RackStation 12-bay 2U Rack Mount Quad Core Storage Server (Synology RS2418+) - Intel Atom C3538 Processor (2.1GHz, 4 cores), 4 GB DDR4 non-ECC UDIMM (1 x 4GB, 4 slots free, 64GB Max), 180 TB, 12 Hard Drive Bays up to 24-bay, No Optical Drive, 4 x GbE LAN, Redundant Power, Connectivity: 2 x USB3.0, 1 x Expansion Port, 500W Power Supply, No Operating System, 2U Rackmountable