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Silver 1U rackmount NAS, four drive bays, front panel LEDs, dual power supplies

Synology Inc.

Synology RS1626xs+ Xeon D-1726 16GB 48TB 25GbE rackmount NAS

SKU CH-DNMF-SD3B1

A 4-bay 1U rackmount NAS with a Xeon D-1726 processor, 16GB DDR4, dual 10GbE and dual 25GbE ports, plus 48TB of enterprise drives pre-installed

  • CPUIntel Xeon
  • Form factor4-Bay
  • LAN ports2 x RJ-45 10GbE LAN Ports 2 x SFP28 25GbE Ports via Synology
  • USB ports2 x USB 3.2 Gen 1 Ports
  • Installed RAM16 GB
  • Drives included48 TB (4 × 12 TB)
  • Enterprise performance from Intel Xeon D-1726 6-core processor with 16GB DDR4 ECC memory
  • High-speed connectivity via dual 10GbE RJ-45 and dual 25GbE SFP28 ports
  • Massive 48TB raw capacity from four 12TB Synology Enterprise NAS drives
  • Scalable storage architecture supporting up to 16 drives with expansion units
  • Compact 1U rackmount form factor measuring 44mm height for dense deployments

Ready-to-run 4-bay Xeon NAS

The Synology RS1626xs+ arrives fully assembled with an Intel Xeon D-1726 processor, 16GB DDR4 ECC memory, and four 12TB enterprise drives for 48TB raw capacity. Dual 10GbE RJ-45 ports and a two-port 25GbE SFP28 card are already installed. It targets IT teams that need immediate deployment for virtualization, backup, or high-throughput file services.

Replaces slower 1GbE or direct-attached storage

The jump is worth it when workloads saturate gigabit links or when snapshot and replication tasks demand ECC memory and hardware-accelerated encryption. The 25GbE adapter removes the network bottleneck for clustered applications. Buyers who only need basic file sharing on a single gigabit link will not use the headroom.

Rack-mount install with PCIe and M.2 expansion

The 1U chassis slides into a standard rack using the included rails and dual C13 power cords. Dual M.2 NVMe slots and a PCIe Gen4 x8 slot are accessible after removing the top cover. The main risk is forgetting to license the 25GbE transceivers or exceeding the 35 °C intake limit in dense cabinets.

How it compares

Measured against everything we stock in Rack-Mounted NAS Servers, at today’s prices. Recalculated every night.

Price $7,629.99
Pricier than about 57% of the 763 comparable items (median $6,564.99).

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Specifications

Product
Brand nameSynology
Model nameRS1626xs+
Processor
CPUIntel Xeon
Memory
Installed RAM16 GB
Storage
Drives included48 TB (4 × 12 TB)
Connectivity
Management optionsWeb-Based, DHCP Client
Ports & slots
LAN ports2 x RJ-45 10GbE LAN Ports
2 x SFP28 25GbE Ports via Synology PCIe Card
1 x Out-of-Band Management LAN Port
USB ports2 x USB 3.2 Gen 1 Ports
Power
Power details100-240 VAC 50/60 Hz
Size & build
Form factor4-Bay
Product dimensions44 mm × 481.9 mm × 668.5 mm
Product weight9.5 kg
In the box
In the boxMain Unit × 1
Accessory Pack × 1
C13 to C14 power cord × 2
Front Cover × 1
All Configuration Items
Environment & compliance
Temperature range5 °C - 35 °C
Humidity range8% to 80% RH
More details
Indicator lightsPower, HDD (Hard Disk Drive), LAN (10/100)

Questions about this item

Will the 44 mm high RS1626xs+ fit in a standard 1U rack space with the included front cover attached?

Yes, the unit is exactly 44 mm tall, matching a 1U rack opening, and the supplied front cover mounts flush without adding height.

After racking the 9.5 kg unit and inserting the four 12 TB drives, which step do installers most often skip before powering on?

Connecting both C13-to-C14 power cords to separate circuits for redundancy; the system will boot on one, but dual feeds are required for full high-availability operation.

The Xeon D-1726 system ships with 16 GB DDR4 ECC RDIMM — what is the maximum memory it can accept later?

The platform supports up to 64 GB of DDR4 ECC RDIMM across its slots, allowing a future upgrade from the factory 16 GB configuration.

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