I was just at a friends place and adjusted/benched his new A7V + T-bird 800 + GF2 GTS + PC133, and we got 6534 3DMarks in 3DMark 2000 (default benchmark). So, there' something fishy here... We used Detonators 6.27 (with e-Geforce label) and Via 4in1 424. Also, it was in WinME, with System Restore Utility disabled and not too many progs running (of course). No overclocks whatsoever yet...
This Athlon sytem is excellent for Quake, but unfortunately sucks in Clusterball (which runs very smooth on my machine - see bottom). Some strange kind of (microscopic but unbearable) swapping/AGP texturing occurs in that game (Clusterball). Hmm... Somebody had similar problems in any other OpenGL game?