Well Mick, youv't got a bigger chunck of CPu than I have and that 9800 can make a difference. You too Elliot have a bit more processing power, but I have everything maxed. I am wondering whether to put dynamic em on again or not but I get good performance all the same. I need to tweak something or other still, but 35 fps is good.
I would suggest that if you set your FPS to 60 or whatever and you get fluctuations by a few fps around the track, it means your po is over-stepping itself and this will probably slow down some effects (feeling of speed) and may cause lagging in your controller. Anything over 30 fps looks just as good I would bet, so i would set the fps at a lower level (a shade be low the lowest you get on the most demanding track in the rain) This will still give you a very fast game and it might just be a tad more reponsive and "speedier" to look at.
Elliot, I reckon you could switch your mirrors on to all objects and drop your fps to around 40 maybe a bit below, and no problems.
Larry
AMD 3000+,Epox EP-8RDA,Ram 1536mb 333 DDr, Rad 9800 pro omega 2.4.96, dx9b, Audigy, MOMO FF,winxp