Thanks for the reply.

I shut down all programs before starting the game and it doesn't seem to make a difference.

At 1280x800 I get 23 frames on High preset and 50 frames on Very Low preset. I will list my 3D application settings from the Catalyst Control Center.

Anti-Aliasing Mode - Use application settings
Anti-Aliasing Samples - Use application settings
Filter - Standard
Anti-Aliasing Method - Multisampling
Morphological Filtering - Off

Anisotropic Filtering Mode - Use application settings
Anisotropic Filtering Level - Use application settings
Texture Filtering Quality - Standard
Surface Format Optimization - On

Wait for Vertical Refresh - Off, unless application specifies
OpenGL Triple Buffering - Off

Tessellation Mode - Use application settings