So, everytime I put the graphics card into my motherboard, everything starts to freeze up after 45 minutes. It's a Nvidia 560 card, with a Seasonic 620watt PSU. I figured, okay, graphics card might be dying, time to RMA. After two more graphics cards, it's still keeps freezing up. Okay, maybe the PSU is going bad. Switched that out and it still acts bad. (though I'm not sure 12v fluctuation is normal on either). They both fluctuate about .088 volts. I don't have a spare mobo to swap out. Anybody wanna take a crack at what the problem is?