SYNOLOGY | RACKSTATION | RS-SERIES | NAS MEMORY

Memory for Synology RackStation rackmount NAS — 13 RS models, each matched to the module its unit actually takes.

The form factor splits by chassis, not by capability. The full-depth units — RS1619xs+, RS2421+, RS2423+, RS2821RP+, RS3618xs, RS3621xs+, RS3621RPxs and RS4021xs+ — take full-size ECC UDIMM. The short-depth 1U units — RS822+, RS822RP+ and RS1221+ — take ECC SODIMM, because there isn't room for a full-height DIMM. Same ECC requirement, different module, and the capacity on the label won't tell you which.

The RS820+ is the exception: non-ECC SODIMM, the only RackStation in the range that doesn't require error correction.

Everything here is DDR4-2666. The RP suffix — RS2423RP+, RS3621RPxs, RS822RP+ — denotes redundant power supply and makes no difference to memory; the RP and non-RP versions of a model take the same module.

Memory matters more on a RackStation than a DiskStation. These are multi-user, always-on units running Btrfs snapshots, Active Backup for Business, and often virtual machines — workloads where DSM will page under concurrent load long before the drives are the limit. Synology publishes an official maximum per model, and it's frequently lower than the slots would physically accept.

Use Shop by System Model to filter to your unit, or send us the model and we'll confirm the part, the slot count and the supported ceiling.

Lifetime warranty on every module. Purchase orders, net terms and volume pricing for business, government and education buyers.

See also: Synology FlashStation Memory · Synology DiskStation Memory · Synology NAS Memory by Part Number