Store

Cart summary ()

Total (undefined items)Exact taxes and shipping will be calculated at checkout.

Continue shopping

Bee Series by Synology
Products A-Z
Store
  1. products list

Comparison results

RS3621RPxs RS3621xs+
RS3621RPxs RS3621xs+
Hardware Specs
Hardware Specifications
CPU
CPU Model Intel Xeon D-1531 Intel Xeon D-1541
CPU Quantity 1 1
CPU Core 6 8
CPU Architecture 64-bit 64-bit
CPU Frequency 2.2 (base) / 2.7 (turbo) GHz 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 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)
Total Memory Slots 4 4
Maximum Memory Capacity 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 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.
  • 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 12 12
Maximum Drive Bays with Expansion Unit 36 (RX1217 x 2) 36 (RX1217 x 2)
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
Notes 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. 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
RJ-45 10GbE LAN Port 2
USB 3.2 Gen 1 Port 2 2
Expansion Port 2 2
Expansion Port Type Infiniband Infiniband
PCIe
PCIe Expansion 2 x Gen3 x8 slots (x8 link) 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU) 2U 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm
Weight 14.5 kg 14.5 kg
Rack Installation Support* 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
Others
System Fan 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
Easy Replacement System Fan
Power Recovery
Noise Level* 50.2 dB(A) 50.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 500 watts
550 watts*		 500 watts
550 watts*
Redundant Power Supply
AC Input Power Voltage 100 V to 240 V AC 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption* 140.01 watts (Access)
65.94 watts (HDD Hibernation)		 142.5 watts (Access)
72.76 watts (HDD Hibernation)
British Thermal Unit 477.43 BTU/hr (Access)
224.86 BTU/hr (HDD Hibernation)		 485.93 BTU/hr (Access)
248.11 BTU/hr (HDD Hibernation)
Notes
  • 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%
  • 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 SZR (5th to 7th digits), while a 550 W PSU is in devices with UUR and VR1 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 0°C to 35°C (32°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)
Relative Humidity 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty 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)
Environment 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 2
  • Quick Installation Guide X 1
Optional Accessories
Notes 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
Maximum Internal Volume Number 128 256
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 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
  • 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
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • 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.
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) 1,000 1,300
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).
Account & Shared Folder
Maximum Local User Accounts 5,120 5,120
Maximum Local Groups 512 512
Maximum Shared Folder 512 512
Maximum Shared Folder Sync Tasks 16 32
Hybrid Share
Hybrid Share Folder Number 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.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 3,000 3,000
Virtualization
VMware ESXi 6.5 and VAAI
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
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 Chat
Suggested Users 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.
Download Station
Maximum Concurrent Download Tasks 80 80
SAN Manager
Maximum iSCSI Target Number 128 128
Maximum LUN 256 256
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)
Suggested Users 2,200 2,800
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).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Object Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder 512 512
Maximum of System Snapshots 16,384 16,384
Surveillance Station
Default 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, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
  • 1080p: 90 channels, 2250 FPS
  • 3M: 90 channels, 1500 FPS
  • 5M: 90 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, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
  • 1080p: 90 channels, 2700 FPS
  • 3M: 90 channels, 2250 FPS
  • 5M: 90 channels, 1500 FPS
  • 4K: 90 channels, 1080 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.
Synology Drive
Suggested Users 1,900 2,400
Maximum Number of Hosted Files 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.
Synology Office
Suggested Users 1,900 2,300
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
Virtual Machine Manager
Recommended Virtual Machine Instances 12 (Learn more) 16 (Learn more)
Recommended Virtual DSM Number (Licenses required) 12 (including 1 Free License) 16 (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.
VPN Server
Maximum Connections 16 32
Hardware Specs
Hardware Specifications
CPU
CPU Model
RS3621RPxs Intel Xeon D-1531
RS3621xs+ Intel Xeon D-1541
CPU Quantity
RS3621RPxs 1
RS3621xs+ 1
CPU Core
RS3621RPxs 6
RS3621xs+ 8
CPU Architecture
RS3621RPxs 64-bit
RS3621xs+ 64-bit
CPU Frequency
RS3621RPxs 2.2 (base) / 2.7 (turbo) GHz
RS3621xs+ 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
RS3621RPxs
RS3621xs+
Memory
System Memory
RS3621RPxs 8 GB DDR4 ECC UDIMM
RS3621xs+ 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed
RS3621RPxs 8 GB (8 GB x 1)
RS3621xs+ 8 GB (8 GB x 1)
Total Memory Slots
RS3621RPxs 4
RS3621xs+ 4
Maximum Memory Capacity
RS3621RPxs 64 GB (16 GB x 4)
RS3621xs+ 64 GB (16 GB x 4)
Notes
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.
RS3621xs+
  • 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
RS3621RPxs 12
RS3621xs+ 12
Maximum Drive Bays with Expansion Unit
RS3621RPxs 36 (RX1217 x 2)
RS3621xs+ 36 (RX1217 x 2)
Drive Type (See all supported drives)
RS3621RPxs
  • 3.5" SATA HDD
  • 2.5" SATA SSD
RS3621xs+
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
RS3621RPxs
RS3621xs+
Notes
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.
RS3621xs+ 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
RS3621RPxs 4
RS3621xs+ 4
RJ-45 10GbE LAN Port
RS3621RPxs
RS3621xs+ 2
USB 3.2 Gen 1 Port
RS3621RPxs 2
RS3621xs+ 2
Expansion Port
RS3621RPxs 2
RS3621xs+ 2
Expansion Port Type
RS3621RPxs Infiniband
RS3621xs+ Infiniband
PCIe
PCIe Expansion
RS3621RPxs 2 x Gen3 x8 slots (x8 link)
RS3621xs+ 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU)
RS3621RPxs 2U
RS3621xs+ 2U
Size (Height x Width x Depth)
RS3621RPxs 88 mm x 482 mm x 724 mm
RS3621xs+ 88 mm x 482 mm x 724 mm
Weight
RS3621RPxs 14.5 kg
RS3621xs+ 14.5 kg
Rack Installation Support*
RS3621RPxs 4-post 19" rack (Synology Rail Kit - RKS-02)
RS3621xs+ 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes
RS3621RPxs The rail kit is sold separately
RS3621xs+ The rail kit is sold separately
Others
System Fan
RS3621RPxs 80 mm x 80 mm x 4 pcs
RS3621xs+ 80 mm x 80 mm x 4 pcs
Fan Speed Mode
RS3621RPxs
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
RS3621xs+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
RS3621RPxs
RS3621xs+
Power Recovery
RS3621RPxs
RS3621xs+
Noise Level*
RS3621RPxs 50.2 dB(A)
RS3621xs+ 50.2 dB(A)
Scheduled Power On / Off
RS3621RPxs
RS3621xs+
Wake on LAN / WAN
RS3621RPxs
RS3621xs+
Power Supply Unit / Adapter
RS3621RPxs 500 watts
550 watts*
RS3621xs+ 500 watts
550 watts*
Redundant Power Supply
RS3621RPxs
RS3621xs+
AC Input Power Voltage
RS3621RPxs 100 V to 240 V AC
RS3621xs+ 100 V to 240 V AC
Power Frequency
RS3621RPxs 50/60 Hz, Single Phase
RS3621xs+ 50/60 Hz, Single Phase
Power Consumption*
RS3621RPxs 140.01 watts (Access)
65.94 watts (HDD Hibernation)
RS3621xs+ 142.5 watts (Access)
72.76 watts (HDD Hibernation)
British Thermal Unit
RS3621RPxs 477.43 BTU/hr (Access)
224.86 BTU/hr (HDD Hibernation)
RS3621xs+ 485.93 BTU/hr (Access)
248.11 BTU/hr (HDD Hibernation)
Notes
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%
RS3621xs+
  • 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 SZR (5th to 7th digits), while a 550 W PSU is in devices with UUR and VR1 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
RS3621RPxs 0°C to 35°C (32°F to 95°F)
RS3621xs+ 0°C to 35°C (32°F to 95°F)
Storage Temperature
RS3621RPxs -20°C to 60°C (-5°F to 140°F)
RS3621xs+ -20°C to 60°C (-5°F to 140°F)
Relative Humidity
RS3621RPxs 5% to 95% RH
RS3621xs+ 5% to 95% RH
Certification
RS3621RPxs
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
RS3621xs+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty
RS3621RPxs 5 Years
RS3621xs+ 5 Years
Notes
RS3621RPxs The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RS3621xs+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
RS3621RPxs RoHS Compliant
RS3621xs+ RoHS Compliant
Packaging Content
RS3621RPxs
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
RS3621xs+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
RS3621RPxs
RS3621xs+
Notes
RS3621RPxs All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
RS3621xs+ All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
RS3621RPxs
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
RS3621xs+
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number
RS3621RPxs 128
RS3621xs+ 256
SSD Read/Write Cache (Determining cache size)
RS3621RPxs
RS3621xs+
SSD TRIM
RS3621RPxs
RS3621xs+
RAID Group
RS3621RPxs
RS3621xs+
Supported RAID Type
RS3621RPxs
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621xs+
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
RS3621RPxs
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
RS3621xs+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
RS3621RPxs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
RS3621RPxs
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
RS3621xs+
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
RS3621RPxs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS3621xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
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.
RS3621xs+
  • 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
RS3621RPxs
  • Btrfs
  • ext4
RS3621xs+
  • Btrfs
  • ext4
External Drives
RS3621RPxs
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
RS3621xs+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
RS3621RPxs
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
RS3621xs+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
RS3621RPxs 1,000
RS3621xs+ 1,300
Windows Access Control List (ACL) Integration
RS3621RPxs
RS3621xs+
NFS Kerberos Authentication
RS3621RPxs
RS3621xs+
Notes
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).
RS3621xs+
  • 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
RS3621RPxs 5,120
RS3621xs+ 5,120
Maximum Local Groups
RS3621RPxs 512
RS3621xs+ 512
Maximum Shared Folder
RS3621RPxs 512
RS3621xs+ 512
Maximum Shared Folder Sync Tasks
RS3621RPxs 16
RS3621xs+ 32
Hybrid Share
Hybrid Share Folder Number
RS3621RPxs 15
RS3621xs+ 15
Hyper Backup
Folder and Package Backup
RS3621RPxs
RS3621xs+
Entire System Backup
RS3621RPxs
RS3621xs+
Notes
RS3621RPxs Full-system backup requires DSM 7.2 or later.
RS3621xs+ Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
RS3621RPxs
RS3621xs+
Log Center
RS3621RPxs
RS3621xs+
Syslog Events per Second
RS3621RPxs 3,000
RS3621xs+ 3,000
Virtualization
VMware ESXi 6.5 and VAAI
RS3621RPxs
RS3621xs+
Windows Server 2016
RS3621RPxs
RS3621xs+
Windows Server 2019
RS3621RPxs
RS3621xs+
Windows Server 2022
RS3621RPxs
RS3621xs+
Citrix Ready
RS3621RPxs
RS3621xs+
OpenStack
RS3621RPxs
RS3621xs+
General Specifications
Supported Protocols
RS3621RPxs SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
RS3621xs+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
RS3621RPxs
  • Chrome
  • Firefox
  • Edge
  • Safari
RS3621xs+
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
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
RS3621xs+ 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
RS3621RPxs For an updated list of supported browser versions, check the DSM Technical Specifications.
RS3621xs+ For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
RS3621RPxs
RS3621xs+
Synology Chat
RS3621RPxs
RS3621xs+
Suggested Users
RS3621RPxs 500
RS3621xs+ 500
Notes
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.
RS3621xs+
  • 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
RS3621RPxs
RS3621xs+
Maximum Concurrent Download Tasks
RS3621RPxs 80
RS3621xs+ 80
SAN Manager
RS3621RPxs
RS3621xs+
Maximum iSCSI Target Number
RS3621RPxs 128
RS3621xs+ 128
Maximum LUN
RS3621RPxs 256
RS3621xs+ 256
LUN Clone/Snapshot, Windows ODX
RS3621RPxs
RS3621xs+
Synology MailPlus / MailPlus Server
RS3621RPxs
RS3621xs+
Free Email Accounts
RS3621RPxs 5 (Additional accounts require purchase of licenses)
RS3621xs+ 5 (Additional accounts require purchase of licenses)
Suggested Users
RS3621RPxs 2,200
RS3621xs+ 2,800
Notes
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).
RS3621xs+
  • 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
RS3621RPxs
RS3621xs+
DLNA Compliance
RS3621RPxs
RS3621xs+
Synology Photos
RS3621RPxs
RS3621xs+
Facial Recognition
RS3621RPxs
RS3621xs+
Object Recognition
RS3621RPxs
RS3621xs+
Snapshot Replication
RS3621RPxs
RS3621xs+
Maximum Snapshots per Shared Folder
RS3621RPxs 512
RS3621xs+ 512
Maximum of System Snapshots
RS3621RPxs 16,384
RS3621xs+ 16,384
Surveillance Station
RS3621RPxs
RS3621xs+
Default Licenses
RS3621RPxs 2 (Additional cameras require purchase of licenses)
RS3621xs+ 2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)
RS3621RPxs
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
RS3621xs+
  • 1080p: 90 channels, 2250 FPS
  • 3M: 90 channels, 1500 FPS
  • 5M: 90 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)
RS3621RPxs
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
RS3621xs+
  • 1080p: 90 channels, 2700 FPS
  • 3M: 90 channels, 2250 FPS
  • 5M: 90 channels, 1500 FPS
  • 4K: 90 channels, 1080 FPS
Notes
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.
RS3621xs+
  • 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
RS3621RPxs
RS3621xs+
Suggested Users
RS3621RPxs 1,900
RS3621xs+ 2,400
Maximum Number of Hosted Files
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)
RS3621xs+ 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
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.
RS3621xs+
  • 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
RS3621RPxs
RS3621xs+
Suggested Users
RS3621RPxs 1,900
RS3621xs+ 2,300
Notes
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
RS3621xs+
  • 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
RS3621RPxs
RS3621xs+
Recommended Virtual Machine Instances
RS3621RPxs 12 (Learn more)
RS3621xs+ 16 (Learn more)
Recommended Virtual DSM Number (Licenses required)
RS3621RPxs 12 (including 1 Free License)
RS3621xs+ 16 (including 1 Free License)
Notes
RS3621RPxs The specifications vary depending on system configuration and memory size.
RS3621xs+ The specifications vary depending on system configuration and memory size.
VPN Server
RS3621RPxs
RS3621xs+
Maximum Connections
RS3621RPxs 16
RS3621xs+ 32