It seems ATi is looking ahead rather than back with this set of drivers, as it appears they only enhance Radeon X1000 series cards. I also seems like the real purpose of this update is for video encoding so don't expect any gains in game FPS.

The 5.13 drivers are optimized for quality video playback, AVIVO, in other words HDTV lovin

They have also released an unsupported media encoder which offloads the encoding onto the GPU, makes me wish I had one now! So any of you lucky people with an X1000 series card can pick up the catalysts here and the AVIVO encoder here.

Thanks to 3dGuru for this release.