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Bee Series by Synology
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Comparison results

RS1619xs+ RS3618xs RS3621RPxs
RS1619xs+ RS3618xs RS3621RPxs
Hardware Specs
Hardware Specifications
CPU
CPU Model Intel Xeon D-1527 Intel Xeon D-1521 Intel Xeon D-1531
CPU Quantity 1 1 1
CPU Core 4 4 6
CPU Architecture 64-bit 64-bit 64-bit
CPU Frequency 2.2 (base) / 2.7 (turbo) GHz 2.4 (base) / 2.7 (turbo) GHz 2.2 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 8 GB DDR4 ECC UDIMM 8 GB DDR4 ECC UDIMM 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed 8 GB (8 GB x 1) 8 GB (8 GB x 1) 8 GB (8 GB x 1)
Total Memory Slots 4 4 4
Maximum Memory Capacity 64 GB (16 GB x 4) 64 GB (16 GB x 4) 64 GB (16 GB x 4)
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 on the recommended memory configurations, visit here.
  • 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 on the recommended memory configurations, visit here.
  • 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 multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage
Drive Bays 4 12 12
Maximum Drive Bays with Expansion Unit 16 (RX1217 x 1) 36 (RX1217 x 2) 36 (RX1217 x 2)
M.2 Drive Slots 2 (NVMe & SATA)
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe & SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
Notes The hot swappable drive feature is not supported by M.2 SSD slots. Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports
RJ-45 1GbE LAN Port 4 4 4
USB 3.2 Gen 1 Port 2 2 2
Expansion Port 1 2 2
Expansion Port Type Infiniband Infiniband Infiniband
PCIe
PCIe Expansion 1 x Gen3 x8 slot (x8 link) 2 x Gen3 x8 slots (x8 link) 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU) 1U 2U 2U
Size (Height x Width x Depth) 44 mm x 480 mm x 518.6 mm 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm
Weight 8.16 kg 14.5 kg 14.5 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02) 4-post 19" rack (Synology Rail Kit - RKS-02) 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately The rail kit is sold separately The rail kit is sold separately
Others
System Fan 40 mm x 40 mm x 2 pcs 80 mm x 80 mm x 4 pcs 80 mm x 80 mm x 4 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 39.3 dB(A) 50.2 dB(A) 50.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 150 watts 500 watts 500 watts
550 watts*
Redundant Power Supply
AC Input Power Voltage 100V to 240V AC 100V to 240V AC 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption* 68.68 watts (Access)
34.78 watts (HDD Hibernation)		 142.76 watts (Access)
55.05 watts (HDD Hibernation)		 140.01 watts (Access)
65.94 watts (HDD Hibernation)
British Thermal Unit 234.35 BTU/hr (Access)
118.67 BTU/hr (HDD Hibernation)		 487.12 BTU/hr (Access)
187.84 BTU/hr (HDD Hibernation)		 477.43 BTU/hr (Access)
224.86 BTU/hr (HDD Hibernation)
Notes
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • 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 WD10EFRX hard drive(s).
  • 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%
  • For more information on how power consumption is measured, refer to this article.
  • Power supply specifications vary by hardware revision. A 500 W PSU is used in devices with serial numbers containing SYR (5th to 7th digits), while a 550 W PSU is in devices with UTR and VR2 serial numbers. For more information, refer to the Product Change Notice.
  • 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%
Temperature
Operating Temperature 5°C to 35°C (40°F to 95°F) 5°C to 35°C (40°F to 95°F) 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty 5 Years 5 Years 5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant RoHS Compliant RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
Notes
  • Certain items may not be available in your location. Please contact your local distributors for more information.
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
 All memory modules will operate at the maximum frequency specified by the CPU manufacturer. All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number 256 128 128
SSD Read/Write Cache (Determining cache size)
SSD TRIM
RAID Group
Supported RAID Type
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • 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
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6 (with Expansion Unit)
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6 (with Expansion Unit)
  • RAID 10 (with Expansion Unit)
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
File System
Internal Drives
  • Btrfs
  • ext4
  • Btrfs
  • ext4
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
  • 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
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based) 400 500 1,000
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
Account & Shared Folder
Maximum Local User Accounts 2,048 2,048 5,120
Maximum Local Groups 512 512 512
Maximum Shared Folder 512 512 512
Maximum Shared Folder Sync Tasks 12 12 16
Hybrid Share
Hybrid Share Folder Number 15 15 15
Hyper Backup
Folder and Package Backup
Entire System Backup
Notes Full-system backup requires DSM 7.2 or later. Full-system backup requires DSM 7.2 or later. Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 3,000 3,000 3,000
Virtualization
VMware ESXi 6.5 and VAAI
Windows Server 2012
Windows Server 2012 R2
Windows Server 2016
Windows Server 2019
Windows Server 2022
Citrix Ready
OpenStack
General Specifications
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Safari
  • 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 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. 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 Chat
Suggested Users 400 500 500
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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
Maximum Concurrent Download Tasks 80 80 80
SAN Manager
Maximum iSCSI Target Number 64 64 128
Maximum LUN 128 128 256
LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Additional accounts require purchase of licenses) 5 (Additional accounts require purchase of licenses) 5 (Additional accounts require purchase of licenses)
Suggested Users 800 1,100 2,200
Notes
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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).
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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).
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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
Snapshot Replication
Maximum Snapshots per Shared Folder 256 256 512
Maximum of System Snapshots 4,096 4,096 16,384
Surveillance Station
Default Licenses 2 (Additional cameras require purchase of licenses) 2 (Additional cameras require purchase of licenses) 2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)
  • 1080p: 75 channels, 1050 FPS
  • 3M: 60 channels, 600 FPS
  • 5M: 40 channels, 400 FPS
  • 4K: 28 channels, 280 FPS
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 1125 FPS
  • 5M: 70 channels, 700 FPS
  • 4K: 49 channels, 490 FPS
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
  • 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
  • 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
Synology Drive
Suggested Users 700 900 1,900
Maximum 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) 15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • 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.
  • 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.
  • 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
Suggested Users 700 900 1,900
Notes
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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 8 (Learn more) 8 (Learn more) 12 (Learn more)
Recommended Virtual DSM Number (Licenses required) 8 (including 1 Free License) 8 (including 1 Free License) 12 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 12 12 16
Hardware Specs
Hardware Specifications
CPU
CPU Model
RS1619xs+ Intel Xeon D-1527
RS3618xs Intel Xeon D-1521
RS3621RPxs Intel Xeon D-1531
CPU Quantity
RS1619xs+ 1
RS3618xs 1
RS3621RPxs 1
CPU Core
RS1619xs+ 4
RS3618xs 4
RS3621RPxs 6
CPU Architecture
RS1619xs+ 64-bit
RS3618xs 64-bit
RS3621RPxs 64-bit
CPU Frequency
RS1619xs+ 2.2 (base) / 2.7 (turbo) GHz
RS3618xs 2.4 (base) / 2.7 (turbo) GHz
RS3621RPxs 2.2 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
RS1619xs+
RS3618xs
RS3621RPxs
Memory
System Memory
RS1619xs+ 8 GB DDR4 ECC UDIMM
RS3618xs 8 GB DDR4 ECC UDIMM
RS3621RPxs 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed
RS1619xs+ 8 GB (8 GB x 1)
RS3618xs 8 GB (8 GB x 1)
RS3621RPxs 8 GB (8 GB x 1)
Total Memory Slots
RS1619xs+ 4
RS3618xs 4
RS3621RPxs 4
Maximum Memory Capacity
RS1619xs+ 64 GB (16 GB x 4)
RS3618xs 64 GB (16 GB x 4)
RS3621RPxs 64 GB (16 GB x 4)
Notes
RS1619xs+
  • 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 on the recommended memory configurations, visit here.
RS3618xs
  • 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 on the recommended memory configurations, visit here.
RS3621RPxs
  • 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 multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage
Drive Bays
RS1619xs+ 4
RS3618xs 12
RS3621RPxs 12
Maximum Drive Bays with Expansion Unit
RS1619xs+ 16 (RX1217 x 1)
RS3618xs 36 (RX1217 x 2)
RS3621RPxs 36 (RX1217 x 2)
M.2 Drive Slots
RS1619xs+ 2 (NVMe & SATA)
RS3618xs
RS3621RPxs
Drive Type (See all supported drives)
RS1619xs+
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe & SATA SSD
RS3618xs
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
RS3621RPxs
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
RS1619xs+
RS3618xs
RS3621RPxs
Notes
RS1619xs+ The hot swappable drive feature is not supported by M.2 SSD slots.
RS3618xs
RS3621RPxs Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports
RJ-45 1GbE LAN Port
RS1619xs+ 4
RS3618xs 4
RS3621RPxs 4
USB 3.2 Gen 1 Port
RS1619xs+ 2
RS3618xs 2
RS3621RPxs 2
Expansion Port
RS1619xs+ 1
RS3618xs 2
RS3621RPxs 2
Expansion Port Type
RS1619xs+ Infiniband
RS3618xs Infiniband
RS3621RPxs Infiniband
PCIe
PCIe Expansion
RS1619xs+ 1 x Gen3 x8 slot (x8 link)
RS3618xs 2 x Gen3 x8 slots (x8 link)
RS3621RPxs 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU)
RS1619xs+ 1U
RS3618xs 2U
RS3621RPxs 2U
Size (Height x Width x Depth)
RS1619xs+ 44 mm x 480 mm x 518.6 mm
RS3618xs 88 mm x 482 mm x 724 mm
RS3621RPxs 88 mm x 482 mm x 724 mm
Weight
RS1619xs+ 8.16 kg
RS3618xs 14.5 kg
RS3621RPxs 14.5 kg
Rack Installation Support*
RS1619xs+ 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
RS3618xs 4-post 19" rack (Synology Rail Kit - RKS-02)
RS3621RPxs 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes
RS1619xs+ The rail kit is sold separately
RS3618xs The rail kit is sold separately
RS3621RPxs The rail kit is sold separately
Others
System Fan
RS1619xs+ 40 mm x 40 mm x 2 pcs
RS3618xs 80 mm x 80 mm x 4 pcs
RS3621RPxs 80 mm x 80 mm x 4 pcs
Fan Speed Mode
RS1619xs+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
RS3618xs
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
RS3621RPxs
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
RS1619xs+
RS3618xs
RS3621RPxs
Power Recovery
RS1619xs+
RS3618xs
RS3621RPxs
Noise Level*
RS1619xs+ 39.3 dB(A)
RS3618xs 50.2 dB(A)
RS3621RPxs 50.2 dB(A)
Scheduled Power On / Off
RS1619xs+
RS3618xs
RS3621RPxs
Wake on LAN / WAN
RS1619xs+
RS3618xs
RS3621RPxs
Power Supply Unit / Adapter
RS1619xs+ 150 watts
RS3618xs 500 watts
RS3621RPxs 500 watts
550 watts*
Redundant Power Supply
RS1619xs+
RS3618xs
RS3621RPxs
AC Input Power Voltage
RS1619xs+ 100V to 240V AC
RS3618xs 100V to 240V AC
RS3621RPxs 100 V to 240 V AC
Power Frequency
RS1619xs+ 50/60 Hz, Single Phase
RS3618xs 50/60 Hz, Single Phase
RS3621RPxs 50/60 Hz, Single Phase
Power Consumption*
RS1619xs+ 68.68 watts (Access)
34.78 watts (HDD Hibernation)
RS3618xs 142.76 watts (Access)
55.05 watts (HDD Hibernation)
RS3621RPxs 140.01 watts (Access)
65.94 watts (HDD Hibernation)
British Thermal Unit
RS1619xs+ 234.35 BTU/hr (Access)
118.67 BTU/hr (HDD Hibernation)
RS3618xs 487.12 BTU/hr (Access)
187.84 BTU/hr (HDD Hibernation)
RS3621RPxs 477.43 BTU/hr (Access)
224.86 BTU/hr (HDD Hibernation)
Notes
RS1619xs+
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • 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%
RS3618xs
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • 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%
RS3621RPxs
  • For more information on how power consumption is measured, refer to this article.
  • Power supply specifications vary by hardware revision. A 500 W PSU is used in devices with serial numbers containing SYR (5th to 7th digits), while a 550 W PSU is in devices with UTR and VR2 serial numbers. For more information, refer to the Product Change Notice.
  • 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%
Temperature
Operating Temperature
RS1619xs+ 5°C to 35°C (40°F to 95°F)
RS3618xs 5°C to 35°C (40°F to 95°F)
RS3621RPxs 0°C to 35°C (32°F to 95°F)
Storage Temperature
RS1619xs+ -20°C to 60°C (-5°F to 140°F)
RS3618xs -20°C to 60°C (-5°F to 140°F)
RS3621RPxs -20°C to 60°C (-5°F to 140°F)
Relative Humidity
RS1619xs+ 5% to 95% RH
RS3618xs 5% to 95% RH
RS3621RPxs 5% to 95% RH
Certification
RS1619xs+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
RS3618xs
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
RS3621RPxs
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty
RS1619xs+ 5 Years
RS3618xs 5 Years
RS3621RPxs 5 Years
Notes
RS1619xs+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RS3618xs The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RS3621RPxs The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
RS1619xs+ RoHS Compliant
RS3618xs RoHS Compliant
RS3621RPxs RoHS Compliant
Packaging Content
RS1619xs+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
RS3618xs
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Quick Installation Guide X 1
RS3621RPxs
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
RS1619xs+
RS3618xs
RS3621RPxs
Notes
RS1619xs+
  • Certain items may not be available in your location. Please contact your local distributors for more information.
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
RS3618xs All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
RS3621RPxs All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
RS1619xs+
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
RS3618xs
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
RS3621RPxs
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number
RS1619xs+ 256
RS3618xs 128
RS3621RPxs 128
SSD Read/Write Cache (Determining cache size)
RS1619xs+
RS3618xs
RS3621RPxs
SSD TRIM
RS1619xs+
RS3618xs
RS3621RPxs
RAID Group
RS1619xs+
RS3618xs
RS3621RPxs
Supported RAID Type
RS1619xs+
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3618xs
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621RPxs
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
RS1619xs+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
RS3618xs
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
RS3621RPxs
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
RS1619xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3618xs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621RPxs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
RS1619xs+
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6 (with Expansion Unit)
RS3618xs
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
RS3621RPxs
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
RS1619xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6 (with Expansion Unit)
  • RAID 10 (with Expansion Unit)
RS3618xs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621RPxs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
RS1619xs+
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
RS3618xs
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
RS3621RPxs
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
File System
Internal Drives
RS1619xs+
  • Btrfs
  • ext4
RS3618xs
  • Btrfs
  • ext4
RS3621RPxs
  • Btrfs
  • ext4
External Drives
RS1619xs+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
RS3618xs
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
RS3621RPxs
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
RS1619xs+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
RS3618xs
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
RS3621RPxs
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
RS1619xs+ 400
RS3618xs 500
RS3621RPxs 1,000
Windows Access Control List (ACL) Integration
RS1619xs+
RS3618xs
RS3621RPxs
NFS Kerberos Authentication
RS1619xs+
RS3618xs
RS3621RPxs
Notes
RS1619xs+
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
RS3618xs
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
RS3621RPxs
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
Account & Shared Folder
Maximum Local User Accounts
RS1619xs+ 2,048
RS3618xs 2,048
RS3621RPxs 5,120
Maximum Local Groups
RS1619xs+ 512
RS3618xs 512
RS3621RPxs 512
Maximum Shared Folder
RS1619xs+ 512
RS3618xs 512
RS3621RPxs 512
Maximum Shared Folder Sync Tasks
RS1619xs+ 12
RS3618xs 12
RS3621RPxs 16
Hybrid Share
Hybrid Share Folder Number
RS1619xs+ 15
RS3618xs 15
RS3621RPxs 15
Hyper Backup
Folder and Package Backup
RS1619xs+
RS3618xs
RS3621RPxs
Entire System Backup
RS1619xs+
RS3618xs
RS3621RPxs
Notes
RS1619xs+ Full-system backup requires DSM 7.2 or later.
RS3618xs Full-system backup requires DSM 7.2 or later.
RS3621RPxs Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
RS1619xs+
RS3618xs
RS3621RPxs
Log Center
RS1619xs+
RS3618xs
RS3621RPxs
Syslog Events per Second
RS1619xs+ 3,000
RS3618xs 3,000
RS3621RPxs 3,000
Virtualization
VMware ESXi 6.5 and VAAI
RS1619xs+
RS3618xs
RS3621RPxs
Windows Server 2012
RS1619xs+
RS3618xs
RS3621RPxs
Windows Server 2012 R2
RS1619xs+
RS3618xs
RS3621RPxs
Windows Server 2016
RS1619xs+
RS3618xs
RS3621RPxs
Windows Server 2019
RS1619xs+
RS3618xs
RS3621RPxs
Windows Server 2022
RS1619xs+
RS3618xs
RS3621RPxs
Citrix Ready
RS1619xs+
RS3618xs
RS3621RPxs
OpenStack
RS1619xs+
RS3618xs
RS3621RPxs
General Specifications
Supported Protocols
RS1619xs+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
RS3618xs SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
RS3621RPxs SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
RS1619xs+
  • Chrome
  • Firefox
  • Edge
  • Safari
RS3618xs
  • Chrome
  • Firefox
  • Edge
  • Safari
RS3621RPxs
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
RS1619xs+ 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
RS3618xs 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
RS3621RPxs 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
RS1619xs+ For an updated list of supported browser versions, check the DSM Technical Specifications.
RS3618xs For an updated list of supported browser versions, check the DSM Technical Specifications.
RS3621RPxs For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
RS1619xs+
RS3618xs
RS3621RPxs
Synology Chat
RS1619xs+
RS3618xs
RS3621RPxs
Suggested Users
RS1619xs+ 400
RS3618xs 500
RS3621RPxs 500
Notes
RS1619xs+
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
RS3618xs
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
RS3621RPxs
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
RS1619xs+
RS3618xs
RS3621RPxs
Maximum Concurrent Download Tasks
RS1619xs+ 80
RS3618xs 80
RS3621RPxs 80
SAN Manager
RS1619xs+
RS3618xs
RS3621RPxs
Maximum iSCSI Target Number
RS1619xs+ 64
RS3618xs 64
RS3621RPxs 128
Maximum LUN
RS1619xs+ 128
RS3618xs 128
RS3621RPxs 256
LUN Clone/Snapshot, Windows ODX
RS1619xs+
RS3618xs
RS3621RPxs
Synology MailPlus / MailPlus Server
RS1619xs+
RS3618xs
RS3621RPxs
Free Email Accounts
RS1619xs+ 5 (Additional accounts require purchase of licenses)
RS3618xs 5 (Additional accounts require purchase of licenses)
RS3621RPxs 5 (Additional accounts require purchase of licenses)
Suggested Users
RS1619xs+ 800
RS3618xs 1,100
RS3621RPxs 2,200
Notes
RS1619xs+
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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).
RS3618xs
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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).
RS3621RPxs
  • Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 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
RS1619xs+
RS3618xs
RS3621RPxs
DLNA Compliance
RS1619xs+
RS3618xs
RS3621RPxs
Synology Photos
RS1619xs+
RS3618xs
RS3621RPxs
Facial Recognition
RS1619xs+
RS3618xs
RS3621RPxs
Object Recognition
RS1619xs+
RS3618xs
RS3621RPxs
Snapshot Replication
RS1619xs+
RS3618xs
RS3621RPxs
Maximum Snapshots per Shared Folder
RS1619xs+ 256
RS3618xs 256
RS3621RPxs 512
Maximum of System Snapshots
RS1619xs+ 4,096
RS3618xs 4,096
RS3621RPxs 16,384
Surveillance Station
RS1619xs+
RS3618xs
RS3621RPxs
Default Licenses
RS1619xs+ 2 (Additional cameras require purchase of licenses)
RS3618xs 2 (Additional cameras require purchase of licenses)
RS3621RPxs 2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)
RS1619xs+
  • 1080p: 75 channels, 1050 FPS
  • 3M: 60 channels, 600 FPS
  • 5M: 40 channels, 400 FPS
  • 4K: 28 channels, 280 FPS
RS3618xs
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
RS3621RPxs
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)
RS1619xs+
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 1125 FPS
  • 5M: 70 channels, 700 FPS
  • 4K: 49 channels, 490 FPS
RS3618xs
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
RS3621RPxs
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
Notes
RS1619xs+
  • 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
RS3618xs
  • 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
RS3621RPxs
  • 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 streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
Synology Drive
RS1619xs+
RS3618xs
RS3621RPxs
Suggested Users
RS1619xs+ 700
RS3618xs 900
RS3621RPxs 1,900
Maximum Number of Hosted Files
RS1619xs+ 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)
RS3618xs 15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
RS3621RPxs 15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
RS1619xs+
  • 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.
RS3618xs
  • 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.
RS3621RPxs
  • 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
RS1619xs+
RS3618xs
RS3621RPxs
Suggested Users
RS1619xs+ 700
RS3618xs 900
RS3621RPxs 1,900
Notes
RS1619xs+
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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
RS3618xs
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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
RS3621RPxs
  • Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. 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
RS1619xs+
RS3618xs
RS3621RPxs
Recommended Virtual Machine Instances
RS1619xs+ 8 (Learn more)
RS3618xs 8 (Learn more)
RS3621RPxs 12 (Learn more)
Recommended Virtual DSM Number (Licenses required)
RS1619xs+ 8 (including 1 Free License)
RS3618xs 8 (including 1 Free License)
RS3621RPxs 12 (including 1 Free License)
Notes
RS1619xs+ The specifications vary depending on system configuration and memory size.
RS3618xs The specifications vary depending on system configuration and memory size.
RS3621RPxs The specifications vary depending on system configuration and memory size.
VPN Server
RS1619xs+
RS3618xs
RS3621RPxs
Maximum Connections
RS1619xs+ 12
RS3618xs 12
RS3621RPxs 16