The technical way is as follows:
Make a shortcut to Q3, and add the following strings:
D:\Q3A\quake3.exe +set cd_nocd 1 +set s_initsound 0
Then, move all the config files out of the baseq3 directory, and put them somewhere else for safekeeping. (Q3 will now generate a set of default configs- you'll need this for a true comparison.)
Open up Q3. Set the resolution to whatever mode you want to test in- 1024x768x16 is a good one.
Pull down the console ~ and type in "timedemo 1"
Now, run demo001 When it's completed, pull down the console to see the average fps, and compare it to other ppls.
Before overclocking my TNT2 I got 38.2 fps at 1024x768x16. After, I get 50.2. With my usual video settings tweaked for speed, I average 70-80fps during online games at 1024x768x32.
Pentium IV 2.4C Northwood- M0 stepping @ 3.2GHz HT
Air Cooled w/ SP-94 heatpipe & 92mm Vantex Tornado at 45C
4x256=1gb dual-channel 2-3-3-6 OCZ PC800DRAM @ 890MHz 3-4-4-8
MSI Neo2-PLS w/I865PE & SATA @ 4x267=1068MHz
BFG GeForceFX 5900@485/967MHz = 6284 3DMark2003s; dual-head 21" CRT & 19" LCD