・ RS1619XS+is a 1U -rack -mounted NAS with an upgraded memory and an M.2 SSD cache configuration, which meets the needs of modern companies seeking flexible, reliable, efficient storage solutions.- CPU model Intel Xeon D-1527 CPU architecture 64-bit CPU frequency Quad Core 2.2 (Base) / 2.7 (Turbo) GHz < / TD> System Memory 8 GB DDR4 ECC UDIMM Pre -installed memory module 8 GB (8 GB x 1) Number of memory slots 4 Memory extension maximum 64 GB (16 GB x 4) Drive Bay 4 Maximum number of bays when using an expansion unit 16 M.2 drive slot 2 (nvme & amp; sata) Compatible drive type* (Click here for all supported drives) 3.5 "Sata HDD, 2.5" Sata HDD, 2.5 "Sata SSD, M.2 2280 NVME & AMP; SATA SSD Maximum internal living capacity 56 TB (14 TB Drive X 4) (Capacity depends on the RAID type) Maximum RAW capacity by extended unit 224 TB (56 TB + 14 TB Drive X 12) (capacity depends on the RAID type) Maximum single volume size 200 TB (32GB RAM required, RAID 5 or RAID 6 group only) 108 tb outer dimensions (height x width x depth) 44 mm x 480 mm x 518.6 mm Weight 8.16 kg Rack Intration Support 4 pillars 19 inch (Synology Rail Kit -RKM114/RKS1317)