Quake III: Arena settings:
16-bit or 32-bit color, texture and depth buffer
Vsync disabled

commandline:
+timedemo 1 +demo demo002
default triangle load (+r_lodbias 0 +r_subdivisions 4 +r_lodcurveerror 250)
default texture detail (+r_picmip 1)
non-compressed textures (+r_ext_compress_textures 0)

The 'Expendable' framerate recording (frames 1220 to 1419) for MAXX, in contrast to that for GeForce DDR, shows a similar 'fast-slow' pattern to 'Quake III: Arena'.

Expendable settings Commandline: -timedem2
Vsync disabled
1600x1200x32