New PC

[Megasteve]

Yeah, 900w is overkill unless you're running SLI. 750w would be sufficient, just make sure whatever you're getting can put out the amperage required for the card. The 5xx series takes like 34amps(lolspaceheater). One of my co-workers just grabbed a 750w corsair and an EVGA 560 and everything runs sooooooo good.

[Yooxra]

What they said pretty much. CPU, GPU, DDR3 are the main things to make your machine and it's gaming owner a happy camper. Go with the 560.