UT2003
No card would feel really tested until put through the UT2003 benchmark. Build 2206 used. Two flybys and two robot matches are averaged to give a final pair of results. We're concentrating on the more card limited flyby results.
Higher core speed and memory bandwidth allow the FX series to stomp ahead. At 1024x768x32, it's all about the subsystem. Fillrate considerations come in at higher resolutions.