i have a pentium 4, 2.8ghz processor, an asus P4SD-VX mobo, 1.5 gigs of ram (512 mb unknown pc2700 that came with my comp, 1 gig kingston value ram pc 3200, i read that it was fine to mix them) and a geforce 6800gs agp card. i have the 4 extra pixel pipelines and vertex shader unlocked, and i'm...