I'm running LFS here on a damn potato, Intel Duo core 3.0GHz, 2GB ram, 256MB GPU and honestly, I rather have most of the graphic settings set to low or off (AA off as well) just to have max FPS, mainly because it hurts me quite a lot on the starting grid, especially if you have 32 cars on the grid, I end up having 20 FPS instead of 200FPS.