Halo 3 runs at 640p native XD

[MikeB]

@ sieanr

think you still don't understand what 1080p means, it means there are 1080 lines.

To compare this to 480p (as you are likely from the US), both 640x480 as well as 720x480 are often used 480p standards. For example consumer 1080i HDV camcorders record in 1440×1080 pixels instead of 1920x1080.