Custom Build Computer <3 With WarRock, Winamp, xfire, ventrilo on my CPU usage is like 3-9%
Edit: I also use a lot of high-end cleaning programs with my computer I don't use an AV tho because it lags like fuck..
But also sometimes your ISP has a big part in the lag you experience My old ISP (Before they ended the service with me for piracy crimes I could get into green ping limit room on a WarRock server that was in red and now with my new ISP I can't and sometimes I cant spawn but still walk around and kill them even when I didn't spawn :P