Thank you for the replies

The problem is with quake II, quake III(opengl), driver (glide2x) and with Glide 2x/3x screensavers. All of these worked with Windows 98SE on the same comp. and VC.
When selecting the 3dfxGl driver in Quake II it shows a grey screen for a while and then switches to software mode.
Quake III reports no openGL system available.
The Driver-configuration utility shows glide2x in the drivers list, but when I try to test the selected mode it reports "Voodoo rush expected, none detected" . The same happens in Win98 when you replace the Rush glide2x.dll with glide2x.dll for a different vooodoo card. This message comes from the glide2x library not the game itself.
Also NFS3 doesn't work with the voodoo driver, but I'm not sure if it uses some Direct3D stuff or is utilising Glide.
I don't understand how glide2x.dll recognises the current videocard and why it says "none detected". Maybe missing/wrong environment variable?
Hasn't anybody used this card with 2k/XP? Am I the only one?

))