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Product comparison · 2 nas & storage servers

QNAP TS-251, 4TB vs QNAP TS-451-4G, 16TB

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  • 68specifications compared
  • 13differ
  • 55identical
  • 5known for one product only

Key differences

  • Total installed storage capacity
    • 4 TB
    • 16 TB
  • Number of storage drives supported
    • 2
    • 4
  • RAID levels
    • 0, 1, JBOD
    • 0, 1, 5, 6, 10, JBOD
  • Internal memory
    • 1 GB
    • 4 GB
  • Fan diameter
    • 7 cm
    • 12 cm
  • Management protocols
    • SNMP v2 & v3
    • SNMP, Telnet
  • Power supply unit (PSU) capacity
    • 60 W
    • 90 W
  • Width
    • 102 mm
    • 180 mm

Side by side

Differences highlightedShow differences only
73 specifications
A

QNAP

TS-251, 4TBView product
B

QNAP

TS-451-4G, 16TBView product
Storage3 differ
Storage drives installedYesYes
Total installed storage capacityDiffers4 TB16 TB
Number of storage drives supportedDiffers24
Installed storage drive typeHDDHDD
Supported storage drive typesHDD & SSDHDD & SSD
Storage drive interfaceSerial ATA IIISerial ATA III
Storage drive size2.5/3.5"2.5/3.5"
RAID supportYesYes
RAID levelsDiffers0, 1, JBOD0, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Supported file systemsext3, ext4, FAT32, HFS+, NTFSext3, ext4, FAT32, HFS+, NTFS
Processoridentical
Processor familyIntel® Celeron®Intel® Celeron®
Processor frequency2.41 GHz2.41 GHz
Processor cores22
Memory1 differ
Internal memoryDiffers1 GB4 GB
Internal memory typeDDR3LDDR3L
Maximum RAM supported8 GB8 GB
Memory slots22
Flash memory512 MB512 MB
Networkidentical
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP clientYesYes
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Supported network protocolsCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSCCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Ports & interfacesidentical
Ethernet LAN (RJ-45) ports22
USB 2.0 ports quantity22
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity22
Fiber ports quantity00
HDMI ports quantity11
Design1 differ
Chassis typeTowerTower
Cooling typeActiveActive
Product colourWhiteWhite
Number of fans1 fan(s)1 fan(s)
Fan diameterDiffers7 cm12 cm
LED indicatorsYesYes
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performance2 differ
TypeNASNAS
Device classHome & Home OfficeHome & Home Office
Backup functionYesYes
Backup featuresCloudCloud
BuzzerYesYes
Multilingual supportYesYes
Management protocolsDiffersSNMP v2 & v3SNMP, Telnet
Web-based managementYesYes
Access Control List (ACL)YesYes
Reset buttonYesYes
Security algorithmsDiffers256-bit AES, FIPS 140-2, SSH, SSL/TLS256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
Softwareidentical
Operating system installedQNAP Turbo NAS SystemQNAP Turbo NAS System
Operating system version4.14.1
Windows operating systems supportedYesYes
Linux operating systems supportedKnown for oneYes
Mac operating systems supportedYesYes
Power1 differ
Power supply locationExternalExternal
Power supply unit (PSU) capacityDiffers60 W90 W
Number of power supply unitsKnown for one1
Power consumption (typical)Known for one31.07 W
Power consumption (sleep)Known for one0.55 W
AC input voltage100-240 V100-240 V
Fan voltage12 V12 V
Weight & dimensions5 differ
WidthDiffers102 mm180 mm
DepthDiffers225 mm235 mm
HeightDiffers168.5 mm177 mm
WeightDiffers1.28 kg3 kg
Package weightDiffers2.32 kg4.3 kg
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Operating relative humidity (H-H)5 - 95%5 - 95%
Other featuresidentical
Digital Living Network Alliance (DLNA) certifiedYesYes
Packaging contentidentical
External power adapterKnown for oneYes

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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