New
#11
temperatures are a killer for these cards... if your system is sealed off or has poor airflow then it may be choking off the video card before it has a chance to get to full performance...
It may be that specific rail from the power supply that is killing these cards too... especially if they keep dying or having problems again and again, and I bet you will continue to have this problem even with AMD/ATI based cards, IF this is the problem.