Synology Quad bay NAS DiskStation DS923+

CPU

CPU Model

AMD Ryzen R1600

CPU Quantity

1

CPU Architecture

64-bit

CPU Frequency

2-core 2.6 (base) / 3.1 (turbo) GHz

Hardware Encryption Engine (AES-NI)

Yes

Memory

System Memory

4 GB DDR4 ECC SODIMM

Memory Module Pre-installed

4 GB (4 GB x 1)

Total Memory Slots

2

Maximum Memory Capacity

32 GB (16 GB x 2)

Notes

• Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
• Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
• For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.

Storage

Drive Bays

4

Maximum Drive Bays with Expansion Unit

9 (DX517 x 1)

M.2 Drive Slots

2 (NVMe)

Compatible Drive Type* (See all supported drives)

• 3.5" SATA HDD
• 2.5" SATA SSD
• M.2 2280 NVMe SSD

Hot Swappable Drive*

Yes

Notes

• The hot swappable drive feature is not supported by M.2 SSD slots.
• "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.

External Ports

RJ-45 1GbE LAN Port

2 (with Link Aggregation / Failover support)

USB 3.2 Gen 1 Port*

2

eSATA Port

1

Notes

• This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
• The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.

PCIe

PCIe Expansion

1 x Gen3 x2 network upgrade slot

Appearance

Size (Height x Width x Depth)

166 mm x 199 mm x 223 mm

Weight

2.24 kg

Others

System Fan

92 mm x 92 mm x 2 pcs

Fan Speed Mode

• Full-Speed Mode
• Cool Mode
• Quiet Mode

Brightness Adjustable Front LED Indicators

Yes

Power Recovery

Yes

Noise Level*

22.9 dB(A)

Scheduled Power On / Off

Yes

Wake on LAN / WAN

Yes

Power Supply Unit / Adapter

100 W

AC Input Power Voltage

100V to 240V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption

35.51 W (Access)
11.52 W (HDD Hibernation)

British Thermal Unit

121.09 BTU/hr (Access)
39.28 BTU/hr (HDD Hibernation)

Notes

• For more information on how power consumption is measured, refer to this article.
• Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two GRAS 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%

Temperature

Operating Temperature

0°C to 40°C (32°F to 104°F)

Storage Temperature

-20°C to 60°C (-5°F to 140°F)

Relative Humidity

5% to 95% RH

Certification

• FCC
• CE
• BSMI
• VCCI
• RCM
• UKCA
• EAC
• CCC
• KC

Warranty

3-year hardware warranty, extendable to 5 years with Extended Warranty Plus

Notes

The warranty period starts from the purchase date as stated on your purchase receipt. 

Environment

RoHS Compliant

Packaging Content

• Main Unit X 1
• Accessory Pack X 1
• AC Power Adapter X 1
• AC Power Cord X 1
• RJ-45 LAN Cable X 2
• Quick Installation Guide X 1

Optional Accessories

• DDR4 ECC SODIMM: D4ES02-4G/D4ES02-8G/D4ES01-16G
• Expansion Units: DX517
• Enterprise Series 3.5" SATA HDD: HAT5300 Series
• Plus Series 3.5" SATA HDD: HAT3300 Series
• Enterprise Series 2.5" SATA SSD: SAT5200 Series
• Enterprise Series M.2 2280 NVMe SSD: SNV3400 Series
• 10GbE Network Upgrade Module: E10G22-T1-Mini

DSM Specifications

Storage Management

Maximum Single Volume Size

108 TB

Maximum Internal Volume Number

64

M.2 SSD Storage Pool Support*

Yes

SSD Read / Write Cache (White Paper)

Yes

SSD TRIM

Yes

Supported RAID Type

• Synology Hybrid RAID
• Basic
• JBOD
• RAID 0
• RAID 1
• RAID 5
• RAID 6
• RAID 10

RAID Migration

• Basic to RAID 1
• Basic to RAID 5
• RAID 1 to RAID 5
• RAID 5 to RAID 6

Volume Expansion with Larger HDDs

• Synology Hybrid RAID
• RAID 1
• RAID 5
• RAID 6
• RAID 10

Volume Expansion by Adding a HDD

• Synology Hybrid RAID
• JBOD
• RAID 5
• RAID 6 (with Expansion Unit)

Global Hot Spare Supported RAID Type

• Synology Hybrid RAID
• RAID 1
• RAID 5
• RAID 6 (with Expansion Unit)
• RAID 10 (with Expansion Unit)

Notes

• Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. 
• Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
• Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
• Each internal volume (may consist of multiple drives) is expandable up to 108TB.

File System

Internal Drives

• Btrfs
• ext4

External Drives

• Btrfs
• ext4
• ext3
• FAT
• NTFS
• HFS+
• exFAT

File Services

File Protocol

• SMB
• AFP
• NFS
• FTP
• WebDAV
• Rsync

Maximum Concurrent SMB/AFP/FTP Connections

1,000

Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)

2,000

Windows Access Control List (ACL) Integration

Yes

NFS Kerberos Authentication

Yes

Notes

• Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
• The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.

Account & Shared Folder

Maximum Local User Accounts

2,048

Maximum Local Groups

256

Maximum Shared Folder

512

Maximum Shared Folder Sync Tasks

16

Hybrid Share

Hybrid Share Folder Number

10

Hyper Backup

Folder and Package Backup

Yes

Entire System Backup

Yes

Notes

Full-system backup requires DSM 7.2 or later.

High Availability

Synology High Availability

Yes

Log Center

Syslog Events per Second

800

Virtualization

VMware ESXi 6.5 and VAAI

Yes

Windows Server 2022

Yes

Citrix Ready

Yes

OpenStack

Yes

General Specifications

Supported Protocols

SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

Supported Browsers

• Chrome
• Firefox
• Edge
• Safari

Supported Language

English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文

Notes

For an updated list of supported browser versions, check the DSM Technical Specifications.

Add-on Packages

Antivirus by McAfee (Trial)

Yes

Central Management System

Yes

Synology Chat

Suggested Concurrent Users

100

Notes

• Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
• When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.

Download Station

Maximum Concurrent Download Tasks

80

SAN Manager

Maximum iSCSI Target Number

128

Maximum LUN

256

LUN Clone/Snapshot, Windows ODX

Yes

Synology MailPlus / MailPlus Server

Free Email Accounts

5 (Additional accounts require purchase of licenses)

Suggested Maximum Users

500

Suggested Concurrent Users

100

Maximum Server Performance

1,224,000 emails per day, approx. 37GB

Notes

• For tested models with expandable memory, the maximum amount of RAM was installed.
• The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
• Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).

Media Server

DLNA Compliance

Yes

Synology Photos

Facial Recognition

Yes

Object Recognition

Yes

Snapshot Replication

Maximum Snapshots per Shared Folder

1,024

Maximum of System Snapshots

65,536

Surveillance Station

Default Licenses

2 (Additional cameras require purchase of licenses)

Maximum IP Cameras and Total FPS (H.264)

• 720p: 40 channels, 1200 FPS
• 1080p: 40 channels, 1050 FPS
• 3M: 40 channels, 600 FPS
• 5M: 30 channels, 360 FPS
• 4K: 20 channels, 200 FPS

Maximum IP Cameras and Total FPS (H.265)

• 720p: 40 channels, 1200 FPS
• 1080p: 40 channels, 1200 FPS
• 3M: 40 channels, 1000 FPS
• 5M: 40 channels, 600 FPS
• 4K: 30 channels, 300 FPS

Notes

• Performance figures are obtained from testing conducted with the device fully populated with drives under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
• Use NVR Selector to quickly find a suitable model based on your requirements.

Synology Drive

Recommended Number of Concurrent Sync Clients

350 (the number of connections that can be maintained when the recommended number of hosted files was reached)

Recommended Number of Hosted Files

5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)

Notes

• Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
• Utilizing SSD cache can significantly improve performance.
• For tested models with expandable memory, the maximum amount of RAM was installed.
• Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

Synology Office

Suggested Maximum Users

3,000

Suggested Concurrent Users

1,200

Notes

• Multiple files were opened for testing and each file was edited by 30 users simultaneously.
• For tested models with expandable memory, the maximum amount of RAM was installed.
• Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

Video Station

Virtual Machine Manager

Recommended Virtual Machine Instances

4

Recommended Virtual DSM Number (Licenses required)

4 (including 1 Free License)

Notes

The specifications vary depending on system configuration and memory size.

VPN Server

Maximum Connections

40