CPU	CPU Model	Realtek RTD1296
	CPU Quantity	1
	CPU Architecture	64-bit
	CPU Frequency	4-core 1.4 GHz
	Hardware Encryption Engine
Memory	System Memory	1 GB DDR4 non-ECC
	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.
Storage	Drive Bays	4
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 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	RJ-45 1GbE LAN Port	1
	USB 3.2 Gen 1 Port*	2
	Notes	The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System	Internal Drives	EXT4
	External Drives	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	Size (Height x Width x Depth)	184 mm x 168 mm x 230 mm
	Weight	2.21 kg
Others	System Fan	80 mm x 80 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode Low-power Mode
	Brightness Adjustable Front LED Indicators
	Power Recovery
	Noise Level*	20.6 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	90 W
	AC Input Power Voltage	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	21.71 W (Access) 7.88 W (HDD Hibernation)
	British Thermal Unit	74.08 BTU/hr (Access) 26.89 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 40°C (32°F to 104°F)
	Storage Temperature	-20°C to 60°C (-5°F to 140°F)
	Relative Humidity	5% to 95% RH
Certification	EAC CCC FCC CE BSMI VCCI RCM
Warranty	2 Years

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NAS - MAIN UNIT - Synology DS420j 4-Bay NAS Storage (Realtek RTD1296 Quad Core 1.4 GHz, 1GB DDR4,1 X 1GbE LAN) - DS420j

CPU

Memory

Storage

External Ports

File System

Appearance

Others

Temperature

Certification

Warranty