AMD Opteron 4171 HE OS4171FNU6DGO 2.1GHz 6.4GT/s 6MB Server Processor C32 SocketIncluded is a single AMD Opteron 4100 Series 4171! Model OS4171FNU6DGO Socket C32 Speed 2.1 GHz Cores 6 Threads 6 FSB or GT/s 6.4 GT/s L1 Cache 6 MB Stepping HY-D1 If you have ANY issues with your purchase, please contact us immediately! If you have any questions at all, please ask via the link at the bottom of the page! We are here to help 🙂 You may be interested in our other items! About us: Central Valley Computer Parts, Inc. has been in business since 2010. What started as a home business and hobby 7 years ago has since grown into a full-blown business supporting 10 team members! We operate out of a warehouse in Ripon, California and strive to provide the best customer service we can. We hope to serve you for many years to come!