fighter25, you have an HX650 powering 2 GTX 480's and an i7 @ 4.0 cooled by a 92mm Xiggy?
I dropped in your specs on the eXtreme PSU Calculator and it came up with 925w as the required voltage for your system at 100% load with 10% capacitor aging. That's actually without calculating the CPU fan power, but that's negligible. What can't be overlooked is that you're going to be doing water cooling which would, unfortunately, draw even more power.
I thought you were pushing it when I saw the picture so I double checked with the calculator and sure enough I was right.
I think I'm going to keep my Vulcan, but I'm returning this one due to its defects.