some more progress... if you can call it that.
Tonight with 4 other cars on the grid LX4/SO6, 10 fps for the first 2 laps. (all other tracks have a frame rate drop too I've noticed. But only 5-10fps... SO has lost 50-60fps)
on LFS:
I have low-res textures (incl skins) - Had better FPS with high res textures in patch X on all other tracks, which aparently haven't been touched.
0xAA and 0xAF
on rFactor I can run:
DX9
High or Max on all graphical options and extras
4xAA 4xAF
and still get 50fps in the middle of the grid in a 25 car race
RACE07 I run
DX9 (it's all it supports)
Medium graphical options on everything
2xAA 0xAF
and I get 40-50fps in the middle of a 20 car grid in an online race
So, WHY on a DX8(!!) game can I only get 10fps with 4 cars on South City? Patch X was fine.
I also HATE this 'clutch model' - i can't even call it that with a straight face. But that's not for this topic.
P4 3.06 with HT
2GB DDR400
GeForce 7600GS 256MB
if those can run rFactor and RACE07 at above graphics options without stuttering, then why the hell can't it run LFS at a good framerate with it's inferior DX8 graphics? Have the physics really changed that much so my processor can't run it anymore? I can't see DX8 wanting full power out of a GF7600 either.
Also to add I had exactly the same problems with my old Athlon XP3200+ and 1GB of DDR400 before they died.