Re: FX 770m 64 bit kernel random X display corruption
I have also had a similar bug show up. I am running a Thinkpad T61p.(QuadroFX 550M) In my case it always occurs when resuming from suspend, and generally doing another suspend/resume cycle fixes it. It has happened around 5-10 times in probably a few hundred suspend/resume cycles. Did you try suspend/resume to fix it?
Given the rarity of the issue, I am wondering if this is a hardware bug cropping up... I don't use Windows enough on this machine to know if it would occur on there as well.