Originally Posted by Davidsen
Whats the power usage on the 570 and 580, compared to a 6970?
Considering either triple crossfire or tri-sli.
Power usage is a bit more. Amd has all these tricks for idle and makes them sip power, but they are very intrusive imho. The 570/580 will draw more power but its not dramatic. A quality 850w unit can handle sli 570 or 580s, for three 570s you want to go with a 1kw+, and three 580s you can pull off a quality 1kw unit but I would recommend a 1.2kw unit for the extra headroom.
Originally Posted by blackbalt89
I'm not looking for uber cooling, just less noise lol. As long as it can keep the GPUs close to 70 under load.
Not sure if that's feasible with an OC on them though. :/
With a fullcover block, even with an oc, they should load ~50c as long as you have a good loop and fans. The pump is quiet but you can hear a small burble coming from it. Most likely with multiple case fans, you won't hear it all. I'd recommend the Rasa RX360 kit as that should be plenty. My 470s (all three) ranged from ilde @ 30c to loads @ 50-60c (the later was on a single rad, and the first on two 480s, see how much of a difference rad can make