I'm having the strangest problem. I just built a new computer. Everything is working fine on a 1280x720 resolution, but when I go to a 1280x768 resolution every ten seconds or so the screen goes black for 1-2 seconds giving a message of "invalid format", then recovers the display. This repeats endlessly. I've updated nVidia drivers, and even tried beta drivers, that doesn't seem to be the problem. Only the 1280x768 resolution seems to be messed up. Any ideas? The monitor is just a 32'' LCD TV, it's detected as a generic non-pnp monitor. Thanks for help.