DOOM 3 mid-range, low-end, and vintage graphics comparo

WE'VE ALREADY examined DOOM 3's performance on the newest generation of high-end graphics cards from ATI and NVIDIA, but we're not done with the game just yet. While DOOM 3 is obviously most comfortable running on the latest high-end graphics hardware (especially NVIDIA's GeForce 6800 series) the vast majority of gamers are equipped with older and more mainstream graphics cards. These cards may not have the features or horsepower necessary to churn out playable frame rates with the resolution and detail level cranked, but they'll still run the game. The question is how well.