I have a AMD Athlon 64 X2 5600 2.9 GHZ. My current video card is a 9800GTX 1GB. I run games pretty well, but not as well as I would like. Would an upgrade to a 460GTX be a large improvement, or will my rather old processor bottleneck it to a point where I won't notice the upgrade?
650W Power supply
1TB HD 7200