anyone have any idea about how many watts the controller is? |
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he said 2 of them can do 5 s-7's
so if each s-7 pulls 1200 watts 5 x 1200 = 6000 so the psu needs to do 3000 watts.
I would be willing to guess based on my testing 5 s-7's set at freq 587 would do under 5760 watts psu needs to do 2800 watts
so yeah I think you could do 5 at freq 587 or less.
the savings in psu's on 50 s-7's would be 50 x amtminer psu vs 20 x 2880 psu
even if you got say 4840 on all the antminer psu driven s-7s'
and only 4740 on all the 2880 watts psus.
the savings in psu cost would make up for it.
Thanks for clarifying that he said 2 x IBM 2880's and not just one (1). Here was my dilemma: My 240V/30A PDU's have two (2) 15 amp breakers built into it. The maximum amount of amps I've been able to go on one of the 15 amp legs of the PDU is 17 amps without the 15 amp breaker on the PDU tripping. After thinking about it... I still cannot do 3 x 2880W PSU's on the 30 amp PDU's. 2 x 2880W PSU's would have to be plugged into one of the 15 amp legs of the PDU. Which means one of the 15 amp breakers built into the PDU would trip all the time and would not be able to power the 3rd 2880W PSU. See my dilemma? This is why I was mentioning buying the BM1600W PSU's to go along with IBM 2880W PSU's while being connected to 2 x 15 amp legs with breakers built into the PDU. Now I'm wishing I had 40 amp or 50 amp PDU's. Here are the PDU's I have: http://www.tripplite.com/metered-pdu-30a-208v-240v-0u-vertical-c19-c13-outlets-nema-l6-30p-single-phase~PDUMV30HV/ |
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I do not think reward halving will have impact on S7 price. Tooo much time until that...
I would have to agree with you on that one to an extent. That's the only thing I could come up with for the price reduction between batch 1 and batch 3. I think the key is it will not yet. But once we hit say 6 month's, then 3 months etc no doubt it will effect it. With less reward people would not spend as much. But we really don't know a lot of what will happen at halving we need to know to determine miners price. BTC price at halving will affect miners price greatly, and no one can tell us what that will be currently.. Agreed, we don't know what will occur with difficulty and btc price. I plan on buying more every month. I'm not saying how many each month but it will be quite a bit. I plan on buying ten of their 1600 PSU's as well. The way my PDU's are set up, I still have more watts available on each PSU for more S7's. I would rather do this with BITMAIN's PSU's than use an IBM 2880W PSU to power only one S7 when it can easily power two. It would be a waste to do this with an IBM 2880W. Hence, the need for BITMAIN's 1600W PSU. I've been up all night. It is 5:39am at my location now. It's past time to get some sleep. Good night everyone! I must be missing something, so power 2 with an IBM 2880W PSU if that is what you can do, heck power 5 per 2 IBM 2880W PSUs. You have lower cost, and better efficiency than Bitmain PSUs, I am not understanding the logic since you make the point you can power two per PSU. Sounds like I'm about to learn something... You mean to tell me I can run more than two S7's with an IBM 2880W PSU  I assumed it can do about 3200 to 3300 watts max. So, I can actually power 5 of them safely? |
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I do not think reward halving will have impact on S7 price. Tooo much time until that...
I would have to agree with you on that one to an extent. That's the only thing I could come up with for the price reduction between batch 1 and batch 3. I think the key is it will not yet. But once we hit say 6 month's, then 3 months etc no doubt it will effect it. With less reward people would not spend as much. But we really don't know a lot of what will happen at halving we need to know to determine miners price. BTC price at halving will affect miners price greatly, and no one can tell us what that will be currently.. Agreed, we don't know what will occur with difficulty and btc price. I plan on buying more every month. I'm not saying how many each month but it will be quite a bit. I plan on buying ten of their 1600 PSU's as well. The way my PDU's are set up, I still have more watts available on each PSU for more S7's. I would rather do this with BITMAIN's PSU's than use an IBM 2880W PSU to power only one S7 when it can easily power two. It would be a waste to do this with an IBM 2880W. Hence, the need for BITMAIN's 1600W PSU. I've been up all night. It is 5:39am at my location now. It's past time to get some sleep. Good night everyone! |
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I do not think reward halving will have impact on S7 price. Tooo much time until that...
I would have to agree with you on that one to an extent. That's the only thing I could come up with for the price reduction between batch 1 and batch 3. |
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