There was this site somewhere
where were tips to tweak your connection at quake2..
But anyways..
Basicly it was like this:
Join some server and put your netgraph on...
Then put some values of rate and cl_maxfps
and then decrease and increase them so that
ur netgraph is totally (or atleast almost) flat.
That might not be 100% correct but i think it might give u some direction..
If i dont remember totally wrong
When i had Pentium 2 350mhz, 128mb RAM (or 64

) and voodoo2
I used rate 6000 and i quess cl_maxfps was 85
I'm insane and Christ My insanity.