AA is already turned off. I also decreased the res in game to 1680 instead of 1920.
Originally. I would have 100+ fps and the it would drop to 50 for half a second. This would repeat every 5-10 seconds. Even when I doubt move in the game.
Now that I decreased the res, I would get 150+ fps but I don't see the drop in fps. However I still get the studdering (half second freeze).
Just got MW2 so I'll test that too.
Would windows 7 be a factor?