I have The Radeon HD6850 and during games it crashes sometimes, sometimes more frequent than others. my last crash ( about 2 minutes ago ) i actually heard the Fan on the graphics card power down and almost stop before the graphics card started up again. Am i correct in thinking that i have a faulty PSU? it is a 750w Evo Labs PSU.
i have a 6 year old PSU which is 750w but the leads will be different, but before i had the HD 6850 i had HD 5750 and i had the same problem as i do no, i know i dont have conflicting drivers because ive ran a driver sweep and ccleaner.
In my opinion i would say that it is the power supply or the motherboard. if the power supply is shorting out it will cause the graphics cards to stop for a short amount of time. if the pcie slot is going out it can also start to act up once in awhile.