Quote from: Singlebyte on June 19, 2013, 09:19:24 PM

Quote from: zackclark70 on June 19, 2013, 09:12:15 PM

Quote from: Singlebyte on June 19, 2013, 09:09:12 PM

Quote

i run 3 cards on a 750w psu ( 700-725w at the wall )

That's easy...some cards only pull 15watts!

The poster I was referring to was running 3 7950s (underclocked).

If he was running these under load (scrypt mining/over clocked) he would not be able to run them with a 850psu. Additionally he would be burning a lot of wasted power because of the efficiency drop.

sorry i ment to say i have 3 7950s runing at 630kh each

edit 1050 core 1250 ram 1.050v core 55% fan

Oh, ok. That's quite good.

But you still would be at (or near %) capacity of psu which kills your power efficiency. You must also be running other low draw hardware (like ssd/lower mem/ semperon/Ect). Like I said it depends on a ton of factors. And every online calculator I have seen would recommend a larger psu for those 3 cards.

Edit...re-read your post...you are at about 97% of capacity.

that rig is a 1090t cpu 256gb ssd cpu watercooling ( 25w waterpump ) 6 120mm fans 8gb ddr3 1600and a led monator lol have a look at it its my card testing rig / gaming rig lol
http://s1315.photobucket.com/user/zackclark70/library/#/user/zackclark70/library/

edit its a hx750 psu so max it can pull from the wall 850w ( at 90% efficiency )

edit croshair iv motherboard