Overview Reviews Product Description Special Order! AMD RyzenTM V1500B quadcore 2.2 GHz, 4 GB DDR4 ECC SODIMM RAM (2 slots, Upgradable to 32GB, 2x 16GB Max), 8x 3.5" or 2.5" Drive Bays (Max of 18 bays with expansion), 2x M.2 2280 NVMe , 4x USB 3.2 Gen 1, 2x eSATA, 4x Gigabit LAN, 1x PCIe Gen3 x8 Slot (x4 Link), Maximum 40 IP Cams. Compatible RAM Models: D4ECSO266616G (DDR4 ECC SODIMM) 16GB D4ES018G (DDR4 ECC SODIMM) 8GB D4ES014G (DDR4 ECC SODIMM) 4GB Expansion Unit Available DX517 (5 Additional Bays) Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Synology Synology DS1821+ 8 Bay Atom 2.1GHz QC 4GB RAM NAS 3Yr Wty Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments