Xeon W5590 is a server/workstation processor from Intel released on 9 August 2009, and it is in end-of-life production status now. It belongs to Xeon family and has a Gainestown architecture. This processor is built on Intel Socket 1366, and uses Gen 2 PCI express connection. 45 nm process is used in production.
Processor has 4 cores and 8 threads, with the base frequency of 3.333 GHz. It has DDR3 Triple-channel memory support. As for the cache, it supports L1 64K (per core), L2 256K (per core) and L3 8MB (shared).