Re: ANTMINER S3 Discussion and Support Thread.

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I wouldn't be so sure. I think they can squeeze 2 TH/s out of 1100-1200W.

2000G * 0.7W/GH = 1400W MINIMUM...OK... Huh

The assumption is that the S4 works with underclocked/undervolted ASICS to reach a better W/GH ratio, I would assume somewhere between 0.55 and 0.65 W/GH, so one 1300/1400W power supply could indeed do. But of course we'll not know for sure till @BITMAIN reveals the exact specs.

still, they wont give you something like
Evga 1500w Platinum Cheesy

and, btw...
5units of S3+ = 355w x 5 = 1,775W

i assume S4 will be around 1500w - 1700w
they wont waste chips like that..
they better selling chips like avalon do than planting so much undervolted chips
and sell it so damn cheap Grin

they're not doing charity here buddy Cheesy

You don't need an "EVGA Platinum". You need a good, high efficiency server power supply, and you for sure don't need 1500w to power 2TH. A server class PSU will beat the pants off of any consumer model at any time.

You will get higher efficiency out of a server-class PSU, and even better if you're running on 240v instead of 120. Take a look at the SPTech specs for their servers, and do the math to see what they're pulling, and they're doing it at 90+ efficiency. The one thing I'll give SPTech is that they are built well, using (supposedly) higher end server grade parts.

By undervolting you achieve several different things. Yes, you lower your hashrate, but you also lower power draw significantly, lower heat generation, and raise efficiency which allow you to get higher numbers with much more stability. The ASIC chips themselves are cheap, they're only "wasting" a few bucks by having to add a few more when undervolted. Seriously an extra hashboard to them is probably $50, so when you're dealing with a $1000 server that's really not much at all.