I hate FPS below 60 and i can tell, i upgraded from a ATI mobility 9000 IGP graphics to an X1900XT.
THe human eye can see well over 200 FPS, there was an article i read about it, an air force pilot was shown a series of white frames and one of those frames had a photo of an Aircraft, the frames where at 200FPS and he couold identify the Aircraft and model. So there u have it. The human eye is based on constant stream of light. so that that comment on the human eye cant detect more than 40 fps is pure ****, i can easily tell the difference. even beyond 100. This is fact btw.