That means it's probably best to turn FSAA off in games like Quake III and Unreal Tournament. This makes turning FSAA on a good idea for such games. Quake I tested Quake III v1.17 with 128MB of RAM allocated to the application. I first tested using Quake's default settings with FSAA off and on. Then I tested it again using the locki.cfg config file, which optimizes Quake III for maximum performance at the expense of visual quality.
Longer bars are better.
There are several interesting trends in these results. First of all, with FSAA turned off, performance is nearly identical across all resolutions. This is likely because the games are limited by the processing power of the Mac rather than the card. Turning on 2x FSAA tests the card a little better. There's a moderate hit at 800x600, and a large hit at 1024x768.