UC3200
FS2500

RS4021xs+

Synology Rackmount 4021xs+  Intel Xeon D-1541 16GB 3U 16 bays

Description

RS4021xs+

Hardware Specifications
CPU
CPU ModelIntel Xeon D-1541
CPU Quantity1
CPU Core8
CPU Architecture64-bit
CPU Frequency2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory16 GB DDR4 ECC UDIMM
Memory Module Pre-installed16 GB (16 GB x 1)
Total Memory Slots4
Maximum Memory Capacity64 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.
Storage
Drive Bays16
Maximum Drive Bays with Expansion Unit40 (RX1217 x 2)
Drive Type
  • 3.5″ SATA HDD
  • 2.5″ SATA SSD
Hot Swappable Drive*
NotesSynology 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 Port4
RJ-45 10GbE LAN Port2
USB 3.2 Gen 1 Port2
Expansion Port2
Expansion Port TypeInfiniband
PCIe
PCIe Expansion2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU)3U
Size (Height x Width x Depth)132.3 mm x 482 mm x 656.5 mm
Weight17.4 kg
Rack Installation Support*4-post 19″ rack (Synology Rail Kit – RKS-02)
NotesThe rail kit is sold separately
Others
System Fan80 mm x 80 mm x 3 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level*44.7 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter800 watts
550 watts*
Redundant Power Supply
AC Input Power Voltage100 V to 240 V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*145.79 watts (Access)
62.68 watts (HDD Hibernation)
British Thermal Unit497.14 BTU/hr (Access)
213.74 BTU/hr (HDD Hibernation)
Notes
  • Power supply specifications vary by hardware revision. An 800 W PSU is used in devices with serial numbers containing T2R (5th to 7th digits), while a 550 W PSU is in devices with ULR and VR4 serial numbers.
  • 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 Temperature0°C to 35°C (32°F to 95°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Operating Humidity8% to 80% RH
Storage Humidity5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty
5 Years
NotesThe warranty period starts from the purchase date as stated on your purchase receipt.
Environment
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  • DDR4 ECC UDIMM: D4EC-2666-16G
  • Expansion Units: RX1217/RX121RP
  • 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
  • 25GbE Network Interface Card: E25G30-F2
  • 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
NotesAll memory modules will operate at the maximum frequency specified by the CPU manufacturer.

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