Hardware Specifications
CPU

CPU
		CPU Model Intel Xeon Silver 4110 
CPU Quantity 2 
CPU Architecture 64-bit 
CPU Frequency 8-core 2.1 (base) / 3.0 (turbo) GHz 
Hardware Encryption Engine (AES-NI)  
Memory

Memory
		System Memory 32 GB DDR4 ECC RDIMM 
Memory Module Pre-installed 32 GB (16 GB x 2) 
Total Memory Slots 16 
Maximum Memory Capacity 512 GB (32 GB x 16) 
Notes 
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
  • Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
  • For more information on the recommended memory configurations, visit here.

Storage

Storage
		Drive Bays 24 
Maximum Drive Bays with Expansion Unit 48 (RX1217sas x 2) / 72 (FX2421* x 2) 
Compatible Drive Type* (See all supported drives) 
  • 2.5" SAS HDD
  • 2.5" SAS SSD
  • 2.5" SATA SSD

Hot Swappable Drive  
Notes "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. 
External Ports

External Ports
		RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support) 
RJ-45 10GbE LAN Port 2 (with Link Aggregation / Failover support) 
USB 3.2 Gen 1 Port* 2 
Expansion Port 1 
Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. 
PCIe

PCIe
		PCIe Expansion 2 x Gen3 x8 slots (x8 link) 
File System

File System
		Internal Drives 
  • Btrfs
  • EXT4

External Drives 
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT

Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. 
Appearance

Appearance
		Form Factor (RU) 2U 
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm 
Weight 17.26 kg 
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02) 
Notes The rail kit is sold separately 
Others

Others
		System Fan 80 mm x 80 mm x 4 pcs 
Fan Speed Mode 
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode

Easy Replacement System Fan  
Power Recovery  
Noise Level* 53.7 dB(A) 
Scheduled Power On / Off  
Wake on LAN / WAN  
Power Supply Unit / Adapter 800 W 
Redundant Power Supply  
AC Input Power Voltage 100V to 240V AC 
Power Frequency 50/60 Hz, Single Phase 
Power Consumption* 288.49 W (Access)
145.8 W (HDD Hibernation) 
British Thermal Unit 984.37 BTU/hr (Access)
497.49 BTU/hr (HDD Hibernation) 
Notes 
  • Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Toshiba 600GB AL14SEB060N 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

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) 
Relative Humidity 5% to 95% RH 
Certification

Certification
		 
  • FCC
  • CE
  • BSMI
  • EAC
  • KC
  • VCCI
  • RCM

Warranty

Warranty
		 5 Years 
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) 
Environment

Environment
		 RoHS Compliant 
Packaging Content

Packaging Content
		 
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1

Optional Accessories

Optional Accessories
		  
Notes 
  • It is required to use D4RD-2666-16G with identical memory modules of the same capacity and frequency. For more information, visit here.
  • Expansion Unit FX2421 can only be used with identical expansion units.