Intel Atom C3538
4-core 2.1 GHz
Hardware Encryption Engine (AES-NI)
4 GB DDR4 non-ECC SODIMM
Memory Module Pre-installed
4 GB (4 GB x 1)
Total Memory Slots
Maximum Memory Capacity
32 GB (16 GB x 2)
For more information on memory upgrade limitations, visit here.
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.
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.
Maximum Drive Bays with Expansion Unit
24 (DX1215 x 1)
Compatible Drive Type* (See all supported drives)
3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Maximum Internal Raw Capacity
192 TB (16 TB drive x 12) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units
384 TB (192 TB + 16 TB drive x 12) (Capacity may vary by RAID types)
Maximum Single Volume Size*
Hot Swappable Drive
"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.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)
Each internal volume (may consist of multiple drives) is expandable up to 108TB.
RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)
USB 3.0 Port
1 x Gen3 x8 slot (black, x4 link)
PCIe Network Interface Card (Learn more)
M2D18 - Dual M.2 SATA/NVMe SSD adapter card for SSD cache
exFAT Access is purchased separately in Package Center.
Size (Height x Width x Depth)
270 mm x 300 mm x 340 mm
120 mm x 120 mm x 2 pcs
Fan Speed Mode
Easy Replacement System Fan
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter
AC Input Power Voltage
100 V to 240 V AC
50/60 Hz, Single Phase
101.6 W (Access)
43.96 W (HDD Hibernation)
British Thermal Unit
346.9 BTU/hr (Access)
150.09 BTU/hr (HDD Hibernation)
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%
0°C to 40°C (32°F to 104°F)
-20°C to 60°C (-5°F to 140°F)
5% to 95% RH