Could be anything. Run a full scan with malwarebytes MBAM. Make sure all the drivers are updated. Try a different anti-virus program. Open the computer and make sure the vents are clog free, clean it out. Yank the cards and clean the contacts. Unplug any external devices from the PC and just run it bare bones to test. Start disabling / deleting apps that run in the background.
^^^ I would do Mbam 1st, the rest in no particular order. And if the problem persists, perhaps a fresh format and clean install of Windows,
Someone on CE said that their GTX 560 Ti had same problems when he updated the drivers from 314.22 to newer. I have the same card and I think my problems started around the time 320 drivers were released. I downgraded to 314 now but I don't have any way to test if that solved it. Is there any program or way to test the card or the driver if the problem is solved now? --- http://backloggery.com/relix/sig.gif http://backloggery.com/relix
Try a different power supply. I had a similar issue a few months ago with my old PC.
I don't have another to test and tight on money atm. Tho I had a little accident with it a while ago, dropped a heavy book behind my desk and it unplugged the cord, could be that it damaged the PSU too... Only thing I didn't test from the above list is that I didn't remove the card to clean the contacts yet, I'll test if downgrading the driver helped or not first.
Just have to hope it's driver related now. --- http://i.imgur.com/uFYnR.gif