The Intel Xeon L5640 was a server/workstation processor with 6 cores, launched in March 2010. It is part of the Xeon lineup, using the Westmere-EP architecture with Socket 1366. Thanks to Intel Hyper-Threading the core-count is effectively doubled, to 12 threads. To further increase overall system performance, up to two Xeon L5640 CPUs can link up in a multi-processor (SMP) configuration. Xeon L5640 has 12 MB of L3 cache and operates at 2.266 GHz by default, but can boost up to 2.8 GHz, depending on the workload. Intel is building the Xeon L5640 on a 32 nm production process using 1,170 million transistors. The multiplier is locked on Xeon L5640, which limits its overclocking capabilities.
With a TDP of 60 W, the Xeon L5640 consumes typical power levels for a modern PC. Intel's processor supports DDR3 memory with a triple-channel interface. ECC memory is supported, too, which is an important capability for mission-critical systems, to avoid data corruption. For communication with other components in the machine, Xeon L5640 uses a PCI-Express Gen 2 connection. This processor lacks integrated graphics, you might need a graphics card.
Hardware virtualization is available on the Xeon L5640, which greatly improves virtual machine performance.