Hey all, I am having trouble with ATITool all of a sudden! Ok, so I installed Call of Duty 2 with the DVD installer. If I boot the game and start playing (with all settings highest apart from AA), there isn't too much lag. I can turn down a setting and it runs sweet. BUT, get this. I start AtiTool and do an overclock from the standard 400/400 to say 470/470, and sometimes higher. Doing this, slows the frame-rate of COD down immensly, making it unplayable, REGARDLESS of the level of graphic setting. For instance, I made the settings lowest, and there is still this huge lag. The game runs at about 2 fps when overclocked, but probably between 25-30 when not. Anyone got any ideas? The mac I am using is an iMac 20" with 128MB VRAM and 1GB RAM.