Features
From cchtml.com
2D
X server
- XFree86 and X.org support
Xaa
- X Acclerated Architecture
Xv
- One Hardware or OpenGL overlay
TV Out
- NTSC and PAL support
3D
OpenGL
- Provides some OpenGL 2.0 commands
BUT NOT the OpenGL 2.0 version of the shading language.
The ATI driver uses a version of the shading language called the ARB extension. The ARB extension was used before OpenGL 2.0 was finished.