I'm very new to folding. Like, I heard about it a couple weeks ago and here I am. It seems that Nvidia GPUs are better for folding, and I have an old athlon ii x2 linux rig sitting around. So basically, I'm looking for a cheap yet somewhat efficient/effective folding GPU. Some that I'm looking at are the GT 440, GT 550ti, 9800GT, GT 630, etc. Do any of those, or something else, pop out at you as being a good fit? I know which ones I would pick for gaming, but I'm not so sure when it comes to folding. Thank you.