XEON P E5640 12M 2.66 GHZ 5.86 GT/S QPI FC-LGA10 MM#907460Intel Xeon E5640 Quad core (4 Core) 2. 66 GHz Processor 12 MB L3 Cache 64 bit Processing Socket B LGA 1366 No Graphics 80 W VPN: BX80614E5640 SKU: RSC660189 UPC: 5032037010900 12 MB of L3 cache rapidly retrieves the most used data available to improve system performance Intel Xeon 2. 66 GHz processor offers great stability when you are dealing with 3D rendering software or playing games. Integrated ECC memory reduces the chance of critical system