A compact design for space efficiency
The RS1221+ and its RX418 expansion units are designed to help you save space in compact deployments. At only 30 centimeters, half the length of a typical 2U unit, it fits perfectly snug onto 2-post or shallow rackmount enclosures. 3-year hardware warranty, extendable to 5 years with the purchase of EW202.
Fits into shallow rackmount enclosures
Easy-to-install on 2-post racks

• Hardware Specifications
• RS1221+
• CPU
• CPU Model
• AMD Ryzen V1500B
• CPU Quantity
• 1
• CPU Cores
• 4
• CPU Threads
• 8
• CPU Architecture
• 64-bit
• CPU Frequency
• 2.2 GHz
• Hardware Encryption Engine
• Memory
• System Memory
• 4 GB DDR4 ECC SODIMM
• Memory Module Pre-installed
• 4 GB (4 GB × 1)
• Total Memory Slots
• 2
• Maximum Memory Capacity
• 32 GB (16 GB x 2)
• 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
• 8
• Maximum Drive Bays with Expansion Unit
• 12 (RX418 × 1)
• Drive Type (See all supported drives)
• 3.5" SATA HDD
• 2.5" SATA HDD
• 2.5" SATA SSD
• Hot Swappable Drive*
• External Ports
• RJ-45 1GbE LAN Port
• 4
• USB 3.2 Gen 1 Port
• 2
• Expansion Port
• 1
• Expansion Port Type
• eSATA
• PCIe
• PCIe Expansion
• 1 x Gen3 x8 slot (x4 link)
• Appearance
• Form Factor (RU)
• 2U
• Size (Height x Width x Depth)
• 88 mm × 482 mm × 306.6 mm
• Weight
• 6.9 kg
• Rack Installation Support*
• 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
• 2-post 19" rack (direct mounting)
• Notes
• The rail kit is sold separately
• Others
• System Fan
• 80 mm × 80 mm × 2 pcs
• Fan Speed Mode
• Full-Speed Mode
• Cool Mode
• Quiet Mode
• Power Recovery
• Noise Level*
• 37.8 dB(A)
• Scheduled Power On / Off
• Wake on LAN / WAN
• Power Supply Unit / Adapter
• 250 watts
• Redundant Power Supply
• -
• AC Input Power Voltage
• 100 V to 240 V AC
• Power Frequency
• 50/60 Hz, Single Phase
• Power Consumption
• 49.89 watts (Access)
• 22.64 watts (HDD Hibernation)
• British Thermal Unit
• 170.23 BTU/hr (Access)
• 77.25 BTU/hr (HDD Hibernation)
• Notes
• 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)
• 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
• FCC
• CE
• BSMI
• VCCI
• RCM
• EAC
• CCC
• KC
• BIS
• UL
• Warranty
• 3-year hardware warranty, extendable to 5 years with Extended Warranty Plus
• 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)
• Environment
• RoHS Compliant
• Packaging Content
• Main Unit X 1
• Accessory Pack X 1
• AC Power Cord X 1
• C13 to C14 power cord X 1
• Quick Installation Guide X 1
• Optional Accessories
• DDR4 ECC SODIMM: D4ES04-4G/D4ES01-8G/D4ES03-16G
• Expansion Units: RX418
• 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/M2D18
• 25GbE Network Interface Card: E25G30-F2
• 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1
• Rail Kit Sliding: RKS-02
• Rail Kit Mounted: RKM114*
• Notes
• 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.
• Upgrade to DSM 7.2-64551 or later before installing the M2D18.