This is a problem I've been having for the last few months and It's driving me crazy. I've debugged everything I could think of but maybe you have a few ideas. Here's the story. I've fried a grand total of 6 GPU's in the last year. Five in the last few months. They fry at random but all fry the same. PC shuts down and refuses to boot without removing the GPU. There are no pre warnings, it just goes POOF. GPU's have been rma'd and replaced thus far, also tested in another pc and deemed broken. There is no OC in place nor do temps exceed 70 degrees in case of 6x series and below 60 degrees for the 7x series. In the case of crossfire, the top card with the cables would be the first to fry. Upon switching cables the other card would ultimately fry. Time-frame varies. 3 x 6970's fried. 2 x 7970's fried 2 x 7950's fried. The power outlet is grounded and other pc's run on it with no problems. There is also a surge protector in place along with an UPS with AVR covering all the monitors, pc and router. What I've done. Countless stress testing and other checks, I'd mention them but seeing as a lot of parts are replaced I'll only mention the parts. Parts not mentioned are not tested in any way. PSU replaced thrice, coolermaster 850 backup (fried 1 GPU) and two corsair 750AX (fried 6 GPU's). Entire case and all the hardware has been replaced. All but the monitor and mouse/keyboard have been swapped. With and without UPS with AVR between power socket and PC. What has not yet been replaced. Monitors. (testing this now) Since I've fried another one today in the exact same manner after having replaced so many parts. I've decided to remove the soundcard and the removal of the HDMI, DVI cables from the last good GPU. I really have no clue what else to do and I would greatly appreciate any help you might have on this. I'm also not entirely sure how plausible it would be for me to even throw it at the soundcard or hdmi, dvi cables. Many thanks in advance.