Full Details on Amazon.com : http://www.amazon.com/gp/product/B0009B0KOQ?tag=tsukuyomi-20

AMD Athlon 64 processor 3200 Socket 939 ( ADA3200BPBOX )

939 Pin architecture
Industry-leading performance for todays software
Built-in support for future 64-bit applications with AMD64 technology
Guard your data with AMD Enhanced Virus Protection for Microsoft Windows XP SP2
HyperTransport technology and an integrated DDR memory controller for maximum performance and system efficiency