RS3618xs 12-Bay / 2U Rackmount / INTEL Xeon D-1521 / Quad Core 2.4GHz (burst up to 2.7GHz) / 8 GB DDR4 ECC UDIMM (up to 64GB ECC UDIMM) / 2 x USB 3.0, 2 x Expansion / 4 x Gigabit LAN / 2 x PCIe x8 Slot for NIC / RAID 0,1,5,6,10 / Synology High Availability / 2 x IP Cam Licenses (up to 75) / 5 Years Warranty / Optional Rail Kit Sliding (RKS1317)