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Product comparison · 2 nas & storage servers

QNAP TS-251 NAS/storage server Tower Intel® Celeron® vs QNAP TS-420, 4x2TB, 2xD-Link DCS-932L

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  • 58specifications compared
  • 27differ
  • 31identical
  • 25known for one product only

Key differences

  • Storage drives installed
    • No
    • Yes
  • Number of storage drives installed
    • 0
    • 4
  • Number of storage drives supported
    • 2
    • 4
  • Supported storage drive types
    • HDD & SSD
    • HDD
  • Storage drive interface
    • Serial ATA III
    • Serial ATA, Serial ATA II
  • Processor family
    • Intel® Celeron®
    • Marvell
  • Processor frequency
    • 2.41 GHz
    • 1.6 GHz
  • Internal memory
    • 1 GB
    • 0.5 GB

Side by side

Differences highlightedShow differences only
83 specifications
A

QNAP

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

Model TS-251

View product
B

QNAP

TS-420, 4x2TB, 2xD-Link DCS-932LView product
Storage6 differ
Storage drives installedDiffersNoYes
Total installed storage capacityKnown for one8 TB
Number of storage drives installedDiffers04
Number of storage drives supportedDiffers24
Installed storage drive typeKnown for oneHDD
Supported storage drive typesDiffersHDD & SSDHDD
Storage drive capacityKnown for one2 TB
Storage drive interfaceDiffersSerial ATA IIISerial ATA, Serial ATA II
Storage drive size2.5/3.5"2.5/3.5"
Maximum supported storage capacityKnown for one16 TB
RAID supportYesYes
RAID levelsDiffers0, 1, JBOD0, 1, 5, 5+0, 5+1, 6, 10, JBOD
Hot-swap drive baysYesYes
Supported file systemsext3, ext4, FAT32, HFS+, NTFSext3, ext4, FAT32, HFS+, NTFS
Processor2 differ
Processor familyDiffersIntel® Celeron®Marvell
Processor frequencyDiffers2.41 GHz1.6 GHz
Processor coresKnown for one2
Memory3 differ
Internal memoryDiffers1 GB0.5 GB
Internal memory typeDiffersDDR3LDDR3
Flash memoryDiffers512 MB16 MB
Maximum RAM supportedKnown for one8 GB
Network1 differ
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiKnown for oneNo
DHCP clientYesYes
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Supported network protocolsDiffersCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSCTCP/ IP
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
eSATA ports quantityKnown for one2
HDMI ports quantityKnown for one1
Design3 differ
Chassis typeTowerTower
Cooling typeActiveActive
Product colourDiffersWhiteBlack
Number of fans1 fan(s)1 fan(s)
Fan diameterDiffers7 cm9 cm
LED indicatorsDiffersYeseSATA, HDD, LAN, Power, Status, USB
Display typeKnown for oneLCD
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Built-in displayKnown for oneNo
Performance2 differ
TypeNASNAS
Backup functionYesYes
BuzzerYesYes
Multilingual supportYesYes
Number of usersKnown for one4096 user(s)
Management protocolsDiffersSNMP v2 & v3SNMP (v2/v3)
Access Control List (ACL)YesYes
On/off switchKnown for oneYes
Reset buttonYesYes
Security algorithmsDiffers256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLSSSL/TLS
Device classKnown for oneHome & Home Office
Built-in optical driveKnown for oneNo
Card reader integratedKnown for oneNo
Web-based managementKnown for oneYes
Software3 differ
Operating system installedDiffersQNAP Turbo SystemQNAP Turbo NAS System
Operating system versionDiffers4.14.0
Windows operating systems supportedDiffersYesWindows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Win
Linux operating systems supportedKnown for oneYes
Mac operating systems supportedYesYes
Server operating systems supportedKnown for oneWindows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012
Power2 differ
Power supply locationKnown for oneExternal
Power supply unit (PSU) capacityDiffers60 W120 W
Power consumption (typical)Differs19.22 W31 W
Power consumption (sleep)Known for one13 W
AC input voltage100-240 V100-240 V
AC input frequencyKnown for one50 - 60 Hz
Redundant power supply (RPS) supportKnown for oneNo
Fan voltageKnown for one12 V
Weight & dimensions5 differ
WidthDiffers102 mm180 mm
DepthDiffers225 mm235 mm
HeightDiffers168.5 mm177 mm
WeightDiffers1.28 kg3 kg
Package weightDiffers2.32 kg4.66 kg
Packaging contentidentical
External power adapterYesYes
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) 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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