Hexus reports about a new tool from ATI which dramatically improves the performance of ATI's cards in OpenGL games when antialiasing is enabled at high resolution. They claim improvements of up to 35 percent in Doom 3.
As well as supporting Doom3, the tool is said to increase performance in all OpenGL titles when using antialiasing. With Doom3 the poster child for that graphics API, ATI's willingness to promote the increases in that application in particular are understandable.
The fix will shortly be rolled into CATALYST 5.11 according to ATI sources and a beta drop of that driver will be made available for testing in due course, before the final WHQL driver from Terry Makedon's CATALYST team is made available for public download in November.
Check it out over here to see some benchmarks from Hexus.