Thanks i try it but i have allready the newest version of NVIDIA from NVIDA.com but before that i had a NVIDIA driver whictch was not orginal mabey that is the Problem.
1: Download and install DriverCleaner, you can find it
here.
2: Uninstall your current Nvidia drivers
3: Reboot
4: Run DriverCleaner and let it clean 'Nvidia'
5: Install your new drivers
6: (Hopefully) Play Tremulous!