The Cisco UCS® C420 M3 Rack Server is a high-density, 4-socket, 2-rack-unit (2RU) rack server designed for computing, I/O, storage, and memory-intensive standalone applications. The Cisco UCS C420 M3 extends the capabilities of the Cisco Unified Computing System™ (Cisco UCS) using Intel Xeon processor E5-4600 Series multicore processors to deliver increased performance and efficiency.