495914-B21 I HP Intel Xeon DP Quad-core E5520 2.26GHz - Processor CPUTechnical Information Processor Manufacturer Intel Processor Core Quad core (4 Core) Clock Speed 2. 26 GHz QuickPath Interconnect 5. 86 GT s L1 Cache 256 KB L2 Cache 1 MB L3 Cache 8 MB 64 bit Processing Yes Process Technology 45 nm Processor Technology Virtualization Technology Processor Technology Hyper Threading Technology Processor Technology Extended Memory 64 Technology Processor Technology Enhanced SpeedStep Technology Processor Socket Socket B