me too.... I have found XG 76.50 the best. I did try the next releases-- The WHQL certified one but it was crap. Corrupted all my video files. Could not play back video files properly..
Stick to official nvidia releases, leaked betas may be problematic for obvious reasons.
Nvidia gets 7 leaks weekly, who has the patience to try them all when the best of the lot might give a 2fps boost.
Welll initially when i installed 78.01 it gave me courrupted vidoes... I then uninstalled the drivers.. Booted into safe mode... Cleaned with driver cleaner... reebooted again and then installed 78.01 again... it worked like a charm this time...