Product UPC: 883436091541 IBM Xeon DP X5667 3.06 GHz Processor Upgrade - Socket B LGA-1366 # of Cores: Quad-Core Series: Xeon DP L2 Cache: 1MB L3 Cache: 12MB Manufacturing Tech: 32 nm 64-Bit Support: Yes Cooling Device: Cooling device not included - Processor Only QPI: 6.4 GT/s