Ot of curiosity, are the new guys with the AMD GPUs using OSX or Windows? 2.2ghz 15" here, I find that the games (e.g. team fortress 2) 99% of the time it runs awesome in OSX but in extreme firefights will hickup for a split second, causing you to die (Settings high at native res). I'm also experiencing some crashing when I change graphics settings. Maybe my 8gb ram in the mail will fix this? maybe not.