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Product comparison · 2 nas & storage servers

QNAP TS-251C NAS/storage server Tower Intel® Celeron® vs QNAP TS-851-4G + 2X 0S03674

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  • 62specifications compared
  • 24differ
  • 38identical
  • 16known for one product only

Key differences

  • Storage drives installed
    • No
    • Yes
  • Total installed storage capacity
    • 0 TB
    • 24 TB
  • Number of storage drives installed
    • 0
    • 8
  • Number of storage drives supported
    • 2
    • 8
  • Storage drive capacity
    • 0 GB
    • 3 TB
  • Storage drive size
    • 3.5"
    • 2.5/3.5"
  • RAID levels
    • 0, 1
    • 0, 1, 5, 6, 10, JBOD
  • Hot-swap drive bays
    • No
    • Yes

Side by side

Differences highlightedShow differences only
78 specifications
A

QNAP

TS-251C NAS/storage server Tower Intel® Celeron®

Model TS-251C

View product
B

QNAP

TS-851-4G + 2X 0S03674View product
Storage9 differ
Storage drives installedDiffersNoYes
Total installed storage capacityDiffers0 TB24 TB
Number of storage drives installedDiffers08
Number of storage drives supportedDiffers28
Storage drive capacityDiffers0 GB3 TB
Storage drive interfaceDiffersSerial ATA IIISerial ATA II, Serial ATA III
Storage drive sizeDiffers3.5"2.5/3.5"
RAID levelsDiffers0, 10, 1, 5, 6, 10, JBOD
Hot-swap drive baysDiffersNoYes
Processoridentical
Number of processors installedKnown for one1
Memory1 differ
Internal memoryDiffers1 GB4 GB
Maximum RAM supportedKnown for one8 GB
Memory slotsKnown for one2
Network1 differ
Ethernet LAN data ratesDiffers1000 Mbit/s10,100,1000 Mbit/s
Ports & interfaces2 differ
Ethernet LAN (RJ-45) portsDiffers12
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers13
Design4 differ
Product colourDiffersWhiteBlack
Number of fansDiffers1 fan(s)2 fan(s)
Fan diameterDiffers6 cm12 cm
LED indicatorsDiffersHDD, LAN, Power, Status, USBYes
Built-in displayKnown for oneNo
Performance1 differ
Backup featuresKnown for oneCloud, iSCSI LUN
BuzzerKnown for oneYes
Multilingual supportKnown for oneYes
Security algorithmsDiffers256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLSFIPS 140-2, HTTPS, SSH, SSL/TLS
Management protocolsKnown for oneSNMP, Telnet
Power2 differ
Power supply locationDiffersExternalBuilt-in
Power supply unit (PSU) capacityDiffers60 W350 W
Power consumption (typical)Known for one15.71 W
Power consumption (sleep)Known for one0.7 W
Fan voltageKnown for one12 V
Weight & dimensions3 differ
WidthDiffers85 mm298.2 mm
DepthDiffers218.4 mm235.4 mm
HeightDiffers166.5 mm185.2 mm
WeightKnown for one3.16 kg
Packaging content1 differ
External power adapterKnown for oneYes
Cables includedDiffersAC, LAN (RJ-45), SATAAC, LAN (RJ-45)
Operational conditionsidentical
Storage relative humidity (H-H)Known for one5 - 95%
Operating relative humidity (H-H)Known for one5 - 95%
Other featuresidentical
Digital Living Network Alliance (DLNA) certifiedKnown 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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