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Average rating
Most helpful review
  • 5 / 5 stars
    10/10
    "Most complete home office Synology NAS"
  • 4.5 / 5 stars
    9.2/10
    "Great home solution for storage and media"
  • 4.5 / 5 stars
    8.8/10
    "Great device"

Product number
  • 872191
  • 869007
  • 841542
  • 880848
  • 880854
Manufacturer code
  • DS1621+
  • DS1520+
  • RS820+
  • TS-h973AX-8G
  • TS-673A-8G
Brand
  • Synology
  • Synology
  • Synology
  • QNAP
  • QNAP
Warranty
  • 3 years
  • 3 years
  • 3 years
  • 3 years
  • 3 years
Warranty type
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
Old product returned for free
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes

Number of hard drive bays
  • 6
  • 5
  • 4
  • 9
  • 6
Internal RAM
  • 4 GB
  • 8 GB
  • 2 GB
  • 8 GB
  • 8 GB
Total number of RAM slots
  • 1
  • 1
  • 1
  • 2
  • 2
Integrated hard drive
  • No
  • No
  • No
  • No
  • No
Suitable for hard drive size
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD, M.2
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD, M.2
Cache memory
  • 0 MB
  • 0 MB
  • 8 MB
  • 5 GB
  • 5 GB
SATA connector type
  • eSATA
  • S-ATA (III)
  • S-ATA (III)
  • PCI-e 3.0 x4, U.2
  • PCI-e 2.0 x4, PCI-e 3.0 x4
RAID
  • JBOD, RAID 0, RAID 1, RAID 10, RAID 5, RAID 6, Synology Hybrid RAID
  • Hot spare, JBOD, RAID 0, RAID 1, RAID 10, RAID 5, RAID 6, Synology Hybrid RAID
  • RAID 0, RAID 1, RAID 10, RAID 5, RAID 5+spare, RAID 6, RAID-10+spare, RAID-6 + spare, Synology Hybrid RAID
  • Hot spare, JBOD, RAID 0, RAID 1, RAID 10, RAID 5, RAID 5+spare, RAID 6, RAID-10+spare, RAID-6 + spare
  • Hot spare, JBOD, RAID 0, RAID 1, RAID 10, RAID 5, RAID 5+spare, RAID 6, RAID-10+spare, RAID-6 + spare

NAS functions
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, FTP server, Mail server, Media server, Photo server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Print server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Print server, Surveillance station, VPN server, Web server, iTunes server
NAS application center
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
DLNA
  • No
  • Yes
  • No
  • Yes
  • Yes
UPnP AV support
  • No
  • No
  • No
  • Yes
  • Yes
FTP server
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
On/off switch
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Kensington lock
  • Yes
  • Yes
  • No
  • Yes
  • No
Apple Time Machine support
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Chromecast support
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Maximum number of simultaneous users
  • More than 10
  • More than 10
  • More than 10
  • More than 10
  • More than 10
Number of IP camera licenses included
  • 2
  • 2
  • None
  • 8
  • 8
Plex support
  • No
  • Yes
  • Yes
  • Yes
  • Yes
Automatic switch on/off
  • Yes
  • Yes
  • No
  • Yes
  • Yes
Suitable for IFTTT
  • No
  • No
  • No
  • Yes
  • Yes
Recommended for use
  • Business use, Making a backup, Media streaming, Personal cloud
  • Business use, Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
  • Business use, Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
  • Business use, Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
  • Business use, Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
Plex support type
  • 4K (Ultra HD) (2160p)
  • HD Ready (720p)
  • Full HD (1080p), HD Ready (720p), SD (480p)
  • Full HD (1080p), HD Ready (720p), SD (480p)

Best tested
  • No
  • No
  • No
  • No
  • No

LACP Link aggregation
  • No
  • Yes
  • Yes
  • Yes
  • Yes
iSCSI support
  • Yes
  • No
  • Yes
  • Yes
  • Yes
Thunderbolt connector
  • No
  • No
  • No
  • No
  • No
Bluetooth
  • No
  • No
  • No
  • No
Connection type
  • Wired
  • Wired
  • Wired
  • Wired
  • Wired
Ethernet speed
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
  • 10GB Ethernet (10,000Mbps)
  • 2.5 Gigabit Ethernet (2500 Mbps)
Number of ethernet ports
  • 4
  • 4
  • 4
  • 3
  • 2
Number of female standard USB-A ports
  • 2
Female standard USB-A port version
  • 3.0

Processor
  • AMD Ryzen 3
  • Intel Celeron
  • Intel Atom
  • AMD Ryzen 3
Processor brand
  • AMD
  • Intel
  • Intel
  • AMD
  • AMD
Processor family
  • Ryzen 3
  • Celeron
  • Atom
  • Ryzen 3
Processor cores
  • Quad-Core (4)
  • Quad-Core (4)
  • Quad-Core (4)
  • Quad-Core (4)
  • Quad-Core (4)
Clock speed
  • 2,2 GHz
  • 2 GHz
  • 2,1 GHz
  • 2,2 GHz
  • 2,2 GHz
Turbo speed
  • 2,2 GHz
  • 2,4 GHz
  • 2,1 GHz
Processor code name
  • Gemini Lake Refresh
  • Atom
  • Ryzen

Depth
  • 24,3 cm
  • 23 cm
  • 45,76 cm
  • 22,4 cm
  • 38,3 cm
Width
  • 28,2 cm
  • 23 cm
  • 43,05 cm
  • 22,5 cm
  • 25,5 cm
Height
  • 16,6 cm
  • 17 cm
  • 4,4 cm
  • 18,3 cm
  • 34,5 cm
Type NAS
  • Upright
  • Upright
  • Rackmount
  • Upright
  • Upright
Color
  • Black
  • Black
  • Black
  • Black
  • Black
Weight
  • 5,1 kg
  • 2620 g
  • 6,4 kg
  • 3,52 kg
  • 7,53 kg



© 1999 - 2021 - Coolblue B.V.
Rating by costumers:
Kiyoh 9.2 / 10 - 20,288 reviews