Problem with ATIRage128 Pro

The Librarian

Registered
Hi
I have an AGP G4 with an ATIRage128Pro Video Card, an ADC2VGA adaptator and a 15' Multiple Scan Apple Display on MacOS X.
The only problem I have related to the card is that with some games (QuakeIII, Return to Castle Wolfenstein...) in full screen mode the screen "shakes", whatever the sync rate and video mode. Still it works perfectly in window mode (but the gaming experience is somewhat reduced...) and with other games such as Unreal Tournament in full screen mode. Where do you think it comes from ? OpenGL drivers ? Video Card ? Adaptator or screen ? And can it be fixed ?
Thanks !
 
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