I'm using a keyboard and a mouse, both of them previous to installing my powercolor ati 9600 never gave me any trouble in games. My mouse is Usb and optical, as for my keyboard its ps2 (none of them wireless) and has a multimedia keys (if that matters). They were the cheapest ones I could find
I have just formated my computer (ence my late reply :P) and it looks like that situation is better, but on tombraider legend, lara doesnt seem to be able to keep up with my commands (women...) after a few commands, I can take my hands off the keyboard and mouse and watch her do movements and looking around. I also tried reducing graphical detail on the game and no luck, still the same problem.