14 DAY TRIAL // If you haven't downloaded it yet, you might want to get the AMD Catalyst 12.3 Graphics Driver WHQL (there is even a Linux version ).
After that, the Catalyst Application Profiles 12.3 CAP 1 should be your next stop.
The reason you should get this is that there are some games that, under certain cirucmstances, won't run well without it.
No that they won't start up or anything, but there are some graphics glitches that could ruin the day for players.
Test Drive Unlimited 2, FireFall, Dirt 3, Ridge Racer Unbounded and Stacking will run better or get over graphics problems that the drivr alone can't deal with.
To get more information on the matter, drop by here, where we more closely explored the matter. After that, follow the link therein (or just skip to the one below) to acquire the small tweak pack.