CPU	CPU Model	Intel Xeon D-1527
	CPU Quantity	1
	CPU Architecture	64-bit
	CPU Frequency	4-core 2.2 (base) / 2.7 (turbo) GHz
	Hardware Encryption Engine (AES-NI)
Memory	System Memory	8 GB DDR4 ECC SODIMM
	Memory Module Pre-installed	8 GB (8 GB x 1)
	Total Memory Slots	2
	Maximum Memory Capacity	32 GB (16 GB x 2)
	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 more information on the recommended memory configurations, visit here.
Storage	Drive Bays	6
	Maximum Drive Bays with Expansion Unit	16 (DX517 x 2)
	M.2 Drive Slots	2 (NVMe)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD M.2 2280 NVMe 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	2 (with Link Aggregation / Failover support)
	RJ-45 10GbE LAN Port	1
	USB 3.2 Gen 1 Port*	3
	eSATA 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.
PCIe	PCIe Expansion	1 x Gen3 x8 slot (x8 link)
File System	Internal Drives	Btrfs EXT4
	External Drives	Btrfs 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)	166 mm x 282 mm x 243 mm
	Weight	5.3 kg
Others	System Fan	92 mm x 92 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode
	Easy Replacement System Fan
	Brightness Adjustable Front LED Indicators
	Power Recovery
	Noise Level*	25.2 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	250 W
	AC Input Power Voltage	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	62.85 W (Access) 34.26 W (HDD Hibernation)
	British Thermal Unit	214.45 BTU/hr (Access) 116.89 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	FCC CE BSMI EAC CCC KC VCCI RCM
Warranty	5 Years
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment	RoHS Compliant
Packaging Content	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 1 RJ-45 LAN Cable X 2 Quick Installation Guide X 1
Optional Accessories	DDR4 ECC SODIMM: D4ES01-8G DDR4 ECC SODIMM: D4ECSO-2666-16G Expansion Units: DX517 3.5" SATA HDD: HAT5300 2.5" SATA SSD: SAT5210 M.2 2280 NVMe SSD: SNV3410 25GbE Network Interface Card: E25G21-F2 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1 VisualStation: VS360HD Surveillance Device License Pack
	Notes	All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

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Synology DS1621XS+ 6-Bay NAS Storage (Intel Xeon D-1527 Quad Core 2.2 GHz, 8GB ECC DDR4, 2 x GbE)