I have experienced this first had not the burnt gpu, but woke up the other morning of using the new drivers. I've been running gpugrid manually set fans to 100% before I went to bed. Came downstairs and no fan noise but computer was on I figured it restarted in the middle of the night and back to default. Go over to computer gpugrid still running, computer did not restart, and gpu fans were completely off on both my gtx295's. Go to check temp cores were sitting at 120C. Way to fail nvidia Went back into precision and cranked the fans back to 100% and they worked.