I have a p4 3.06mhz system, but recently a gig ram stick died and now I'm stuck with only a half gig.  Mind you it's on XP, but on larger MP maps I cause game lag and am occasionally even getting kicked for it.  Most of the time I do the honourable thing and drop if it's ruining it for everyone... I have all setttings on lowest for graphics.  Does turning off music help?  The UI even?  I could learn to play without it if I knew others would benefit.  I'm going to get another ram upgrade asap but this is a little frustrating.