I play CS source often, but the normal maps lag, the custom ones however, do not. My video settings are turned all the way to their lowest, and it hasn't helped much. I am begining to think it may be my computer. I use an HP Pavilion a1350y, it has a pentium 4 processer, and i use windows xp. My internet connection is a yahoo dsl. Are any of these insufficient for playin CS source?