I have a XFX 5850, been working fine for a couple of years now without overclocking suddenly stopped working a few months back. After I turn the PC on it won't even boot up then when I tried to replace it with a much lower end card computer starts to work fine. Can't check for actual temps on the card because it won't even boot the PC when it's in use. Any clues to as what might have happened? Is my card dead? After I tried it on different PC same issue happens, can't even start up any PC. PCB gets really hot after few minutes upon checking. No OC on any of my components. Any advise would be really a great help. Thanks guys