MSI GEFORCE 5900XT - As expected this video card delivered the best performance, it was able to deliver atleast 30fps even with advanced options enabled. 44fps at 1024x768 with advanced options enabled is very impressive however 58fps at 800x600 is much better for smooth gameplay.
INNO3D GEFORCE4 Ti4200 - Although this video card is showing it's age it was able to deliver atleast 30fps at all of the resolutions tested provided all of the advanced options are disabled. It was also able to deliver 30fps at 800x600 with the advanced options enabled.
3DPOWER Ti500 - Performed a bit slower than Inno3D GeForce4 Ti4200 with advanced options disabled and was only able to deliver 36fps at 640x480.
MSI GEFORCE4 MX 440 - Performed as expected and couldn't deliver playable performance with advanced options enabled. However it did manage 30fps at 800x600 or a better 41fps at 640x480 with advanced options disabled which isn't bad for a video card using DX7.
If you are going to run Doom3 on anything less powerful than a MSI GeForce 5900 XT then lowering the resolution or disabling some of the advanced options will give you a big increase in speed. To make things easier for you here are the advanced options with the biggest performance hit:-
HIGH QUALITY SPECIAL FX = 0%
SHADOWS = 29%
SPECULAR LIGHTING = 4%
BUMP MAPPING = 4%
2xAA = 8%
4xAA = 14%
AS YOU CAN SEE JUST BY DISABLING SHADOWS YOU GAIN AN EXTRA 29% PERFORMANCE!