Sir nitestick is this an example of the motherboard you pertaining?
ASUS P5PE-VM supporting Intel Core 2 Duo. Click the link for the specs..It supports DDR memory and AGP8X slot..
http://www.asus.com/search.aspx?sear...rchkey=p5pe-vm
You can still use your 2x512MB Kingston DDR400, your current gfx card..then you can buy also the cheapest Core 2 Duo E6300..
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AMD Athlon 64 3800+ Venice
MSI K8N Neo4-F
Palit Geforce 6200TC 256Mb
2x512Mb SS Corsair Value Select
160Gb Seagate SATA