Hey, I have an Athena 550w PSU lying around, since I moved to a 750w. I have used it with a 7800gtx, 7900gtx, and 7950gx2/dual-core, etc. so it'll power anything you have. It was always a great PSU, but when I bought a 8800gtx, I was wanting to make sure I had enough juice for it so I bought a Thermaltake 750w Toughpower…