I was getting mega stutter and low fps in battlefield 3 beta, It was stopping me from playing at all. Best after loads of playing around, I ended up following this guide and it worked.

 

Clean it with Atiman Uninstaller v.6.0.0.msi. Download LINK

Run it with administrator privilege. Some antivirus software will give false alarm but it is just a false positive.

Then install Catalyst 11.9 + ( Catalyst 11.8 CAP5 http://www.overclock.net/ati-drivers…11-8-cap5.html only if you are crossfire).

Disable ULPS http://www.overclock.net/amd-ati/667…ling-ulps.html

During Catalyst install, if you get any error messages, ignore it and let it complete. Restart PC, then go to folder where the files extracted/unzipped to, find in CCC2 **.exe then perform repair.

 

After rebooting and finallay loading the drivers, Battlefield 3 worked perfectly!

Thanks!