Do u have a VIA chipset?
i heard that card works ratherpoor with the via chip set.
First off i would get
VIA 4 in 1
Here
then search
Here
for some tweaks for you card.
Also get the newest drives for your card
get a file called powerstrip
Download Powerstrip here
am not sure if ATI has a file like Coolbit.reg for geoforce but search tweakfile.com and yahoo for more infomoation
hope this answer your question or helps you out