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Product comparison · 2 nas & storage servers

QNAP EXT1-TS-251-4G NAS/storage server Tower Intel® Celeron® vs QNAP TS-851 + 8X ST2000NC000

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  • 55specifications compared
  • 20differ
  • 35identical
  • 35known for one product only

Key differences

  • Storage drives installed
    • No
    • Yes
  • Total installed storage capacity
    • 8 TB
    • 16 TB
  • Number of storage drives installed
    • 0
    • 8
  • Number of storage drives supported
    • 2
    • 8
  • Storage drive capacity
    • 4 TB
    • 2 TB
  • RAID levels
    • 0, 1, JBOD
    • 0, 1, 5, 6, 10, JBOD
  • Internal memory
    • 4 GB
    • 1 GB
  • USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
    • 2
    • 3

Side by side

Differences highlightedShow differences only
90 specifications
A

QNAP

EXT1-TS-251-4G NAS/storage server Tower Intel® Celeron®

Model EXT1-TS-251-4G

View product
B

QNAP

TS-851 + 8X ST2000NC000View product
Storage7 differ
Storage drives installedDiffersNoYes
Total installed storage capacityDiffers8 TB16 TB
Number of storage drives installedDiffers08
Number of storage drives supportedDiffers28
Supported storage drive typesHDD & SSDHDD & SSD
Storage drive capacityDiffers4 TB2 TB
Storage drive interfaceDiffersSerial ATA, Serial ATA II, Serial ATA IIISerial ATA II, Serial ATA III
Storage drive size2.5/3.5"2.5/3.5"
Maximum supported storage capacityKnown for one8 TB
RAID supportYesYes
RAID levelsDiffers0, 1, JBOD0, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Installed storage drive typeKnown for oneHDD
Supported file systemsKnown for oneext3, ext4, FAT32, HFS+, NTFS
Processoridentical
Processor familyIntel® Celeron®Intel® Celeron®
Processor frequency2.41 GHz2.41 GHz
Processor cores22
Memory1 differ
Internal memoryDiffers4 GB1 GB
Internal memory typeDDR3LDDR3L
Memory clock speedKnown for one1333 MHz
Flash memory512 MB512 MB
Maximum RAM supportedKnown for one8 GB
Memory slotsKnown for one2
Networkidentical
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP clientKnown for oneYes
DHCP serverKnown for oneYes
Jumbo frames supportKnown for oneYes
iSCSI supportKnown for oneYes
Wake-on-LAN readyKnown for oneYes
Supported network protocolsKnown for oneCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Ports & interfaces1 differ
Ethernet LAN (RJ-45) ports22
USB 2.0 ports quantity22
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers23
Fiber ports quantity00
HDMI ports quantity11
Design4 differ
Chassis typeTowerTower
Cooling typeActiveActive
Product colourDiffersWhiteBlack
Number of fansDiffers1 fan(s)2 fan(s)
Fan diameterDiffers7 cm12 cm
LED indicatorsDiffersHDD, LAN, Status, USBYes
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performance2 differ
TypeNASNAS
Device classHome & Home OfficeHome & Home Office
Backup functionYesYes
Backup featuresKnown for oneCloud
BuzzerKnown for oneYes
Multilingual supportKnown for oneYes
Management protocolsDiffersCIFS/SMB, AFP, FTPSNMP, Telnet
Share folder access right managementKnown for oneYes
Web-based managementYesYes
Access Control List (ACL)YesYes
Browser supportedKnown for oneChrome, Firefox, IE, Safari
Built-in FTP serverKnown for oneYes
Built-in iTunes serverKnown for oneYes
On/off switchYesYes
Reset buttonYesYes
S.M.A.R.T. supportKnown for oneYes
Security algorithmsDiffersHTTPS, SSHFIPS 140-2, HTTPS, SSH, SSL/TLS
Share folderKnown for oneCIFS/SMB
Softwareidentical
Operating system installedQNAP Turbo SystemQNAP Turbo System
Operating system version4.14.1
Bundled softwareKnown for oneDropbox, Google Cloud Storage Sync, McAfee, WordPress, HappyGet II
Windows operating systems supportedKnown for oneWindows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
Linux operating systems supportedKnown for oneYes
Mac operating systems supportedKnown for oneYes
Server operating systems supportedKnown for oneWindows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64
Pre-installed softwareKnown for oneChrome, IE 10+, Firefox, Safari
Power2 differ
Power supply locationDiffersExternalBuilt-in
Power supply unit (PSU) capacityDiffers60 W350 W
Number of power supply units11
Power consumption (typical)Known for one19.22 W
Power consumption (sleep)Known for one0.47 W
AC input voltage100-240 V100-240 V
Fan voltage12 V12 V
AC input frequencyKnown for one50 - 60 Hz
Weight & dimensions3 differ
WidthDiffers102 mm298.2 mm
DepthDiffers225 mm235.4 mm
HeightDiffers168.5 mm185.2 mm
WeightKnown for one1.28 kg
Packaging contentidentical
External power adapterKnown for oneYes
Cables includedAC, LAN (RJ-45)AC, LAN (RJ-45)
Quick start guideKnown for oneYes
Quick installation guideKnown for oneYes
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

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