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Product comparison · 2 nas & storage servers

QNAP TS-420U + 4x 1TBWDRED vs QNAP TS-421U + 4x 1TBWDRED

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  • 67specifications compared
  • 2differ
  • 65identical
  • 1known for one product only

Key differences

The QNAP TS-421U + 4x 1TBWDRED has 0.4 GHz more processor frequency than the QNAP TS-420U + 4x 1TBWDRED (2 GHz vs 1.6 GHz). Operating system installed: QNAP Firmware on the QNAP TS-420U + 4x 1TBWDRED, QNAP Turbo System on the QNAP TS-421U + 4x 1TBWDRED.

  • Processor frequency
    • 1.6 GHz
    • 2 GHz
  • Operating system installed
    • QNAP Firmware
    • QNAP Turbo System

Side by side

Differences highlightedShow differences only
68 specifications
A

QNAP

TS-420U + 4x 1TBWDREDView product
B

QNAP

TS-421U + 4x 1TBWDREDView product
Storageidentical
Storage drives installedYesYes
Total installed storage capacity4 TB4 TB
Number of storage drives installed44
Number of storage drives supported44
Installed storage drive typeHDDHDD
Supported storage drive typesHDDHDD
Storage drive capacity1 TB1 TB
Storage drive interfaceSerial ATA, Serial ATA IISerial ATA, Serial ATA II
Storage drive size2.5/3.5"2.5/3.5"
RAID supportYesYes
RAID levels0, 1, 5, 6, 10, JBOD0, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Processor1 differ
Processor familyMarvellMarvell
Processor frequencyDiffers1.6 GHz2 GHz
Memoryidentical
Internal memory1 GB1 GB
Internal memory typeDDR3DDR3
Flash memory16 MB16 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
eSATA ports quantity22
Designidentical
Chassis typeRack (1U)Rack (1U)
Cooling typeActiveActive
Product colourBlackBlack
Number of fans1 fan(s)1 fan(s)
Fan diameter4 cm4 cm
LED indicatorsHDD, LAN, Status, USBHDD, LAN, Status, USB
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performanceidentical
TypeNASNAS
Device classSmall & Medium BusinessSmall & Medium Business
Backup functionYesYes
BuzzerYesYes
Multilingual supportYesYes
Number of users4096 user(s)4096 user(s)
On/off switchYesYes
Reset buttonYesYes
Security algorithmsKnown for oneHTTPS, SSH, SSL/TLS
Software1 differ
Operating system installedDiffersQNAP FirmwareQNAP Turbo System
Windows operating systems supportedWindows 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, WinWindows 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 supportedYesYes
Mac operating systems supportedYesYes
Server operating systems supportedWindows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Other operating systems supportedAndroidAndroid
Poweridentical
Power supply locationBuilt-inBuilt-in
Power supply unit (PSU) capacity250 W250 W
Number of power supply units11
AC input voltage100-240 V100-240 V
AC input frequency50 - 60 Hz50 - 60 Hz
Fan voltage12 V12 V
Weight & dimensionsidentical
Width439 mm439 mm
Depth483 mm483 mm
Height44 mm44 mm
Packaging contentidentical
External power adapterNoNo
Cables includedAC, LAN (RJ-45)AC, LAN (RJ-45)
Quick installation guideYesYes
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Operating relative humidity (H-H)5 - 95%5 - 95%

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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