Early 2008 model 15" macbook pro processor: 2.6ghz intel core duo video card: nvidia geforce 8600m gt (512) ram: 4 gigs Please only post here if your machine has these exact specs If your machine does not have these exact specs but you have advice please post on http://forums.macrumors.com/showthread.php?t=568267 I am trying to get input for my problem from people who have the same hardware as me. when trying to game on my system with the above specs (in addition to the 200gig HD at 7200), i have encountered chronic graphic stuttering. I want to know if anyone else with this setup has encountered the same issue. I have run windows vista 64, 32, and xp 32 on my machine and have encountered the same issue each time. I have also returned the computer and had it replaced with a brand new one with the same hardware specs and have experienced the same issue.