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Silver 1U rackmount NAS chassis with four drive bays visible behind front cover, dual power supplies at rear

Synology Inc.

Synology RS1626xs+ Xeon D-1726 4-Bay Rackmount NAS 16GB 3.2TB Cache 80TB Drives

SKU CH-DH3X-82C74

A 4-bay 1U rackmount NAS with Xeon D-1726 CPU, 16GB DDR4, 3.2TB NVMe cache and 80TB of enterprise drives, fully assembled

  • CPUIntel Xeon
  • Form factor4-Bay
  • LAN ports2 x RJ-45 10GbE LAN Port 1 x Out-of-Band Management LAN Port
  • USB ports2 x USB 3.2 Gen 1 Ports
  • Installed RAM16 GB
  • Drives included80 TB (4 × 20 TB)
  • Enterprise 6-core Xeon D-1726 handles virtualization and heavy workloads
  • 16GB DDR4 ECC memory protects data integrity under load
  • Dual 10GbE RJ-45 ports deliver high-throughput network connectivity
  • 2TB NVMe cache accelerates frequent read and write operations
  • 80TB enterprise drives provide massive storage capacity out of the box

Enterprise Rackmount NAS

The Synology RS1626xs+ is a 1U rackmount NAS built around an Intel Xeon D-1726 six-core processor with 16GB of DDR4 ECC memory. It ships fully assembled with four 20TB enterprise drives providing 80TB of raw capacity and two 1.6TB NVMe cache modules totalling 3.2TB. The platform targets businesses that need high-throughput file sharing, virtualization hosting, backup consolidation, or surveillance storage in a compact four-bay form factor.

Thermals Noise Power

The chassis operates within a 5°C to 35°C ambient range and draws power from dual 100-240 VAC supplies at 50/60Hz. Two integrated 10GbE RJ-45 ports and a dedicated 1GbE management link handle network traffic without additional cards. A PCIe Gen4 x8 slot remains available for further I/O expansion while the system runs its standard workloads.

Upgrade Path Limits

The four-bay design caps internal drive count at four units, so organisations planning more than 80TB of raw storage must add a compatible Synology expansion unit to reach the 16-drive maximum. Memory can grow to 64GB for heavier virtualization, but the single PCIe slot and fixed bay layout limit further internal upgrades. Buyers who need more than four drives today should evaluate larger chassis options.

How it compares

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

Price $10,190.99
Pricier than about 71% 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 included80 TB (4 × 20 TB)
Connectivity
Management optionsWeb-Based, DHCP Client
Ports & slots
LAN ports2 x RJ-45 10GbE LAN Port
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

How do I install the RS1626xs+ into a standard 1U rack and which step is often missed?

Mount the 44 mm high unit using the included accessory pack, connect both C13 to C14 power cords for redundancy, link the two 10GbE RJ-45 ports and the dedicated out-of-band management LAN port, then power on. The step most often missed is cabling the separate management port before first boot.

What maintenance or replacement will the RS1626xs+ need over time?

The four 20 TB enterprise drives and two 1.6 TB NVMe cache modules are field-replaceable; plan to swap any drive that SMART flags as degraded and replace cache SSDs once their write-endurance rating is reached. Memory can be expanded later with DDR4 ECC RDIMMs up to 64 GB total.

What is the first limit reached under sustained heavy workloads on the RS1626xs+?

The operating temperature ceiling of 35 °C is typically the first constraint; continuous high I/O across the 10GbE links and NVMe cache can push the 1U chassis to that limit, triggering fan-speed increases and possible throttling if airflow is insufficient.

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