Well, AMD's are useful for both.. They are more responsive and have higher fsb speeds, but are slower than most new Intel processors in 32bit mode, which would maybe be a disadvantage with 32 bit programs and games.. If you get a 64bit processor, you should also get the 64bit windows, but I would think you should go with the AMD processors, cuz many other ppl think so too(e.g.: 32 bit processors have max of 4GB mem for OS and programs; 64 bit ones have 16 billion GB available (in 64bit mode) .. I read it off some site about 32 and 64 bit cpu comparison).. But that's up to you, cuz you have to find a new video card if you want the AMD as you said