OK, i get a BSOD when i exit UT3 after about 30 mins of play, the BSOD says

Process_Has_locked_pages something like that..............wtf is goin on, anyone else get this crap, im about to return this damn card......this is on a fresh windows install, vista x64 have tried drivers 169.02/04

i hope this is driver related.....didnt have these issues with my 8800GTX, its not my overclock this is strickly a video card issue.