I'd like to upgrade my processor, AMD Athlon 3600+ 1.92 GHz Dual Core, and i'm interested how much improvement in games would i get if i buy AMD Athlon II X4 640 (3.0GHz,2MB,95W,AM3) . In same games on higher settings i get about 20 fps( Skyrim, witcher 2, gta iv,...), and i don't want to end up buying new processor for about 2-3 fps improvement.
upgrading your processor is a good idea and will be worth while but i'm not sure how much of an increase there would be.