Bought a used GTX 580. Got a good price on it in the 180-200 range. I couldn't get anything that would fold as good as it in the 200 range.. The 660ti and 7950 are all up in the 300 range. Thing eats a lot of power 400-450watts though which is a negative thing. I can probably be hitting 600watts very easily with the 965 black edition going full speed ahead. Will be jumping into nvidia projects on the GPU soon for team anandtech. Right now have CPU folding einstein, SIMAP, and a couple other projects on 3 outta the 4 cores.