That's the only disadvantage with Coolbits and maybe most other OC'ing utilities for GPU. You constantly have to monitor temperatures and take artifacts seriously. You probably will take artifacts seriously anyway since they warg-out your game. Too bad the threshold is way too high. 135C for a 6800 GT? Your card could easily burn at 100C. Matter of fact, running in the 90s would be dangerous after a long period of time.