
Vid Cards, DX9, DooM3, ............................
Here is something that may interest you
http://www.planetdoom.com/
"Since we have been hearing alot of hoopla lately about HalfLife 2, Direct X9 and ATI graphic cards compared with NVIDIA accelerators, BonusWeb.cz fired off an email to The Carmack himself to ask how DOOM 3 will be affected by the difference between the two graphics platforms running DirectX 9. Here's what he had to say"
"Unfortunately, it will probably be representative of most DX9 games. Doom has a custom back end that uses the lower precisions on the GF-FX, but when you run it with standard fragment programs just like ATI, it is a lot slower. The precision doesn't really matter to Doom, but that won't be a reasonable option in future games designed around DX9 level hardware as a minimum spec."
You will also find an interview with Tim Willits