I have been having the same problem with my HIS 3870x2, doing random reboots
After a few months of the problem happening more and more, I tried the graphics card in my friends PC and it started doing the same after about 10 minutes. I just sent my card back to Overclockers yesterday which cost me £20.70Had email off them today saying it will take 5 to 7 days to test.
So now I have a ATi 1950 256mb in my PC, at lest I’m not getting the random reboots![]()
i was amazed at how much it cost when i sent back my 4870x2 , it was also £20.70 for next day


Had email off them today saying it will take 5 to 7 days to test.