Quote from: booradlly on August 09, 2014, 06:42:05 PM

Quote from: klondike_bar on August 09, 2014, 03:23:12 PM

Quote from: Master One on August 09, 2014, 03:00:08 PM

I'm thinking of buying 3 or 4 Antminer S3, but right now I'm puzzled about getting proper power supplies for these.

Such EVGA 1300 G2 is quite pricey, are there any cheaper alternatives?
Can 3 Antminer S3 be powered by a single EVGA 1300 G2 without problem?
When overclocking 3 or 4 Antminer S3, how do you solve the power supply issue with 4 power connections each S3 (since a EVGA 1300 G2 only comes with 6 cables)?
What's the power draw of an Antminer S3 when running at 250 MHz?

1) yes - but generally it would mean using a server power supply which is louder and less friendly to use in a small setup. THE EVGA 1300 is a great unit at a good price
2) yes, even at ~380W each you are left with over 150W of overhead capacity on the 12V rail
3) either get a good quality splitter or just use 2 connections per unit. AFAIK using all 4 connectors doesnt provide much realworld benefit but might be slightly safer for the pcb traces
4) closer to 380-400W

Ok, see this seems to be going against earlier theories in the thread, but this at least makes sense. With a power draw of 400w or less, I would think we could use the same power setup we had for overclocked s1's. I.E. only TWO pcie cables. But other people have STRONGLY recommended using 4 pcie cables when overclocking the s3's. The reason they give is decreasing the power draw on the pcie cables. Makes sense, but this implies we have been near melting our pcie cables with the s1's for the past couple of months. What gives ?

Even if overclocked to 250Mhz, 1 PCI power cable per blade is just enough.
But its strongly recommended having 2 PCI power cable per blade.
The system will be more relaxed and the wire temperature will be much better.
Cooler wires will give less power loss, even though its not much large.