1. products list

Comparison results

DS423 DS620slim
Hardware Specs
Hardware Specifications
CPU
CPU Model Realtek RTD1619B Intel Celeron J3355
CPU Quantity 1 1
CPU Core 4 2
CPU Architecture 64-bit 64-bit
CPU Frequency 1.7 GHz 2.0 (base) / 2.5 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 2 GB DDR4 non-ECC 2 GB DDR3 non-ECC SODIMM
Memory Module Pre-installed 2 GB (2 GB x 1)
Total Memory Slots 2
Maximum Memory Capacity 6 GB (2 GB + 4 GB)
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.
  • 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.
Storage
Drive Bays 4 6
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA SSD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
External Ports
RJ-45 1GbE LAN Port 2 2
USB 3.2 Gen 1 Port 2 2
Notes MTU value of 1GbE LAN port has a limit of 1500.
Appearance
Size (Height x Width x Depth) 184 mm x 168 mm x 230 mm 121 mm x 151 mm x 175 mm
Weight 2.21 kg 1.4 kg
Others
System Fan 80 mm x 80 mm x 2 pcs 80 mm x 80 mm x 1 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 20.6 dB(A) 20.5 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 90 watts 65 watts
AC Input Power Voltage 100V to 240V AC 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption 32.41 watts (Access)
4.97 watts (HDD Hibernation)		 34.88 watts (Access)
7.59 watts (HDD Hibernation)
British Thermal Unit 110.52 BTU/hr (Access)
16.95 BTU/hr (HDD Hibernation)		 119.1 BTU/hr (Access)
25.92 BTU/hr (HDD Hibernation)
Notes
  • For more information on how power consumption is measured, refer to this article.
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10JFCX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with WD 1TB WD10JFCX hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 17.2 dB(A); Temperature: 23.6˚C; Humidity: 58.2%.
Temperature
Operating Temperature 0°C to 40°C (32°F to 104°F) 5°C to 40°C (40°F to 104°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH 8% to 80% RH
Storage Humidity 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
Warranty 2-year hardware warranty, extendable to 4 years with Extended Warranty Plus 2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
Notes
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
Environment RoHS Compliant 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
  • Main Unit 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
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size 108 TB 108 TB
Maximum Internal Volume Number 64 64
SSD Read/Write Cache (Determining cache size)
SSD TRIM
Supported RAID Type
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • 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
  • 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
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • 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.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • 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.
File System
Internal Drives
  • Btrfs
  • ext4
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based) 5 5
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
  • SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
    • Test workload: HomeFolder scenario provided by the FSCT tool
    • Test duration: 600 seconds
    • Domain controller & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
  • Connection value of this model is tested with Synology SATA SSD fully populated and all onboard network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
    • Test workload: HomeFolder scenario provided by the FSCT tool
    • Test duration: 600 seconds
    • Domain controller & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
Account & Shared Folder
Maximum Local User Accounts 256 512
Maximum Local Groups 64 128
Maximum Shared Folder 64 128
Maximum Shared Folder Sync Tasks 2 4
Hybrid Share
Hybrid Share Folder Number 10
Hyper Backup
Folder and Package Backup
Entire System Backup
Notes Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 400 800
Virtualization
VMware vSphere ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
Microsoft Hyper-V Windows Server 2019, Windows Server 2016
Citrix XenServer XenServer 7
OpenStack Cinder
General Specifications
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Safari
  • 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 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. For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
Synology AI Console
Third-Party AI Model Integration
Synology Chat
Download Station
Maximum Concurrent Download Tasks 80 80
SAN Manager
Maximum iSCSI Target Number 2 2
Maximum LUN 4 4
LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Additional accounts require purchase of licenses)
Maximum Number of Users 10
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Object Recognition
Notes Object recognition requires an upgrade of memory capacity to a minimum of 4 GB.
Snapshot Replication
Maximum Snapshots per Shared Folder 128 128
Maximum Snapshots per LUN 32 32
Maximum Snapshots per System 1,024 1,024
Maximum Replication Tasks for Shared Folders 16 16
Maximum Replication Tasks for LUNs 8 8
Maximum Replication Tasks per System 16 16
Surveillance Station
Default Licenses 2 (Additional cameras require purchase of licenses) 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
  • 1080p: 30 channels, 600 FPS
  • 3M: 30 channels, 300 FPS
  • 5M: 20 channels, 200 FPS
  • 4K: 15 channels, 150 FPS
  • 1080p: 25 channels, 600 FPS
  • 3M: 25 channels, 350 FPS
  • 5M: 20 channels, 250 FPS
  • 4K: 12 channels, 120 FPS
Maximum IP Cameras and Total FPS (H.265)
  • 1080p: 30 channels, 800 FPS
  • 3M: 30 channels, 500 FPS
  • 5M: 30 channels, 450 FPS
  • 4K: 20 channels, 200 FPS
  • 1080p: 25 channels, 750 FPS
  • 3M: 25 channels, 450 FPS
  • 5M: 25 channels, 250 FPS
  • 4K: 20 channels, 200 FPS
Notes
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and 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.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and 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.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Synology Drive
Maximum Number of Users 5 5
Maximum Number of Hosted Files 100,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 100,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Number of Users 5 5
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Recommended Virtual Machine Instances 2 (Learn more)
Recommended Virtual DSM Number (Licenses required) 2 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 2 4
Hardware Specs
Hardware Specifications
CPU
CPU Model
DS423 Realtek RTD1619B
DS620slim Intel Celeron J3355
CPU Quantity
DS423 1
DS620slim 1
CPU Core
DS423 4
DS620slim 2
CPU Architecture
DS423 64-bit
DS620slim 64-bit
CPU Frequency
DS423 1.7 GHz
DS620slim 2.0 (base) / 2.5 (turbo) GHz
Hardware Encryption Engine
DS423
DS620slim
Memory
System Memory
DS423 2 GB DDR4 non-ECC
DS620slim 2 GB DDR3 non-ECC SODIMM
Memory Module Pre-installed
DS423
DS620slim 2 GB (2 GB x 1)
Total Memory Slots
DS423
DS620slim 2
Maximum Memory Capacity
DS423
DS620slim 6 GB (2 GB + 4 GB)
Notes
DS423 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.
DS620slim
  • 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.
Storage
Drive Bays
DS423 4
DS620slim 6
Drive Type (See all supported drives)
DS423
  • 3.5" SATA HDD
  • 2.5" SATA SSD
DS620slim
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
DS423
DS620slim
External Ports
RJ-45 1GbE LAN Port
DS423 2
DS620slim 2
USB 3.2 Gen 1 Port
DS423 2
DS620slim 2
Notes
DS423 MTU value of 1GbE LAN port has a limit of 1500.
DS620slim
Appearance
Size (Height x Width x Depth)
DS423 184 mm x 168 mm x 230 mm
DS620slim 121 mm x 151 mm x 175 mm
Weight
DS423 2.21 kg
DS620slim 1.4 kg
Others
System Fan
DS423 80 mm x 80 mm x 2 pcs
DS620slim 80 mm x 80 mm x 1 pcs
Fan Speed Mode
DS423
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
DS620slim
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
DS423
DS620slim
Brightness Adjustable Front LED Indicators
DS423
DS620slim
Power Recovery
DS423
DS620slim
Noise Level*
DS423 20.6 dB(A)
DS620slim 20.5 dB(A)
Scheduled Power On / Off
DS423
DS620slim
Wake on LAN / WAN
DS423
DS620slim
Power Supply Unit / Adapter
DS423 90 watts
DS620slim 65 watts
AC Input Power Voltage
DS423 100V to 240V AC
DS620slim 100V to 240V AC
Power Frequency
DS423 50/60 Hz, Single Phase
DS620slim 50/60 Hz, Single Phase
Power Consumption
DS423 32.41 watts (Access)
4.97 watts (HDD Hibernation)
DS620slim 34.88 watts (Access)
7.59 watts (HDD Hibernation)
British Thermal Unit
DS423 110.52 BTU/hr (Access)
16.95 BTU/hr (HDD Hibernation)
DS620slim 119.1 BTU/hr (Access)
25.92 BTU/hr (HDD Hibernation)
Notes
DS423
  • For more information on how power consumption is measured, refer to this article.
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
DS620slim
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10JFCX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with WD 1TB WD10JFCX hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 17.2 dB(A); Temperature: 23.6˚C; Humidity: 58.2%.
Temperature
Operating Temperature
DS423 0°C to 40°C (32°F to 104°F)
DS620slim 5°C to 40°C (40°F to 104°F)
Storage Temperature
DS423 -20°C to 60°C (-5°F to 140°F)
DS620slim -20°C to 60°C (-5°F to 140°F)
Operating Humidity
DS423 8% to 80% RH
DS620slim 8% to 80% RH
Storage Humidity
DS423 5% to 95% RH
DS620slim 5% to 95% RH
Certification
DS423
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
DS620slim
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
Warranty
DS423 2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
DS620slim 2-year hardware warranty, extendable to 4 years with Extended Warranty Plus
Notes
DS423
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
DS620slim
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
Environment
DS423 RoHS Compliant
DS620slim RoHS Compliant
Packaging Content
DS423
  • 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
DS620slim
  • Main Unit 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
DS423
DS620slim
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
DS423 108 TB
DS620slim 108 TB
Maximum Internal Volume Number
DS423 64
DS620slim 64
SSD Read/Write Cache (Determining cache size)
DS423
DS620slim
SSD TRIM
DS423
DS620slim
Supported RAID Type
DS423
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS620slim
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
DS423
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
DS620slim
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
DS423
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
DS620slim
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
DS423
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
DS620slim
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
DS423
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
DS620slim
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
DS423
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • 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.
DS620slim
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
  • Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
  • 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.
File System
Internal Drives
DS423
  • Btrfs
  • ext4
DS620slim
  • Btrfs
  • ext4
External Drives
DS423
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
DS620slim
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
DS423
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
DS620slim
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
DS423 5
DS620slim 5
Windows Access Control List (ACL) Integration
DS423
DS620slim
NFS Kerberos Authentication
DS423
DS620slim
Notes
DS423
  • Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
  • SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
    • Test workload: HomeFolder scenario provided by the FSCT tool
    • Test duration: 600 seconds
    • Domain controller & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
DS620slim
  • Connection value of this model is tested with Synology SATA SSD fully populated and all onboard network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
    • Test workload: HomeFolder scenario provided by the FSCT tool
    • Test duration: 600 seconds
    • Domain controller & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
Account & Shared Folder
Maximum Local User Accounts
DS423 256
DS620slim 512
Maximum Local Groups
DS423 64
DS620slim 128
Maximum Shared Folder
DS423 64
DS620slim 128
Maximum Shared Folder Sync Tasks
DS423 2
DS620slim 4
Hybrid Share
Hybrid Share Folder Number
DS423
DS620slim 10
Hyper Backup
Folder and Package Backup
DS423
DS620slim
Entire System Backup
DS423
DS620slim
Notes
DS423
DS620slim Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
DS423
DS620slim
Log Center
DS423
DS620slim
Syslog Events per Second
DS423 400
DS620slim 800
Virtualization
VMware vSphere
DS423
DS620slim ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
Microsoft Hyper-V
DS423
DS620slim Windows Server 2019, Windows Server 2016
Citrix XenServer
DS423
DS620slim XenServer 7
OpenStack
DS423
DS620slim Cinder
General Specifications
Supported Protocols
DS423 SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
DS620slim SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
DS423
  • Chrome
  • Firefox
  • Edge
  • Safari
DS620slim
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
DS423 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
DS620slim 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
DS423 For an updated list of supported browser versions, check the DSM Technical Specifications.
DS620slim For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
DS423
DS620slim
Synology AI Console
DS423
DS620slim
Third-Party AI Model Integration
DS423
DS620slim
Synology Chat
DS423
DS620slim
Download Station
DS423
DS620slim
Maximum Concurrent Download Tasks
DS423 80
DS620slim 80
SAN Manager
DS423
DS620slim
Maximum iSCSI Target Number
DS423 2
DS620slim 2
Maximum LUN
DS423 4
DS620slim 4
LUN Clone/Snapshot, Windows ODX
DS423
DS620slim
Synology MailPlus / MailPlus Server
DS423
DS620slim
Free Email Accounts
DS423
DS620slim 5 (Additional accounts require purchase of licenses)
Maximum Number of Users
DS423
DS620slim 10
Notes
DS423
DS620slim
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DS423
DS620slim
DLNA Compliance
DS423
DS620slim
Synology Photos
DS423
DS620slim
Facial Recognition
DS423
DS620slim
Object Recognition
DS423
DS620slim
Notes
DS423
DS620slim Object recognition requires an upgrade of memory capacity to a minimum of 4 GB.
Snapshot Replication
DS423
DS620slim
Maximum Snapshots per Shared Folder
DS423 128
DS620slim 128
Maximum Snapshots per LUN
DS423 32
DS620slim 32
Maximum Snapshots per System
DS423 1,024
DS620slim 1,024
Maximum Replication Tasks for Shared Folders
DS423 16
DS620slim 16
Maximum Replication Tasks for LUNs
DS423 8
DS620slim 8
Maximum Replication Tasks per System
DS423 16
DS620slim 16
Surveillance Station
DS423
DS620slim
Default Licenses
DS423 2 (Additional cameras require purchase of licenses)
DS620slim 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
DS423
  • 1080p: 30 channels, 600 FPS
  • 3M: 30 channels, 300 FPS
  • 5M: 20 channels, 200 FPS
  • 4K: 15 channels, 150 FPS
DS620slim
  • 1080p: 25 channels, 600 FPS
  • 3M: 25 channels, 350 FPS
  • 5M: 20 channels, 250 FPS
  • 4K: 12 channels, 120 FPS
Maximum IP Cameras and Total FPS (H.265)
DS423
  • 1080p: 30 channels, 800 FPS
  • 3M: 30 channels, 500 FPS
  • 5M: 30 channels, 450 FPS
  • 4K: 20 channels, 200 FPS
DS620slim
  • 1080p: 25 channels, 750 FPS
  • 3M: 25 channels, 450 FPS
  • 5M: 25 channels, 250 FPS
  • 4K: 20 channels, 200 FPS
Notes
DS423
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and 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.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
DS620slim
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and 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.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Synology Drive
DS423
DS620slim
Maximum Number of Users
DS423 5
DS620slim 5
Maximum Number of Hosted Files
DS423 100,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
DS620slim 100,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
DS423
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
DS620slim
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
DS423
DS620slim
Maximum Number of Users
DS423 5
DS620slim 5
Notes
DS423
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
DS620slim
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
DS423
DS620slim
Recommended Virtual Machine Instances
DS423
DS620slim 2 (Learn more)
Recommended Virtual DSM Number (Licenses required)
DS423
DS620slim 2 (including 1 Free License)
Notes
DS423
DS620slim The specifications vary depending on system configuration and memory size.
VPN Server
DS423
DS620slim
Maximum Connections
DS423 2
DS620slim 4