cheers gents!

Might be the CPU - I'll have a look.

Drivers all up to date.

I'm currently running LFS on an Nvidia 6600 GFX card and Intel 3Ghz Multithread processor. It runs pretty well but does suffer serious slowdown when there are 5+ cars close by. It seems to run around 20-30 fps which i'm content with on with a 1280x1024 screen size with 32 bit colour.

I attach my settings. Please advise on what I should cut down to improve performance.