This is very annoying problem as even with 75fps you can get this. I get this mostly from top view at replay, also at corners when panning left or right when car turns.

I have read that there is several things that can make this happen.
-AGP Aperture size is too high/too low
-Fast write is on/off
And many more quite random actually.

One thing that has sometimes fixed this is to change fast write or AGP Aperture size in bios and reinstalling display card driver. Of course you need to unistall display card driver before you change bios settings.

However I have not found 100% solution for this, so it takes many different changes until it goes away, sometimes only reinstalling windows from fresh fixes it, but sometimes even that won't help.

Maybe someone will have good answer how this problem should be fixed?

I have Ati Radeon 9700, if that matters. Would be good to have here instructions for both Nvidia and Ati cards.

No install new drivers tips please, sometimes new drivers even will cause whole problem and certainly are not fixing this issue except in some very rare cases.

I read soemthing similar to this not too long ago. I take it your using a wheel?

Your going to think im barking mad here, but open up Windows Media Player, it doesnt need to be playing anything, just leave it in the background and try the game. it worked for someone on here a few weeks ago.

The "sound lag" and the "minimum sleep" options are things to check - try increasing both. Something that might help stabilize your fps would be "vertical sync", especially if you have triple buffering enabled from your videocard drivers.

Turning vertical sync=on in LFS did cure around 70% of it, I think that lowest FPS might around 60, usually it is over 100 and when I'm driving it sure is around 100fps whole time, very rarely goes below.

Other settings did not helped at all, also keeping media player running at background did not helped at all.

Most of it has gone now however, motion on screen looks much more fluid like, natural or so.

I think that my gfx drivers are still at default setting, but maybe I just need to turn on vsync from gfx driver so other titles without ingame adjustment will get benefit from this setting.

Thank you from your help, now I got rid of most from that, only need to find out now how to get rid of rest micro pauses and stuttering

Well, not very disturbing anymore, but I need that perfection

Oh yes, I use Microsoft USB wheel. That reminds me from this Siemens USB datacable that I have connected, my brother with weak cpu told that it is slowing down his computer so he must unplug it before starting any games, must test that one too.

Also, before you start LFS - open up your Task Manager and put it to sort the running processes by CPU usage and watch it for a while to see if there is some process that goes up in CPU usage once in a while (not to mention if there is some process you don't recognize that is running and it shouldn't be).

There is no extra processes running, just usual stuff that can't be avoided, I should get more memory, that could help a bit too, now only 512MB

My cpu has 1MB cache and it has been greatest improvement to LFS performance, so maybe LFS just likes from big amount of memory in general :P

With only 75??? Cmon, man, i can`t even get 40 with my little machine

Quote from Lible :

With only 75??? Cmon, man, i can`t even get 40 with my little machine

Lol, problem is not with fps at all, those micro pauses can happen even with 160fps, very annoying when fps are good and still not smooth, it makes water come from my eyes very quickly

It is mostly solved now, very hard to notice it, only with side vision it can be seen, but maybe it is just because of my crt screen and only 85hz refresh rate.
I have not made any more changes after that Vsync.

I was experiencing similar kind of stuttering even havin 70+ fps, found out that installing sp2 and removing my norton internet security solved the problem for me.

i had a similar problem mostly online and i solved changing the thermal paste of the GPU, it lowered about 10° the temperature of the GPU.

There just is no anything common thing that could cause this problem then, it could be anything and to solve it you have to be ready for everything.

I have passive watercooling (cpu,gfx,NB), water temp is +26 now, so I'm safe side with it :P

I think that my problems started after installing SP2 or when I flashed my gfx card's bios to pro version.

Oh yes, when I did overclock my gfx card all artifacts and other problems disappeared, with this new pro bios I have not got any other problems that stuttering and even that is now tightly under control

What logic I must ask, lol.