1) turn OFF the Antialiasing (Display/Settings/Advanced).
2) use a fast & verified browser (Internet Explorer 6, 7, or FireFox 3.5)
3) close all the other browser windows or tabs
4) close all the other network suckers (messengers, chat, etc)
5) close all the unneeded background processes (advanced users only)
6) turn OFF the Q3 Shaders (in the game starting menu) - it might help for the AZT map.
Here is a proof.
A very cheap computer: Athlon XP 2400, 2GB DDR2-800, onboard Nvidia 6100
Windows XP-SP2, Internet Explorer 6.
40-45 FPS in full camp (8 players).
