So I just got my 2.4 MBP with 2g of ram, put my copy of doom 3 in and installed and updated. When I'm using the "Higher Performance" setting, I start at the beginning of the game and go run through a couple doors, skip through a couple cut scenes and after about 1 min when I am almost to the guy that assigns you your first little mission I get to one of the doors and when it goes to open the framerate drops to about 1 frame every 3 to 5 seconds. Even if I hit escape and the menu pops up it is still just as slow. I change to the "Better battery life" setting(the 9400m) and there doesnt seem to be any problems. So far I have just had it at max res. at ultra quality and I tried with vertical sync and 2xAA on then with both off. Once I get more time I will fiddle around some more but just wondering if anyone had any ideas. The machine doesn't get amazingly hot or anything and as soon as I exit the game everything is fine.