"When anti aliasing is enabled in the control panels of each respective manufacturer, only the Nvidia cards showed a difference in frame rate or visual quality. The HD 5830 did not show a difference in frame rate when Anti aliasing was enabled showing that AA is not enabled for ATI cards at this time. At this point, it looks like only Nvidia has this option available to the gamer. When enabled, the GTX 460 still has the muscle to deliver acceptable frame rates in the resolutions that gamers at this price point play in, namely 1920x1200 and below."
Starcraft II Beta Performance Preview @ OCC
