I've been reading the posts and just thought I would throw my 0.0006369 BTC regarding temps, psu and hash speed... I use 1 HP Common Slot 1200W Server PSU with a Gigampz BB per SP20. I'm not concerned with noise and power is cheap. I am guessing that the spikes in the "last day" chart is the SP trying to auto correct for the PSU but I'm not sure. If anyone has some thoughts I'd welcome them.  try backing down the .77 to .75 yeah you may stay at 1600 but more stable show us this page see all of mine are 85c due to under clock if you have a lot of 120 or 125c you are just a bit too much overclocked  |
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mine is order 3974 I paid on 12/25
I am hoping for info on shipping soon.
It just became sunday in Israel
1:20 AM IST on Sunday, December 28
Order #3974 was paid too late on Thursday, it should be shipped today. The flight out is tomorrow (Monday) yeah I had the coins tied up I knew it was going to cost me a few days time for shipping. |
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Very nice. Incoming temp 11 C helps a lot with the cooling
yeah that 11 c is the key to staying over 1600gh to anyone that can do this (provide 11c temps) and has cheap power whynot |
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this page warms the cockles of my old heart  good to see BMT and SP-T discussing things and acting together. Well they should. I would say for more then the last 7 months they have been the best 2 companies out there. There should be room for the both of them. And miners can benefit from this. They are so far above : BFL KNC AVALON It really is not fair to put them in the same post with those 3 companies. They have sold some decent gear to many of us. Far more often then other companies. @ bitmain I am looking forward to the s-5 @ edgar I woke up this morning and see that maybe you will get some resolution with your issues. That would be nice. Some advice to both bitmain and edgar if the numbers are involved are 500 and 1000 just do 750 and then forget it. if the numbers are 400 and 800 do 600. I say this as a victim of bfl and bips and black arrow and I forgot the other one. 1)BFL finally refunded all monies 13.5 months later 2)Bips took .4 btc when btc was worth 1100 usd they never gave me a dime- it hurts to pay for my spondoolies with bitpay as bips became bitpay 3) black arrow via DZcoop grabbed 1300 in btc I was refund 600 in btc due to the drop in btc price---------very similar to your case edgar 4) another DZcoop deal went bust I have never got a dime back about 199 I gave up on Bips -Bitpay I gave up on That DZcoop deal The other 2 I call settled. Although the Bips-Bitpay still angers me as my funds were taken after the 1100 coin hack of BIPS and I have a timeline to prove that. |
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If you (anyone) were going to purchase an ATX power supply today which one would it be?
I may end up with a few S3s or SP20s, just depends on a few things, but I want to start scoping PSUs.
I have been drooling over at the Corsair website and researching about running 50% - some folks say 80% is better for quality and longevity.
Also, I'm not cheap, but I want to be smart about things, do I have to babysit ebay or is there somewhere I can pay an extra 20 and find good used, or what are your thoughts?
I like new better because of the warranty with things like ATX PSUs, there is a "known" failure rate, and I do not want to get one of those models. I understand in some situations int he crypto community everything is AS IS, but DOAs are generally covered right?
What about for miners?
Thank You
well evga 1300 g2 provides a psu trick switch with the miner. has a ten year warranty and runs 3 s-3's at freq 231 24/7/365 I would not say it is covered but the fact they give a psu short plug helps you to think they are covered. Somewhere there is a long discussion about this on this site. I own 7 or 8 evga 1300 watt g2 psu's and they all work so far. If one failed I would ask for a replacement. I don't really care if it has fine print since the short plug is a real piece of evidence to me that they allow the psu to run without a mobo. |
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There's been a sudden large increase in hash rate in the last week, after a previous drop.  What happened? Were some substantial hashing assets off doing Peercoin for a while, or what? well A)paycoin has fully stopped using hashpower B)sp20's have been shipping C) weather gets colder in more of the northern hemisphere = 'free' heat my 7 sp20's can not be cooled well if it is over 60f outdoors . but at 40f they offer 'free' heat this is about 100 usd a month for me. Many miners will run a borderline profitable miner for heat. |
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Something about this chip gives me the feeling that all mining will eventually go the way of underclocked ASICS. Its a lot less GH but its so much lower J/G.
yeah after I have run my sp20's from spondoolies and I get .47 at 1000 gh = 470 watts or .756 at 1620 gh = 1225 watts I think these will be the same hard to knock the power savings from underclocking |
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problem is its rated at 30A for a 100% duty cycle (like bitcoin mining is) so the S5 would pull more power than is available for most voltages. Bitmain says that 10A+ will be sufficient for 9V but i imagine that only applies to a single blade  12v/14 chips = 0.86V (stock is 0.8V?) 10v/14 chips = 0.71V or ~0.34w/GH or ~780Gh = 265W (26.5 A) 9v/14 chips = 0.64V or ~0.26w/GH or ~560Gh = 145.6W (16 A) plus, at 9V draw, the linked power supply is likely <~85% efficient so youll be drawing more power at the wall yeah I found I have enough on hand to fully test this. I advise no one to try it if they do not have the psu in hand. If I recall the 2 psu's I found are only 80% so savings are not much power wise. 9/12 volts is 75 percent less but an 80 percent power supply vs a 92% atx loses a lot of power example 600 watts x .75 = 450 watts / .8 = 562 watts vs 600 watts / .92 = 652 watts. So the savings of 150 watts because volt reduction of reduces to savings of 90 watts due to the psu lacking good efficiency . I will do testing because I have spoken with a member about an adapter for a psu like the evga 1300 g2. It would make the psu maybe go from 92 % to 87 % and give the same volt reduction to 9 volts.. This translates to 450 watts/ .87 = 517 watts which is better then the 562 watts possible with the cheap megawatt psu's All of this is theory not tested. So I advise all to delay buying the megawatt psu's for just a bit of time. So what's all the hoo haa about 0.2j/GH? these are all possible down clock ideas. the s-1 went from 180gh to 140gh and from 360 watts to 170 watts or 2 watts a gh to 1.2 watts so if the ideas being tossed about can work .. we may go from 1100 gh and 600 watts = .54 per gh to 950 gh and 400 watts = .42 per gh |
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Thanks for this great reply. I'm luckily in a place where power and cooling are being provided for free for the next year, so I'm not sure I'm going to underclock this first batch. That is okay if power and cooling are free run them in the 1500gh to 1600gh hash rate. Use fan speed 80 to 100. please understand that above 1600 gh needs a very cold room that is 50f or 10c fans at 80 to 100 and a good psu the evga 1300g2 . |
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mine is order 3974 I paid on 12/25
I am hoping for info on shipping soon.
It just became sunday in Israel
1:20 AM IST on Sunday, December 28
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problem is its rated at 30A for a 100% duty cycle (like bitcoin mining is) so the S5 would pull more power than is available for most voltages. Bitmain says that 10A+ will be sufficient for 9V but i imagine that only applies to a single blade 12v/14 chips = 0.86V (stock is 0.8V?) 10v/14 chips = 0.71V or ~0.34w/GH or ~780Gh = 265W (26.5 A) 9v/14 chips = 0.64V or ~0.26w/GH or ~560Gh = 145.6W (16 A) plus, at 9V draw, the linked power supply is likely <~85% efficient so youll be drawing more power at the wall yeah I found I have enough on hand to fully test this. I advise no one to try it if they do not have the psu in hand. If I recall the 2 psu's I found are only 80% so savings are not much power wise. 9/12 volts is 75 percent less but an 80 percent power supply vs a 92% atx loses a lot of power example 600 watts x .75 = 450 watts / .8 = 562 watts vs 600 watts / .92 = 652 watts. So the savings of 150 watts because volt reduction of reduces to savings of 90 watts due to the psu lacking good efficiency . I will do testing because I have spoken with a member about an adapter for a psu like the evga 1300 g2. It would make the psu maybe go from 92 % to 87 % and give the same volt reduction to 9 volts.. This translates to 450 watts/ .87 = 517 watts which is better then the 562 watts possible with the cheap megawatt psu's All of this is theory not tested. So I advise all to delay buying the megawatt psu's for just a bit of time. |
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dude . mining with current gear is not about overclock. I know drag. I did have the world's fastest mac mini's in 2008, 2009, 2010 according to geekbench and xbench. So I know the joy of overclocked gear. There is a goal for you to shoot at worlds best watts per gh. the sp20 can get into and around .45 watts a gh from www.spondoolies.comthe new s-5 can do ? from www.bitmaintech.com Although I believe it may give .42 watts a gh with an undervolted psu . Now if you do not want to make money and are willing to tear your gear up add better heatsinks for cooling, I suppose you could try to overclock. |
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Home miners will die last... at least the believers. I don't have a problem paying $50 to the power company to keep a couple of miners hashing. The big farms with huge bills are the ones to go first if price drops significantly.
miners like me in a cold winter area get heat benefits that big farms do not get. A drop in usd to btc has to slow us back into the negative numbers. It has to shut some big farms down. For some of us the winter weather is huge. No ac bills to cool building, and can use cheap setups to extract heat. Allows less overhead. I am allowing 3600-4000 watts of heat to just stay in the home. most of it is in the attached garage which is under my bedroom heat Drifts up to the bedroom as if I have in floor heat. 3600 watts = more then 10000 btus of heat. I estimate my heating bill to be reduced 100 a month in ½ Oct., NOV., DEC., JAN., FEB., MAR., ½ Apr So 600 bucks reduction Late Apr and May I usually cut my power use down to 2000 watts. |
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Home miners will die last... at least the believers. I don't have a problem paying $50 to the power company to keep a couple of miners hashing. The big farms with huge bills are the ones to go first if price drops significantly.
miners like me in a cold winter area get heat benefits that big farms do not get. A drop in usd to btc has to slow us back into the negative numbers. It has to shut some big farms down. |
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Righto, thanks. I doubt anyone goes out of their way to trust my opinions, but I really like Bitmain gear (for disclosure, I own about 15 undervolted S1, run an S2 Kit and an S3) and I can't recommend the S5 until I trust a few things have been taken care of. It'd be really nice to have gotten ahold of one of those evaluation units, but then a thousand other people could say the same thing.
the big fear is will behave like Asic Miner"s tube or prisma. I owned both of them and both had current/heat runaway problems. very hard to keep stable. Once I get the test module I can A) undervolt it with 1 psu. B) over volt it with another psu. C) volt it perfectly with a high quality psu. D) sent 11 volts to one board and 13 volts to the other board. using 2 different psu's E)Set a low freq F) set a high freq G) add the higher quality silverstone fan for cooling The s-1 and s-3's I have had were all good or very good. 1 dead ethernet and all else good out of 30-35 units. I have read problems on the s-2 the s-4 the c-1 but I never had one of them to testThank you Sidehack and Philipma1957 as I respect both of your opinions. I did order one S5 from batch 2 to try and will be interested in your testing. I also would like to know what PSU you use to undervolt the miner. +1 These psu's are not for pc's but if I drop volts to 10 and wire correctly they may allow for underclock. the s-5 would be a true beast if it takes 10 volts drops to 900gh, but the watts drop to 400. thus making it a .44 watt per gh miner that is truly quiet. I think sidehack could tell you if a hp2000 watt server psu can adjust lower in volts http://www.ebay.com/itm/MFJ-4245MV-45-Amp-Switching-Power-Supply-w-3-Yr-RW-Antennastore-Warranty-/151492006605?pt=US_Radio_Comm_Device_Power_Supplies&hash=item2345a092cdhere is another psu with volt adjustment wrong > http://www.meanwell.com/search/SD-1000/SD-1000-spec.pdf <wrong 11 to 15 volts and if set at 11 would sag to 10.0-10.5 on the load of the s-5 this one should work > http://www.ebay.com/itm/Professional-Mean-Well-SE-600-12-PSU-AC-DC-Switching-Power-supply-12V-50A-600W-/151411792018?pt=US_Radio_Comm_Device_Power_Supplies&hash=item2340d89892http://www.meanwell.com/search/SE-600/SE-600-spec.pdf specs say 10 to 13.5 volts if you set to 10 it will sag to 9 and change |
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Thanks everyone
I have them running and the cables are warm to the touch, but not hot.
you can always drop from freq 250 to 243 to 237 to 231 to 225 with each one looking for the sweet spot in terms of warm cables. based on the info you gave us I would go 1 freq lower then what you have right now. |
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@ Fatman3001 I crunched sales numbers a little more from 12-22 to 12-26 and I believe at least 400 to 600 s-5's have sold and paid to that addy I posted above.
Thanks, it will be interesting to see what it looks like when these machines hit the network. Do you know if they use other addresses? Yes. I paid to a different addy. I ordered within 15 min. Expecting a tracking # tomorrow. I'll try to post... trace your addy forward and see if it leads to the addy I gave above. I can only find the one big one now. but that does not mean they do not have more big addy's. they used to have quite a few really big addys 3 I think. When they did the s-3's I found batches 1, 2 ,3 each sold 2000 s-3's |
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