I've seen a few monitors react the same way when they overheat. How old is your monitor? Every shitcan monitor I've seen goes black or fades to black if they get too hot. I think it's a possibility...can you switch monitors?
Other than the monitor, I'm really not sure what it could be. The symptoms point to the videocard, but there's no reason for it to be doing it at stock speeds. I guess you'll have to do what every troubleshooter does: start taking out parts that you don't need until it stops doing it. Try to switch out parts with others if you have them. Good luck!
-Lasereth
__________________
"A Darwinian attacks his theory, seeking to find flaws. An ID believer defends his theory, seeking to conceal flaws." -Roger Ebert
|