CPU > CPU Model Intel Xeon Silver 4210R
CPU Quantity 2
CPU Cores 10
CPU Threads 20
CPU Architecture 64-bit
CPU Frequency 2.4 (base) / 3.2 (turbo) GHz
Memory > System Memory 64 GB DDR4 ECC RDIMM
Memory Module Pre-installed 64 GB (32 GB × 2)
Total Memory Slots 16
Maximum Memory Capacity 512 GB (32 GB × 16)
Notes Synology may revise pre-installed memory module specifications in response to component lifecycle and supply conditions. All revised components undergo the same rigorous validation to ensure equivalent compatibility, stability, and 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 (See all supported drives) .bx{display:inline-block;vertical-align:middle;}.it{display:flex;}.it::before{content:'• ';white-space:pre;}.it:only-child::before{display:none;}60 × 3.5" SAS HDD or 2.5" SATA SSD
Maximum Drive Bays with Expansion Unit 300 (RX6025sas × 4)
System Drive 2 × 2.5" SATA SSD
Notes #2 To install 2.5" SATA SSDs, optional 2.5" drive trays (R5) must be purchased separately. Learn moreSynology 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.Two Synology SATA SSDs are included in the accessory pack for use as system drives.
External Ports > RJ-45 1GbE LAN Port 2
RJ-45 10GbE LAN Port 2
Out-of-Band Management LAN Port 1
Max. Number of LAN Ports 15
USB 3.2 Gen 1 Port 2
Expansion Port 2
Expansion Port Type Mini-SAS HD
Notes #3 Besides the 5 built-in LAN ports, up to 10 additional LAN ports can be made available by installing compatible network interface cards (sold separately).
PCIe > PCIe Expansion 2 × Gen3 x16 slot (x16 link)2 × Gen3 x8 slots (x8 link)
Appearance > Form Factor (RU) 4U
Size (Height × Width × Depth) 176 mm × 482 mm × 1020 mm
Weight 37.9 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-03)
Others > System Fan 80 mm × 80 mm × 4 pcs
Fan Speed Mode Full-Speed ModeCool ModeQuiet Mode
Noise Level 60.8 dB(A)
Power Supply Unit / Adapter 1600 watts
AC Input Power Voltage 200V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 1025.2 watts (Access)418 watts (HDD Hibernation)
British Thermal Unit 3495.93 BTU/hr (Access)1425.38 BTU/hr (HDD Hibernation)
Notes #4 Noise Level Testing Environment: Fully loaded with Synology HAS5300-8T 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 Synology 8TB HAS5300-8T hard drive(s).
Temperature > Operating Temperature 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH
Storage Humidity 5% to 95% RH
Certification FCCCEBSMIVCCIRCMUKCAEACKCBISUL
Warranty 5 Years
Notes #5 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant
Packaging Content Rail Kit Sliding: RKS-03 × 1Synology SATA SSD X 2Main Unit × 1Accessory Pack × 1AC Power Cord × 2Quick Installation Guide × 1
Optional Accessories DDR4 ECC RDIMM: D4ER02-32GExpansion Units: RX6025sasEnterprise Series 3.5" SAS HDD: HAS5300 SeriesEnterprise Series 2.5" SATA SSD: SAT5200 Series25GbE Network Interface Card: E25G30-F210GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G30-T12.5" Drive Tray (R5)
Notes #6 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 Management > Maximum Single Volume Size 1 PB (for RAID 6 groups only)200 TB
Maximum Internal Volume Number 256
Supported RAID Type BasicJBODRAID 0RAID 1RAID 5RAID 6RAID 10
RAID Migration Basic to RAID 1Basic to RAID 5RAID 1 to RAID 5RAID 5 to RAID 6
Volume Expansion with Larger HDDs RAID 1RAID 5RAID 6RAID 10
Volume Expansion by Adding a HDD JBODRAID 5RAID 6
Global Hot Spare Supported RAID Type RAID 1RAID 5RAID 6RAID 10
Notes #7 Certain conditions are required to support a 1 PB volume. Please refer to this article for more information.Actual maximum storage pool and volume sizes depend on drive sizes 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.Storage efficiency helps reduce storage space consumption through deduplication and compression. For more information about this feature and its support requirements, please refer to this article.SSD cache support requires DSM 7.1.1-42962 Update 4 or later versions.
File System > Internal Drives Btrfs
External Drives Btrfsext4ext3FAT32NTFSHFS+exFAT
File Services > File Protocol SMBAFPNFSFTPWebDAVRsync
Maximum Number of SMB Connections (FSCT-Based) 8,000
Notes #8 Connection value of this model is tested with Synology SATA HDD fully populated and up to four 10GbE network portsModels with expandable memory are tested with the maximum supported quantity installed.SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration: Test workload: HomeFolder scenario provided by the FSCT tool Test duration: 600 seconds Domain controller & FSCT controller: Windows Server 2022 FSCT clients: 8 × Windows 10 machines SMB feature: Directory leasing enabled
Account & Shared Folder > Maximum Local User Accounts 15,360
Maximum Local Groups 512
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 32
Hybrid Share > Maximum Hybrid Share Folders 30
Hyper Backup Folder and Package Backup
Notes #9 Full-system backup requires DSM 7.2 or later.
High Availability Synology High Availability
Log Center > Syslog Events per Second 6,000
Virtualization > VMware vSphere ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0
Microsoft Hyper-V Windows Server 2025, Windows Server 2022, Windows Server 2019, Windows Server 2016
Citrix XenServer XenServer 8.4, XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack Cinder
General Specifications > Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers ChromeFirefoxEdgeSafari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes #10 For an updated list of supported browser versions, check the DSM Technical Specifications.
Synology AI Console Third-Party AI Model Integration
Maximum De-Identification Rate 10,000 words per second
Notes #11 De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
Synology Chat > Maximum Number of Users 500
Notes #12 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.
SAN Manager > Maximum iSCSI Target Number 256
Maximum LUN 512
Synology MailPlus / MailPlus Server > Free Email Accounts 5 (Additional accounts require purchase of licenses)
Maximum Number of Users 21,000
Notes #13 The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn moreModels 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).
Snapshot Replication > Maximum Snapshots per Shared Folder 1,024
Maximum Snapshots per LUN 256
Maximum Snapshots per System 65,536
Maximum Replication Tasks for Shared Folders 128
Maximum Replication Tasks for LUNs 64
Maximum Replication Tasks per System 128
Surveillance Station > Default Licenses 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264) 1080p: 500 channels, 5000 FPS3M: 450 channels, 4500 FPS5M: 300 channels, 3000 FPS4K: 220 channels, 2200 FPS
Maximum IP Cameras and Total FPS (H.265) 1080p: 600 channels, 16200 FPS3M: 500 channels, 5000 FPS5M: 450 channels, 4500 FPS4K: 300 channels, 3000 FPS
Notes #14 Use NVR Selector to quickly find a suitable model based on your requirements.The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.The values above are based on testing with RTSP streaming. If SRTP is enabled for all cameras, overall performance will decrease to 70% of the stated figures.Performance figures are obtained from testing conducted with the device fully populated with drives (5 volumes with 12 drives each volume) under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.Tested using RAID 6 configuration with the maximum number of supported SAS drives.Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed.
Synology Drive > Maximum Number of Users 18,000
Maximum Number of Hosted Files 100,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes #15 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 moreModels with expandable memory are tested with the maximum supported quantity installed.Exceeding the recommended numbers above will not block application operations, but may result in longer response time.Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office > Maximum Number of Users 17,500
Notes #16 The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn moreModels 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 40 (Learn more)
Recommended Virtual DSM Number (Licenses required) 40 (including 1 Free License)
Notes #17 The specifications vary depending on system configuration and memory size.
VPN Server > Maximum Connections 32
