Quote from: Kergekoin on December 15, 2013, 10:40:51 AM

Quote from: Lessaj on December 15, 2013, 01:45:51 AM

Quote from: Kergekoin on December 11, 2013, 05:01:16 PM

G1000 Powering 4x 280x and 2x 23cm fans with ease. GPUs @ 1080/1500. 2.95Mhs total.
The frame will be a closed case soon. Work in progress.
http://i.imgur.com/oraQLaW.jpg

How are you powering 4 R9 280x cards with only a 1000W power supply? I can't even power 3 with 1000W, the rig crashes. I think they pull over 300W each, especially overclocked. Need to upgrade to a 1300W supply.

Easy. This is G1000. One of the best 1000W PSUs on the market. I can run 1200W power draw from the wall with no problems what so ever. This PSU can deliver solid 1000W to the cards plus additional for the rest of hardware.
I ran my cards @ 1080/1500; 1.12v for a week and this miner took constant 1200W from the wall.
Since cards ran little too hot in my warm room, i reduced the load a bit and now im running 1030/1500; 1.08v. Power draw from wall is now 1065W. This means that those 4x 280x draw about 900W from PSU, which is around 220W-225W each.

1065W and 2.85Mhs = 2.67Hs per Watt. Keep in mind that this is for whole PC. Cards efficency is around 225W and 715KHs = 3.17Hs per Watt. Not bad eh? Cheesy

Maybe I just got a lemon PSU. It buzzes too. Anyways I'm returning it and getting a 1300W EVGA PSU instead, maybe I can get 4 cards on it.