Hardware Specifications
CPU
CPU	CPU Model	Intel Atom C3538
	CPU Architecture	64-bit
	CPU Frequency	4-core 2.1 GHz
	Hardware Encryption Engine (AES-NI)
Memory
Memory	System Memory	2 GB DDR4 non-ECC
	Total Memory Slots	1
	Memory Expandable up to	18 GB (2GB + 16 GB)
	Notes	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. 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.
Storage
Storage	Drive Bays	4
	Maximum Drive Bays with Expansion Unit	8
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
	Maximum Internal Raw Capacity	64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
	Maximum Raw Capacity with Expansion Units	128 TB (64 TB + 16 TB drive x 4) (Capacity may vary by RAID types)
	Maximum Single Volume Size*	108 TB
	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. 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.
External Ports
External Ports	RJ-45 1GbE LAN Port	4 (with Link Aggregation / Failover support)
	USB 3.0 Port	2
	eSATA Port	1
PCIe
PCIe	PCIe Expansion	1 x Gen3 x8 slot (black, x4 link)
	Add-In-Card Support	PCIe Network Interface Card (Learn more) M2D18 - Dual M.2 SATA/NVMe SSD adapter card for SSD cache
File System
File System	Internal Drives	Btrfs EXT4
	External Drives	Btrfs EXT4 EXT3 FAT NTFS HFS+ exFAT*
	Notes	exFAT Access is purchased separately in Package Center.
Appearance
Appearance	Form Factor (RU)	1U
	Size (Height x Width x Depth)	44 mm x 480 mm x 492.6 mm 44 mm x 480 mm x 518.6 mm (for RP model)
	Weight	6.4 kg 7.96 kg (for RP model)
	Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKM114/RKS1317)
	Notes	The rail kit is sold separately
Others
Others	System Fan	40 mm x 40 mm x 3 pcs 40 mm x 40 mm x 2 pcs (for RP model)
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode
	Power Recovery
	Noise Level*	27 dB(A) 39.9 dB(A) (for RP model)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	150 W
	Redundant Power Supply	yes (for RP model)
	AC Input Power Voltage	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	37.94 W (Access) 20.96 W (HDD Hibernation) 38.88 W (Access) (for RP model) 22.17 W (HDD Hibernation) (for RP model)
	British Thermal Unit	129.54 BTU/hr (Access) 71.57 BTU/hr (HDD Hibernation) 132.75 BTU/hr (Access) (for RP model) 75.70 BTU/hr (HDD Hibernation) (for RP model)
	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
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	EAC VCCI CCC RCM KC FCC CE BSMI
Warranty
Warranty	3-year hardware warranty, extendable to 5-year coverage - EW202
	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 1 AC Power Cord X 2 (for RP model) Quick Installation Guide X 1
Optional Accessories
Optional Accessories	D4NESO-2666-4G DDR4 non-ECC SO-DIMM* D4ECSO-2666-16G DDR4 ECC SO-DIMM* Expansion Unit: RX418 X 1 Synology M2D18 M.2 SSD adapter card Synology Ethernet Adapter E10G18-T2 Synology Ethernet Adapter E10G18-T1 Synology Ethernet Adapter E10G17-F2 Synology Rail Kit Mounted - RKM114 Synology Rail Kit Sliding - RKS1317 VS360HD VS960HD Surveillance Device License Pack
	Notes	All memory modules will operate at the maximum frequency specified by the CPU manufacturer. This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.