LiquidMetal14
hide your water-based mammals
Had that problem. I needed to remove every shred of the Nvidia driver, restart, install the latest and remember "Clean" option, then it worked.
Damn, I upgraded the last one (331.65) and didn't do my normal clean remove via driversweeper and clean install.
That and I just updated to a new Sabertooth X79 bios. Living the hard life here.