Synology RS815 , High-performance Rackmount NAS server, INTEL Atom C2538 Quad Core 2.4 GHz, 2 GB DDR3 expandible up to 6GB, 4 drive bays expanidble up to 8-bays with expansion unit. Compatible with 3.5″ SATA III SATA II HDD, 2.5″ SATA III SATA II HDD, 2.5″ SATA III SATA II SSD, Maximum Internal Raw Capacity 32 TB (8 TB HDD X 4), Quad Gigabit LAN ports for failover and Link Aggregation support. 2x USB 3.0 Ports, 1x eSATA Port, 1x 250W PSU Dimension 44 mm X 430.5 mm X 457.5 mm
