I have a PIII 450, slightly less ram (192Mb) and a 16Mb gfx card (VooDoo3)
Obviously this is quite a similar system, dependind on your bus speeds of your gfx card, mine are oc'd to 180/180. Another slight difference is that I have oc'd my cpu to 540.
Anyway, in GP4 I get a framerate of
18, with a PO of about 90 in traffic (it goes up to 130 at the start), 60 on my own.
I use the t-cam view, it seems to take less processor power.
My graphics settings are:
800x600x16
arcade overlays -off
TV overlays -on
video walls -off
Mirrors -on
heat haze -off
helmet visor -off (doesn't make a difference in t-cam view)
replay length - 30 secs
Advancedcar geometry - medium
trackside geometry - low
texture detail - high
pitcrew - highest
main view - no objects
mirror view - cars only
advanced lighting - on
bump mapping - on
reflections - low
environment mapping - off
shadows - off
Bazza