My Hackintosh build is completed and running with a Gigabyte GA-Z77X-UP5 TH and NVidia GeForce GTX560Ti. Running 10.8.1 and BIOS Rev 4. I haven't installed anything but the OS and Adobe CS5. When I leave it running for a few hours without doing any work on it I get the spinning beach ball and my video gets screwy and I can't do anything. I can ping the box remotely and login via ssh without issue.
It must be video card related, I cannot login via vnc or Timbuktu. It will sometimes run for for 3 or 4 days without this happening, but it always does.
Energy Settings to never sleep display, computer or HD, No screensaver

I cannot find anything specific in the logs to determine the issue. Also when booting it flashes the following error:
Bad display config blick signature
ERROR: nVidia ROM Patching Failed!

I've tried variations of the EnableGraphics Command and get the same results.
I ran Cinebench and Geekbench stress tests without issues.

The Card works without Issues in Windows 7.
I followed this guide to config the hackintosh... (Success!) GIGABYTE GA-Z77X-UP5 TH Thunderbolt - Page 45 using unibeast and multibeast

Gigabyte GA-Z77X-UP5 TH
NVidia GeForce GTX560Ti
ML 10.8.1

Any help is appreciated
LJS

Test with the MyHack methode if same errors.