Comparison results

Highlight Differences

RS2423+

RS3618xs

Hardware Specifications
CPU
CPU Model	AMD Ryzen V1780B	Intel Xeon D-1521
CPU Quantity	1	1
CPU Core	4	4
CPU Architecture	64-bit	64-bit
CPU Frequency	3.35 (base) / 3.6 (turbo) GHz	2.4 (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	2	4
Maximum Memory Capacity	32 GB (16 GB x 2)	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 more information on the recommended memory configurations, visit here.
Storage
Drive Bays	12	12
Maximum Drive Bays with Expansion Unit	24 (RX1223RP x 1)	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 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.
External Ports
RJ-45 1GbE LAN Port	2	4
RJ-45 10GbE LAN Port	1
USB 3.2 Gen 1 Port	2	2
Expansion Port	1	2
Expansion Port Type	Mini-SAS HD	Infiniband
Notes	MTU value of 1GbE LAN port has a limit of 1500.
PCIe
PCIe Expansion	1 x Gen3 x8 slot (x4 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 552 mm	88 mm x 482 mm x 724 mm
Weight	11.5 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	60 mm x 60 mm x 3 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*	52.3 dB(A)	50.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter	500 watts	500 watts
AC Input Power Voltage	100 V to 240 V AC	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
Power Consumption*	119.95 watts (Access) 46.21 watts (HDD Hibernation)	142.76 watts (Access) 55.05 watts (HDD Hibernation)
British Thermal Unit	409.56 BTU/hr (Access) 157.78 BTU/hr (HDD Hibernation)	487.12 BTU/hr (Access) 187.84 BTU/hr (HDD Hibernation)
Notes	For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two GRAS 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.	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%
Temperature
Operating Temperature	0°C to 35°C (32°F to 95°F)	5°C to 35°C (40°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)
Operating Humidity	8% to 80% RH	8% to 80% RH
Storage Humidity	5% to 95% RH	5% to 95% RH
Certification	FCC CE BSMI VCCI RCM UKCA EAC CCC KC UL	FCC CE BSMI VCCI RCM EAC CCC KC BIS
Warranty	3-year hardware warranty, extendable to 5 years with Extended Warranty Plus	5 Years
Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment	RoHS Compliant	RoHS Compliant
Packaging Content	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 1 Quick Installation Guide X 1
Optional Accessories	DDR4 ECC UDIMM: D4EU01-8G/D4EU01-16G Expansion Units: RX1223RP Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02	DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G Expansion Units: RX1217/RX1217RP Enterprise Series 3.5" SATA HDD: HAT5300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
Notes	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. 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.

DSM Specifications
Storage Management
Maximum Single Volume Size	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	64	128
SSD Read/Write Cache (Determining cache size)
SSD TRIM
RAID Group
Supported RAID Type	Synology Hybrid RAID 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	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
Volume Expansion by Adding a HDD	Synology Hybrid RAID JBOD RAID 5 RAID 6	RAID F1 JBOD RAID 5 RAID 6
Global Hot Spare Supported RAID Type	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
Notes	Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration. Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored. Volumes over 108 TB require DSM 7.2-64570 or above and 32 GB of memory or more.	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)	380	500
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes	Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports Models with expandable memory are tested with the maximum supported quantity installed. SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration: Test workload: HomeFolder scenario provided by the FSCT tool Test duration: 600 seconds Domain controller & FSCT controller: Windows Server 2022 FSCT clients: 8 × Windows 10 machines SMB feature: Directory leasing enabled	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. 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	1,024	2,048
Maximum Local Groups	256	512
Maximum Shared Folder	256	512
Maximum Shared Folder Sync Tasks	12	12
Hybrid Share
Hybrid Share Folder Number	10	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	1,000	3,000
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, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5	ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
Microsoft Hyper-V	Windows Server 2022	Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012
Citrix XenServer	XenServer 8, Citrix Hypervisor 8.2 LTSR CU1	XenServer 7
OpenStack	Cinder	Cinder
General Specifications
Supported Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, 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 AI Console
Third-Party AI Model Integration
Maximum De-Identification Rate	380 words per second	500 words per second
Notes	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.	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
Suggested Users	150	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	64	64
Maximum LUN	128	128
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	790	1,100
Notes	The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more Models with SSD support are tested with a single SSD volume. Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements. Operating in high-availability mode will incur additional overhead. Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).	The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more Models with SSD support are tested with a single SSD volume. Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements. Operating in high-availability mode will incur additional overhead. Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Object Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder	256	256
Maximum of System Snapshots	4,096	4,096
Surveillance Station
Default Licenses	2 (Additional cameras require purchase of licenses)	2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)	1080p: 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
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: 75 channels, 2250 FPS 3M: 75 channels, 2250 FPS 5M: 75 channels, 1500 FPS 4K: 75 channels, 900 FPS
Notes	Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed. Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Synology Drive
Suggested Users	680	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)
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	660	900
Notes	The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more Models with SSD support are tested with a single SSD volume. 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	The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more Models with SSD support are tested with a single SSD volume. Models with expandable memory are tested with the maximum supported quantity installed. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Recommended Virtual Machine Instances	8 (Learn more)	8 (Learn more)
Recommended Virtual DSM Number (Licenses required)	8 (including 1 Free License)	8 (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	12	12

Hardware Specs

Hardware Specifications

CPU

CPU Model

RS2423+	AMD Ryzen V1780B
RS3618xs	Intel Xeon D-1521

CPU Quantity

RS2423+	1
RS3618xs	1

CPU Core

RS2423+	4
RS3618xs	4

CPU Architecture

RS2423+	64-bit
RS3618xs	64-bit

CPU Frequency

RS2423+	3.35 (base) / 3.6 (turbo) GHz
RS3618xs	2.4 (base) / 2.7 (turbo) GHz

Hardware Encryption Engine

Memory

System Memory

RS2423+	8 GB DDR4 ECC UDIMM
RS3618xs	8 GB DDR4 ECC UDIMM

Memory Module Pre-installed

RS2423+	8 GB (8 GB x 1)
RS3618xs	8 GB (8 GB x 1)

Total Memory Slots

RS2423+	2
RS3618xs	4

Maximum Memory Capacity

RS2423+	32 GB (16 GB x 2)
RS3618xs	64 GB (16 GB x 4)

Notes

RS2423+	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.
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.

RS2423+

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.

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.

Storage

Drive Bays

RS2423+	12
RS3618xs	12

Maximum Drive Bays with Expansion Unit

RS2423+	24 (RX1223RP x 1)
RS3618xs	36 (RX1217 x 2)

Drive Type (See all supported drives)

RS2423+	3.5" SATA HDD 2.5" SATA SSD
RS3618xs	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD

Hot Swappable Drive*

Notes

RS2423+	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.
RS3618xs

External Ports

RJ-45 1GbE LAN Port

RS2423+	2
RS3618xs	4

RJ-45 10GbE LAN Port

RS2423+	1
RS3618xs

USB 3.2 Gen 1 Port

RS2423+	2
RS3618xs	2

Expansion Port

RS2423+	1
RS3618xs	2

Expansion Port Type

RS2423+	Mini-SAS HD
RS3618xs	Infiniband

Notes

RS2423+	MTU value of 1GbE LAN port has a limit of 1500.
RS3618xs

PCIe

PCIe Expansion

RS2423+	1 x Gen3 x8 slot (x4 link)
RS3618xs	2 x Gen3 x8 slots (x8 link)

Appearance

Form Factor (RU)

RS2423+	2U
RS3618xs	2U

Size (Height x Width x Depth)

RS2423+	88 mm x 482 mm x 552 mm
RS3618xs	88 mm x 482 mm x 724 mm

Weight

RS2423+	11.5 kg
RS3618xs	14.5 kg

Rack Installation Support*

RS2423+	4-post 19" rack (Synology Rail Kit - RKS-02)
RS3618xs	4-post 19" rack (Synology Rail Kit - RKS-02)

Notes

RS2423+	The rail kit is sold separately
RS3618xs	The rail kit is sold separately

Others

System Fan

RS2423+	60 mm x 60 mm x 3 pcs
RS3618xs	80 mm x 80 mm x 4 pcs

Fan Speed Mode

RS2423+	Full-Speed Mode Cool Mode Quiet Mode
RS3618xs	Full-Speed Mode Cool Mode Quiet Mode

Easy Replacement System Fan

Power Recovery

Noise Level*

RS2423+	52.3 dB(A)
RS3618xs	50.2 dB(A)

Scheduled Power On / Off

Wake on LAN / WAN

Power Supply Unit / Adapter

RS2423+	500 watts
RS3618xs	500 watts

AC Input Power Voltage

RS2423+	100 V to 240 V AC
RS3618xs	100V to 240V AC

Power Frequency

RS2423+	50/60 Hz, Single Phase
RS3618xs	50/60 Hz, Single Phase

Power Consumption*

RS2423+	119.95 watts (Access) 46.21 watts (HDD Hibernation)
RS3618xs	142.76 watts (Access) 55.05 watts (HDD Hibernation)

British Thermal Unit

RS2423+	409.56 BTU/hr (Access) 157.78 BTU/hr (HDD Hibernation)
RS3618xs	487.12 BTU/hr (Access) 187.84 BTU/hr (HDD Hibernation)

Notes

RS2423+	For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two GRAS 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
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%

RS2423+

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

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%

Temperature

Operating Temperature

RS2423+	0°C to 35°C (32°F to 95°F)
RS3618xs	5°C to 35°C (40°F to 95°F)

Storage Temperature

RS2423+	-20°C to 60°C (-5°F to 140°F)
RS3618xs	-20°C to 60°C (-5°F to 140°F)

Operating Humidity

Storage Humidity

Certification

Warranty

RS2423+	3-year hardware warranty, extendable to 5 years with Extended Warranty Plus
RS3618xs	5 Years

Notes

RS2423+	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
RS3618xs	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

Environment

Packaging Content

RS2423+	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 1 Quick Installation Guide X 1
RS3618xs	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 1 Quick Installation Guide X 1

Optional Accessories

RS2423+	DDR4 ECC UDIMM: D4EU01-8G/D4EU01-16G Expansion Units: RX1223RP Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
RS3618xs	DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G Expansion Units: RX1217/RX1217RP Enterprise Series 3.5" SATA HDD: HAT5300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02

Notes

RS2423+	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. Certain items may not be available in your location. Please contact your local distributors for more information.
RS3618xs	All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

Software Specs

DSM Specifications

Storage Management

Maximum Single Volume Size

RS2423+	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

Maximum Internal Volume Number

SSD Read/Write Cache (Determining cache size)

SSD TRIM

RAID Group

Supported RAID Type

RS2423+	Synology Hybrid RAID 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

RAID Migration

RS2423+	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

Volume Expansion with Larger HDDs

RS2423+	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
RS3618xs	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10

Volume Expansion by Adding a HDD

Global Hot Spare Supported RAID Type

RS2423+	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
RS3618xs	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10

Notes

RS2423+

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.
Volumes over 108 TB require DSM 7.2-64570 or above and 32 GB of memory or more.

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.

File System

Internal Drives

External Drives

File Services

File Protocol

Maximum Number of SMB Connections (FSCT-Based)

Windows Access Control List (ACL) Integration

NFS Kerberos Authentication

Notes

RS2423+

Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
Models with expandable memory are tested with the maximum supported quantity installed.
SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
- Test workload: HomeFolder scenario provided by the FSCT tool
- Test duration: 600 seconds
- Domain controller & FSCT controller: Windows Server 2022
- FSCT clients: 8 × Windows 10 machines
- SMB feature: Directory leasing enabled

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.
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

Maximum Local Groups

Maximum Shared Folder

Maximum Shared Folder Sync Tasks

Hybrid Share

Hyper Backup

Folder and Package Backup

Entire System Backup

Notes

RS2423+	Full-system backup requires DSM 7.2 or later.
RS3618xs	Full-system backup requires DSM 7.2 or later.

High Availability

Synology High Availability

Log Center

RS2423+
RS3618xs

Syslog Events per Second

Virtualization

VMware vSphere

RS2423+	ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
RS3618xs	ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5

Microsoft Hyper-V

RS2423+	Windows Server 2022
RS3618xs	Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012

Citrix XenServer

OpenStack

General Specifications

Supported Protocols

RS2423+	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, 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

Supported Browsers

Supported Language

RS2423+	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

Notes

RS2423+	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.

Add-on Packages view the complete package list

Central Management System

Synology AI Console

RS2423+
RS3618xs

Third-Party AI Model Integration

Maximum De-Identification Rate

Notes

RS2423+	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.
RS3618xs	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

RS2423+
RS3618xs

Suggested Users

Notes

RS2423+	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.

Download Station

RS2423+
RS3618xs

Maximum Concurrent Download Tasks

SAN Manager

RS2423+
RS3618xs

Maximum iSCSI Target Number

Maximum LUN

LUN Clone/Snapshot, Windows ODX

Synology MailPlus / MailPlus Server

RS2423+
RS3618xs

Free Email Accounts

RS2423+	5 (Additional accounts require purchase of licenses)
RS3618xs	5 (Additional accounts require purchase of licenses)

Suggested Users

Notes

RS2423+

The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
Models with SSD support are tested with a single SSD volume.
Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
Operating in high-availability mode will incur additional overhead.
Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).

RS3618xs

The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
Models with SSD support are tested with a single SSD volume.
Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
Operating in high-availability mode will incur additional overhead.
Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).

Media Server

RS2423+
RS3618xs

DLNA Compliance

Synology Photos

RS2423+
RS3618xs

Facial Recognition

Object Recognition

Snapshot Replication

RS2423+
RS3618xs

Maximum Snapshots per Shared Folder

Maximum of System Snapshots

Surveillance Station

RS2423+
RS3618xs

Default Licenses

RS2423+	2 (Additional cameras require purchase of licenses)
RS3618xs	2 (Additional cameras require purchase of licenses)

Maximum IP Cameras and Total FPS (H.264)

RS2423+	1080p: 75 channels, 2100 FPS 3M: 75 channels, 1500 FPS 5M: 75 channels, 900 FPS 4K: 55 channels, 550 FPS
RS3618xs	1080p: 75 channels, 2100 FPS 3M: 75 channels, 1500 FPS 5M: 75 channels, 900 FPS 4K: 55 channels, 550 FPS

Maximum IP Cameras and Total FPS (H.265)

RS2423+	1080p: 75 channels, 2250 FPS 3M: 75 channels, 2250 FPS 5M: 75 channels, 1500 FPS 4K: 75 channels, 900 FPS
RS3618xs	1080p: 75 channels, 2250 FPS 3M: 75 channels, 2250 FPS 5M: 75 channels, 1500 FPS 4K: 75 channels, 900 FPS

Notes

RS2423+

Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed.
Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
Use NVR Selector to quickly find a suitable model based on your requirements.
The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.

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 video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.

Synology Drive

RS2423+
RS3618xs

Suggested Users

Maximum Number of Hosted Files

RS2423+	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)

Notes

RS2423+

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.

Synology Office

RS2423+
RS3618xs

Suggested Users

Notes

RS2423+

The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
Models with SSD support are tested with a single SSD volume.
Models with expandable memory are tested with the maximum supported quantity installed.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

RS3618xs

The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
Models with SSD support are tested with a single SSD volume.
Models with expandable memory are tested with the maximum supported quantity installed.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

Virtual Machine Manager

RS2423+
RS3618xs

Recommended Virtual Machine Instances

Recommended Virtual DSM Number (Licenses required)

Notes

RS2423+	The specifications vary depending on system configuration and memory size.
RS3618xs	The specifications vary depending on system configuration and memory size.

VPN Server

RS2423+
RS3618xs

Maximum Connections