Found a link to this on DailyRotation.com.
Quoted from MajorGeeks.com
ATI Tray Tools is a free utility that runs in the system tray and provides easy right-click access to all of your ATI video card's crucial settings. You can change anisotropic filtering + antialiasing levels in Direct3D and OpenGL, adjust image quality, turn on/off special driver features, or simply just fool around with clock settings (core and memory speeds). It uses minimal system resources and isn't intrusive.