RS1619xs+ (Redundant Power Supply) 4-Bay / 1U Rackmount / Intel Xeon D-1527 / Quad Core 2.2 - 2.7 GHz / 8GB DDR4 ECC UDIMM (up to 64GB ECC UDIMM) / 2 x USB 3.0, 1 x Expansion / 4 x Gigabit LAN / 1 x PCIe x8 Slot for NIC / RAID 0,1,5,6,10,F1 / Synology High Availability / 2 x IP Cam Licenses (up to 75) / 5 Years Warranty Optional Rail Kit: Sliding (RKS1317), Mounted (RKM114) Expansion: RX1217, RX1217RP Synology 10GbE NIC: E10G18-T1, E10G18-T2, E10G17-F2