i was using the ati catalyst drivers on my ancient hd2600 pro and i had about 40 fps offline, i now have the omega drivers and i get about 65fps offline. In a server of 15 or so i still only get about 20fps, but i no longer get those hideous drops where the sound glitches and the display goes into slide show mode that i did with the ATi ones.
Omega all the way!