so what reasons are you RMAing your cards on
that they are unstable as they overheat? or they just run hot??

what happens if you increase the fan speed
does it still run hot

i don't know what some of these manufacturers are thinking.......ati 4870X2 was idling at like 80C+ which i thought was ridiculous as well but the fan is set to run at lowest possible speed to reduce noise i guess

trying bumping the fan a bit man and see if that fixes it