Well, I'm not concerned at the least bit with upgradability. I have this Pentium 4 rig with PCI Express and I'm sure it'll keep my Dad going for a while. By the time I'll get rid of this Socket A rig is when it really starts to show its age or when the new P4 6xx come out and I want one or when Socket 939 PCIe boards are actually seen on the market...right now ZZF was suppose to get the K8N Neo4 yesterday, the delivery date is now pushed to 1/19 and the prices for PCIe boards keep getting hiked...all I can think of as being cost effective is Socket A + OC...