Its time to overhaul my system. I was going to get a Barton 2500 but my truck desperately needs a paint job so Im stuck with a sub-2000 XP. How do you OC them? I hear the graphite pencil doesnt work on them. I was thinking of a 1700 or 1800 because they are so cheap. The rest of the upgrades will be an MSI KT400 Ultra mobo, 512mb PC2700, WD 80gig SE hard drive and a Radeon 9000 Pro 128mb.