The first driver I installed were the 76.50's from sagers site.
Those had issues so I dled NVCleaner and cleaned things out.
Then I dl'ed the 71.89's from laptopvideo to go, they were good but not as fast as the 76.50's. Just now I tried to do some OCing and to my belief it was overclocking. the screenshots dont lie. I was having issues with it going back to stock clocks every time I entered a game so I hooked up my desktop LCD to the lappy so I could watch the temps and EVEREST. If I loaded the game the clocks would go back down, so i minimized the game, set the clocks again and they held.
So I dunno maybe some fluke? sure but It was ocing.