Originally Posted by Minnetonka16
I have an antec EA650 right now and they artifact like hell on idle, no reason not to get at least a 750w.
I doubt it's the PSU. Again:
With two GTX 570s under full load in their system, their PSU pulled 578W from the wall outlet. Their CPU was idling, so I have to add 150W for that, and so adding that to the two 570s makes the PSU pulling 728W from the wall outlet. So, if the PSU is 85% efficient while pulling 728W from the wall outlet, then that would mean the system is only pulling 618W from the PSU. Of course, your power draw while gaming would only be around 525-550W. So if you have a 650W PSU that can continuously deliver 650W (like the EA650 Platinum Series), then you have enough power.
Your idle power draw is much too low to even come close to saturating your PSU.
Edit: 578W + 77W x 0.85 (for 85% efficiency) equals 556.75W. Your gaming power draw will be closer to about 500-525W.
Edited by TwoCables - 3/1/13 at 5:48am