I have a P3 3ghz thingymajoig with 512mb of RAM and a ATI X600 graphics card. I get about 30 - 50 fps with the settings I run rFactor at. which is easily playable.
I've just got the demo. It's oK but only has 2 cars. What do you get when you get teh full thing? More cars? Do I have to download them or are they included? I really want the 80s touring car mod that's coming!