Synology (4GB DDR3 RAM Module) – Synology 4GB DDR3 RAM Module
DDR3-1600 unbuffered So-DIMM 204pin CL=11 1.5V
Applied models
DS2015xs, DS2415+, DS1815+, DS1515+, RS815+/RS815RP+

Synology (RC18015xs+&RXD1215sas) – RC18015xs+ (Redundant Power Supply)1U Rackmount / INTEL Xeon E3 Quad Core 3.3GHz / 8GB DDR3 ECC RAM (up to 32GB) / 2 x USB 3.0, 1 x Mini SAS-Out / 5 x Gigabit LAN with 1 for Heartbeat Connection / 1 x PCIe x8 Slot for NIC / Synology High Availability / 2 x IP Cam Licenses (up to 90) / 5 Years Warranty / Optional Rail Kit Sliding (RKS1317) / Optional 10GbE Network Capability (E10G15-F1) / Can link up with max. 15pcs RXD1215sas as 180-Bay NASRXD1215sas (Redundant Power Supply)12-Bay (SAS ONLY) / 2U Rackmount / 2 x Mini SAS-IN, 2 x Mini SAS-OUT / Synchronized with RC18015xs+ / RAID 0,1,5,6,10 / 5 Years Warranty