You might want to try ...
http://www.omegadrivers.net/This guy does wonders with the ATI drivers ... and you don't have to uninstall your current ATI drivers.
You DO have to uninstall the ATI Control Center before installing his drivers and that is simple enough.
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The Omega Drivers are compatible with all ATI Radeon cards:
(it doesn't matter if they are DDR, SDR, PCI, PCI-E, AGP, Mobile, Retail, OEM or 3rd Party)
Radeon All In Wonder
Radeon 7x00/VE/LE
Radeon 8500/LE
Radeon 9x00/SE/Pro/XT/TX
Radeon X Series /SE/Pro/XT/PE
Radeon X 1k Series
All Mobility Radeons (M6 and up)