Its been a while since nVidia graphics updates have worked for me. I have been using 191.07 because anything else made my Pageflakes home page go into spasm if the mouse was run across it.
Some good news.. driver version 197.13 works great.. get it here..
The nVidia Control Panel applet has a bit more to play with, but I always leave the settings alone. The default works well enough for my purposes