Run DXDIAG. Now click on the right most tab then click on OVERRIDE.
Try the number 60 for now.
I'm having trouble switching resolution on my monitor. Specifically when a game tries to change to resolution I get a black screen with diagnal lines and have to reboot to get the resolution back. Same thing happens if I try this manually. If a game is set to the same resolution as my current settings (1680 X 1050) it works fine. See system and monitor info below. Driver appears up to date, but I don't believe it was updated for Vista.
Any help figuring out how to get games to work would be appreciated.
Monitor - BenQ FP202W 20" LCD
Windows Vista Ultimate
Dual GeForce 7900GT running in SLI mode (256 MB memory each)
ASUS A2N32-SLI Delux motherboard
AMD Athlon 64 X2 4800+