I'm looking at getting a GTX 570 and I'm a little worried about my power supply not being able to handle it. Right now, I've got a 630W, and it says I only need a 550W on Nvidia's site. I'm still a little skeptical because I plan to max out all my games.
it's not a great PSU, i would avoid raidmaxx PSU as they are not known to be reliable. I doubt that unit can even peak at 630w, much less continuously provide that power. It actually has a single 12v rail (as most PSU do) that has been split (its common). The PSU does not state the power provided by the 12v but I doubt it is above 40a or that the PSU can even provide that power. Here are some budget PSU i would look at if you want to upgrade (i would if I was you).