I've seen a lot of questions about unity performance . When is an official Ubuntu update for the proprietary ATI driver coming . People are saying this is improving unity performance a lot . Sorry but I'm new to Ubuntu and a little bit afraid to do this change myself.
You can add extra repository with new driver version (for AMD and NVidia cards):
There is new version of AMD Catalsys driver during the build process (at leas at the moment). You can check it on that page:
I am not sure if it is these version - the numbers are different and I don't know the number schema but probably it will be the new version of Catalsysy drivers.