Dell PowerEdge R610 Server. Dual Intel Xeon X5560 2.8Ghz CPUs. 4x 146GB 15,000rpm SAS Drives. Dual hot-swap 750w Power Supplies. 1U Rackmount, rack rails included. Service Tag is 5F5SVH1 and you can use the Dell website to get additional information. Does not includes OS. Was pulled from a working installation when they upgraded to a new server. If you have any questions, just send me a message, and we will be happy to help.