OneENG-
"None of todays games have sufficient poly count to make vertex calculation any where near as limiting as fill rate and band width on the video card (on at least a Duron 600 or better)."
TestDrive6- Athlon 550@600(I'd say that would qualify as Duron 600 class) software mode.
320x240 16bit low detail- 33FPS
GF1 @130/301 Det3
All scores 32bit High detail settings
640x480 - 106FPS
800x600 - 91FPS
1024x768 - 64FPS
That's one game that is clearly more limited by vertex data then bandwith. Roughly twice as fast at 1024x768 32bit color high quality settings as 320x240 16bit with all visual options off using software T&L.
16bit T&L numbers in case anyone is wondering-
640x480- 109FPS
800x600- 105FPS
1024x768- 89FPS
1280x960- 67FPS
Don't know why, but the game refuses to run 1280x960 32bit or 1600x1200 16 or 32bit to benchmark, software or hardware. By these numbers it would take about a 1.2GHZ Athlon to run with the GF at the higher resolutions and a ~2GHZ to match the lower resolutions(though not entirely accurate as any OC or Underclocking of the processor results in linear FPS changes as the game code is the bottleneck, not the T&L unit). Perhaps this game would be bandwith limited if it had a 2GHZ Athlon, as it stands for Athlon owners this game is T&L limited even at the lowest possible settings. May only be one example, but you said none
WingnutPEZ-
And Halo may never come out on the PC."
It has been confirmed that it will be coming to both the PC and the Mac, though I wouldn't count on seeing either of them until a few months after X-Box launches.