HPE – Certified Genuine Parts Intel Xeon 5600 X5650 Hexa-core (6 Core) 2.66 GHz Processor Upgrade – 12 MB L3 Cache – 1.50 MB L2 Cache – 64-bit Processing – 3.06 GHz Overclocking Speed – 32 nm – Socket B LGA-1366 – 95 W