The question on everyones lips. Will your PC run Doom 3? Well, thanks to HardOCP theres handy guide with various specs, so just click on the one closest to yours and you’ll get an idea of where you stand. I myself am upgrading to an XP2500 machine so I should get 47fps, or there abouts, at 800×600. I might overclock my machine to get a bit more out of it.