Ever since I got my mid 2010 MBP I've felt that my 330m is faulty. I have a lot of trouble playing games that others run on high settings. Heck, I cant even play Witcher (from 2007) on high settings, and it will even stutter here and there on medium. Definitely not too demanding of a game. Is there a way to test for this. Unfortunately since I play all of my games on the Windows side going to the genius bar isnt much of an option.