XP SP3-32bits
Core 2 Duo 2.6Ghz overclocked at 3.2Ghz
2GB RAM DDR2-800
EVGA GTX 260 216-cores
1024x768 75hz game resolution (i get same fps with 1680x1050)
= 700fps
The fps is the result of "timedemo" command on 4on4 maps e1m2, dm2, dm3.
If you don't plan to play 4on4 or FFA, for 2on2 and 1on1 better fps will be achieved.
In QW fps are more affected by cpu than gpu.
Take in mind you should use multiples of 77 (154, 231, 308, 385, 462, 539, 616, 693, 770)
Honestly i don't see the need for more than 770, it will only stress graphic card for almost no gain.
I'm using 462fps and it's very smooth, don't know if it has anything to do with mouse being at 500hz.
The following variables are the ones that have the most impact on fps.
My settings:
I'm using external textures and models.
I'm not using particle effects ("gl_part_xxx 0" and "gl_particle_xxx 0"
gl_powerupshells "1"
r_powerupGlow "2"
gl_flashblend "0"
cl_muzzleflash "0"
r_dynamic "1"
r_explosionLight "0"
r_rocketLight "0"
r_grenadeTrail "0"
gl_nailtrail "0"
r_drawflame "0"
Test yourself a few "timedemo demo-file-name.mvd" so you know a stable value.