Frame Rate Questions

[Paul Berger]

What is the easiest way to determine if poor frame rates is do to video
driver or game engine overhead?

On indoor levels I usually get 20-30fps, but outdoor levels I get
5-10fps at times. Tweaking the detail settings does not appear to have
an effect, and neither does the screen resolution.

I running an ATI Radeon 9000 Pro on a 1.4Ghz Athlon with 512MB RAM ...
not a wimpy system.  The XFree86.0.log says it's using AGP and DRI is
enabled using the ATI FireGL driver 2.5.1.

Thanks for the help.
Paul