Intel Xeon Quad Core SLBFD E5520 2.26GHz 8MB LGA1366 Processor - Features: Number of Cores: 4 - Number of Threads: 8 - Clock Speed: 2.26 GHz - Intel Smart Cache: 8 MB - Intel QPI Speed: 5.86 GT/s - Instruction Set: 64-bit - Max Memory Size: 144 GB - Memory Types: DDR3 1066/800 - Number of Memory Channels: 3 - ECC Memory Supported: Yes - Intel Turbo Boost Technology: Yes - Intel Hyper-Threading Technology: Yes - Intel Virtualization Technology (VT-x): Yes - Intel VT-x with Extended Page Tables (EPT): Yes - Intel 64: Yes - Enhanced Intel SpeedStep Technology : Yes