Halo only supports DirectX 9.0b-compliant video cards. It is good practice to always install the latest certified drivers for all of your hardware.

For assistance with top video issues, visit http://support.microsoft.com/?pr=gmsvideo.

"ATI Radeon 9800 PRO 128: You may experience inconsistent graphic performance with textures if you set the Mipmap Detail Level in the ATI Direct3D Control Panel to any setting except High Quality".

NVIDIA Video Cards and FSAA Modes: You may experience difficulties running Halo using NVIDIA video cards in any of the FSAA modes. If you are having a problem, you should disable the FSAA mode for the NVIDIA video card.

Via Motherboard Chipsets: If you have a Via brand motherboard, you may need to update to the latest “4-in-1” motherboard chipset drivers to avoid crashes.

看來ms真的槓上nv囉.....
可憐的卻是一般使用者呀.......