Noobie

nonsense, you don't need 600 watts just for a 4650, a 4650 alone uses about 50 watts. You could live off a 250 watt psu. 650watts can power 2 5870s, i7 @ 4ghz, 12gb ram and like 10 harddrives. http://www.newegg.com/Product/Product.aspx?Item=N82E16817182202 is a good power supply, same platform as the corsair vx450. It has a single 31 amp 12 v rail which could power a 5870