I have Successfully run CFS3 on my HP Pavilion 6635 with 63MB RAM and a 433Mhz Intel Celeron and a 2MB Graphics Chip.    BEAT that!

It dosent run well, but i was able to get into quick combat after about 15MIN and all the Graphics are white except for the outline of the plane.  i get maybe .1 FPS at the best, but its the only computer i have because im incredibly poor and i got CFS3 on the day it came out.  Im just goin to keep it until i get a good computer, but from what ive seen it appears as if id would be a spectacular game on a fast system.  So all i have to say is BE THANKFULL that you have a computer that actually has a graphics card, or thats' speed is measured in GHZ not Mhz.  So just be thankfull at what you have and dont complain when you only get 10FPS on it.  Im lucky to get 10FPS on CFS2 with so-so graphics.