The human eye can easily detect the flicker of a 60Hz refresh rate, and any time your video card produces less than 60 FPS if becomes obviously jerky. At rates above 60 FPS the situation changes: if your PC is delivering 60 FPS or more then your eye is fully fooled into believing non-flickering motion. Many people believe that frame rates above 60 per second are a waste of time and money as the eye can´t detect all those extra frames. However, when frame rates climb into the triple digits the human eye can detect differences in quality, not quantity. Ultimately, only you can decide how many FPS is enough...
Frames Per Second are important because each " frame" that is drawn on your screen is a rock solid, stand-alone image - fully detailed, with no " motion blur". You can confirm this by taking a screen shot ( with the PRINT SCREEN key) when things on the screen are going fast. Television can survive on 30 fps because each image on a TV screen is blurry. Hit PAUSE on your VCR when things are moving fast to confirm this for yourself.
http://www.planetdescent.ent.com/d3help/framerate.shtml
Alors ?
Lynchcore, F-Zero 64 en Europe c´était 50 fps ;-)