850w psu good enough for Tri-Fire 6970??

Right now im using the Corsair Enthusiast Series 850TX. Its a great psu and rated 80+

Currently its running 2x 6970 and its going great; however, I have a 1440p monitor on its way. My xfire setup runs everything fine right now, but i like to mod my games to hell and back. Add in the added stress of a higher res and that has me considering an additional 6970 to add to my setup. Right now i can get a 6970 for $310 ($290 after rebate). If i need to buy another psu then its not worth it. I might as well cut my losses and wait until late 2013 to upgrade again.

Ive read that each gpu pulls 207w under load. I want to do a mild oc (940 core and 1450 mem) no voltage increase. Will I have issues??

Problem is not wattage its pci-e connectors and the 12v rail . You will need a 1000w psu to be safe and have to some headroom and enough pci-e connectors. Two 6970's 800w psu is recommended , three is 1000w+

I had suspected such. Thank You!

you could sell both and buy a 7970 :D of course that would cost you big time.

It depends a bit on what CPU you have and how much it s overclocked, you could probably run trifire 6970s on that unit but you will be pushing it to the very limits. I would honestly not recommend it.spittis

FWIW, Tweaktown reported a ~710W load power consumption when using a 2600K @ 5.2GHz paired with a trio of 6970's. They don't make it clear if they factored in the power supply efficiency though:?

i have a 2500k @ a little over 4.3GHz currently

i have a 2500k @ a little over 4.3GHz currently

CorpseExecutor