hey everybody, i have the macbook pro with this 2 gpus i used to use only the 9600m gt for gaming as 9400m was handling everything, has better battery life and run cooler. but i notice when i'm playing 1080p videos the 9600m gt perform better. ok, 1080p youtube 9400m no problem at all. 1080p played on vlc 9400m laggy sometimes. but 9600m gt perform well. 1080p played on plex 9400m no problem at all. that's why i think the new auto switching graphic cards on the new macbook pro is cool. sometimes i'm on 9600m gt and decide to take the mac to the living area and forget that i was on the dedicated card while using on battery. i still love my macbook pro, but that's one of the reason i wanted to upgrade to the new one but still not sure.