I just re-installed my WinXP-SP1, newest video drivers and def quakeworld package. I also patched my mouse for 1000 hz.
I am using 640x480x16bpp @ 134hz and i can get more than 250fps. No ghosting, no tearing, but *my QW stops for hard disk reading*.

This is my hardware:
Intel PIV Mobile CPU 1.60 GHZ
256MB RAM
Nvidia Geforece4 420 Go 16MB on-board memory

Did I miss something?
Is it a cmdline issue?
Isn't my hardware good enough? If it is, may I tweak it somehow?

My english is poor, sorry.

--
dvlsh

Ok, problem is solved. Just turned off the antialiasing and the anisotropic filtering at Nvidia drivers settings.