Yeah, I think you'd need at least 350, if not 400 for something in the 7600-7800 range. My desktop has 2 PSUs, one at. . .I think 320 and the other at 200 or so. Because of the staggered approach, it's as if it's a bit more powerful than the numbers added up, but it's difficult to really compare it to things and know if something will work in my system.