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Compact black four-bay desktop NAS with matte finish and front drive trays

Synology Inc.

Synology Inc. DS925+ 4-bay NAS 4GB DDR4

SKU CH-12MF-QNCDD MPN DS925+

A four-bay desktop NAS with 4 GB DDR4 ECC memory, dual 2.5GbE ports and up to 522/565 MB/s sequential speeds for multi-user file sharing and backup

  • Form factor4-bay;4 GB DDR4 ECC SODIMM
  • Power draw37.91 W (Access) 12.33 W (HDD Hibernation)
  • Drive interface4 x SATA (4 x Bay)
  • Installed RAM4-bay;4 GB DDR4
  • Maximum RAM capacity32 GB (16 GB x 2)
  • RAM slots2 x DDR4 SODIMM

Model DS925+

  • Four drive bays expand storage up to nine drives
  • 4 GB DDR4 ECC memory scales to 32 GB
  • Dual 2.5GbE ports with link aggregation
  • 522 MB/s read and 565 MB/s write speeds
  • Diskless design lets you choose drives

Four-bay desktop NAS for home and small offices

The Synology DS925+ is a diskless four-bay desktop NAS designed for users who want a personal cloud for file sharing, media streaming and backup. It ships with 4 GB of DDR4 ECC SODIMM memory installed and two SODIMM slots that support expansion up to 32 GB.

Tool-less drive trays and dual 2.5GbE ports

Drive installation uses tool-less trays that slide into the four SATA bays, so adding or replacing disks requires no screws. Two built-in 2.5GbE RJ-45 ports provide link aggregation for failover or load balancing, but the unit has no 10GbE or SFP+ connectivity for faster uplinks.

SATA interface limits sequential throughput

The four SATA bays deliver up to 522 MB/s sequential read and 565 MB/s sequential write, which is the practical ceiling of the SATA interface itself. Workloads that demand sustained throughput beyond those figures will be constrained by the drive interface rather than the network ports.

How it compares

Measured against everything we stock in Multi-Bay Desktop NAS, at today’s prices. Recalculated every night.

Price $664.99
Pricier than about 55% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameSynology
Product lineDiskStation
Model nameDS925+
Product typeDesktop NAS
Recommended useBackup & stream media through personal cloud
Memory
Installed RAM4-bay;4 GB DDR4
Maximum RAM capacity32 GB (16 GB x 2)
RAM slots2 x DDR4 SODIMM
Storage
Drive interface4 x SATA (4 x Bay)
Drives includedDiskless System
Connectivity
Protocol supportSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS
Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP,
CalDAV
Power
Power draw37.91 W (Access)
12.33 W (HDD Hibernation)
Power details100 V to 240 V AC
Size & build
Form factor4-bay;4 GB DDR4 ECC SODIMM
Product dimensions166 mm × 199 mm × 223 mm
Product weight2.26 kg
Shipping weight3.70 kg
Package size279 × 254 × 254 mm
In the box
In the boxMain Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Environment & compliance
Temperature rangeOperating Temperature : 0 °C to 40 °C (32 °F to 104 °F)
Storage Temperature : -20 °C to 60 °C (-5 °F to 140 °F)
Humidity range5% to 95% RH

Other versions of this model

5 more in the same range

Questions about this item

How do I confirm the DS925+ is running correctly after setup?

Log into DSM and check that all four drive bays show healthy status, then verify network throughput reaches the rated 522 MB/s read and 565 MB/s write on the 2.5GbE ports.

What ships with the DS925+ and which drives must I buy separately?

The box contains the main unit, accessory pack, AC adapter, power cord and two RJ-45 cables; SATA hard drives or SSDs are not included and must be purchased separately.

Should I choose the 4 GB model or upgrade to the 32 GB maximum?

The DS925+ ships with 4 GB DDR4 ECC SODIMM and supports up to 32 GB via two slots; add memory only if you run virtual machines or heavy database workloads.

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