The Intel Xeon L5638 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 L5638 CPUs can work together in a multi-processor (SMP) configuration. Xeon L5638 has 12 MB of L3 cache and operates at 2000 MHz by default, but can boost up to 2.4 GHz, depending on the workload. Intel is making the Xeon L5638 on a 32 nm production node using 1,170 million transistors. The multiplier is locked on Xeon L5638, which limits its overclocking potential.
With a TDP of 60 W, the Xeon L5638 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 system, Xeon L5638 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 L5638, which greatly improves virtual machine performance.