whiskeycritic - 175%
686 draw, 1200 watt psu.
Bought the psu when I was running Phenom II and 2 GTX580 3GB. Moved to i7 3820 and 2 GTX680's and my power usage dropped over 200 watts.
Yes, it's possible. It's a little different than overclocking by multi, but there's a great guide here on the forum. I get about 37C-38C idle, 70C-73C at %100 load at 4.625ghz, 1.32v with an H100. Room temp is about 21C. My sig rig draws...