[montiaro]

Have you monitored your GPU temps lately? I have also had issues where GPU's heat up and start to BSOD, fuzzy screens, and even smell. I have seen plenty of video cards work even after slightly melting some of the plastic parts on the video card but of course problems occur down the line.
CPUID - System & hardware benchmark, monitoring, reporting
I suggest as a precaution to download CPUID and run it while you play a game or just normal usage and post a screen shot after a couple hours of usage. This will show us voltage differences and temps.