Tried this beta and i feelt i was having more FPS... and decided to search the internet, according to this article these drivers are in fact faster:

http://benchmark3d.com/amd-catalyst-12-6-9-00-beta-june-12-benchmark/4

This is a beta, it may have some issues...

you can find these drivers here:

http://downloads.guru3d.com/download.php?det=2926