Quake III Arena tests OpenGL performance through the scientific use of a rail gun and gibbed body bits. It uses advanced features such as curved surfaces and high-polygon models to bring your video card to its knees.
Normal mode uses 16-bit color, small textures, and relatively low complexity scenes.
In normal mode, the Annihilator 2 falls ever so slightly behind the Leadtek card in most tests, but never by a significant margin. Periodically it ends up ahead, but mostly its behind by a sliver of a sliver. Performance drops off significantly at 1280x1024, but maintains plenty of strength all the way though to 1600x1200.