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Product comparison · 2 nas & storage servers

QNAP TS-873U-4G NAS Rack (2U) RX-421ND vs QNAP TVS-873-16G NAS Tower RX-421BD

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  • 77specifications compared
  • 24differ
  • 53identical
  • 22known for one product only

Key differences

  • Number of storage drives supported
    • 8
    • 10
  • Storage drive interface
    • Serial ATA III
    • M.2, Serial ATA III
  • Processor model
    • RX-421ND
    • RX-421BD
  • Internal memory
    • 4 GB
    • 16 GB
  • Ethernet LAN data rates
    • 10,100,1000,10000 Mbit/s
    • 10,100,1000 Mbit/s
  • USB 2.0 ports quantity
    • 4
    • 0
  • USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
    • 2
    • 4
  • Fiber ports quantity
    • 2
    • 0

Side by side

Differences highlightedShow differences only
99 specifications
A

QNAP

TS-873U-4G NAS Rack (2U) RX-421ND

Model TS-873U-4G

View product
B

QNAP

TVS-873-16G NAS Tower RX-421BD

Model TVS-873-16G

View product
Storage3 differ
Storage drives installedYesYes
Total installed storage capacity16000 TB16000 TB
Number of storage drives installed88
Number of storage drives supportedDiffers810
Installed storage drive typeHDDHDD
Supported storage drive typesHDD & SSDHDD & SSD
Storage drive capacity2 TB2 TB
Storage drive interfaceDiffersSerial ATA IIIM.2, Serial ATA III
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
Supported file systemsDiffersFAT32, HFS+, NTFS, exFAT, ext3, ext4FAT32, HFS+, NTFS, ext3, ext4
Bad block scanKnown for oneYes
Processor1 differ
Processor modelDiffersRX-421NDRX-421BD
Processor frequency2.1 GHz2.1 GHz
Processor boost frequencyKnown for one3.4 GHz
Memory1 differ
Internal memoryDiffers4 GB16 GB
Internal memory typeDDR4DDR4
Maximum RAM supported64 GB64 GB
Memory slots44
Flash memory512 MB512 MB
Memory form factorKnown for oneUDIMM
Network2 differ
Ethernet LANYesYes
Ethernet LAN data ratesDiffers10,100,1000,10000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP clientYesYes
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Link aggregationYesYes
Supported network protocolsDiffersIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSCCIFS/SMB, SMB2.1, SMB3.0, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Dynamic DNS (DDNS)Known for oneYes
Ports & interfaces3 differ
Ethernet LAN (RJ-45) ports44
USB portYesYes
USB 2.0 ports quantityDiffers40
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers24
Fiber ports quantityDiffers20
HDMI ports quantityKnown for one2
Fiber optic connectorKnown for oneSFP+
PCI Express x4 (Gen 3.x) slotsKnown for one1
Design4 differ
Chassis typeDiffersRack (2U)Tower
Cooling typeActiveActive
Product colourDiffersBlackGold
Number of fans2 fan(s)2 fan(s)
Fan diameterDiffers7 cm12 cm
LED indicatorsDiffersYesHDD, LAN, Power, Status, USB
Built-in displayKnown for oneYes
Display typeKnown for oneLCD
Cable lock slotKnown for oneYes
Cable lock slot typeKnown for oneKensington
Performance3 differ
TypeNASNAS
Device classSmall & Medium BusinessSmall & Medium Business
Backup functionYesYes
Backup featuresDiffersCloud, USB drive, iSCSI LUNCloud, iSCSI LUN
BuzzerKnown for oneYes
Multilingual supportYesYes
Share folder access right managementYesYes
Web-based managementYesYes
Access Control List (ACL)YesYes
Browser supportedDiffersInternet Explorer 10, Firefox 8, Safari 4, Google ChromeMicrosoft Internet Explorer 10+, Mozilla Firefox 8+, Apple Safari 4+, Google Chrome
Built-in FTP serverYesYes
Built-in UPnP AV media serverKnown for oneYes
Built-in iTunes serverYesYes
Disk scanKnown for oneYes
Hot spareYesYes
On/off switchYesYes
Password authenticationYesYes
Remotely operatedKnown for oneYes
Reset buttonYesYes
S.M.A.R.T. supportYesYes
Security algorithmsDiffers256-bit AES, FIPS 140-2, SNMP, SNMPv3, SSL/TLS256-bit AES, AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
Share folderCIFS/SMBCIFS/SMB
System logYesYes
Universal Plug and Play (UPnP)Known for oneYes
Softwareidentical
Operating system installedQNAP Turbo SystemQNAP Turbo System
Operating system version4.34.3
Windows operating systems supportedKnown for oneWindows 10 Enterprise, Windows 7 Enterprise, Windows 8 Enterprise
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 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Power2 differ
Power supply locationBuilt-inBuilt-in
Power supply unit (PSU) capacityDiffers250 W240 W
Number of power supply units11
AC input voltageDiffers100 - 240 V100-240 V
AC input frequency50 - 60 Hz50 - 60 Hz
Output currentKnown for one3.5 A
Fan voltageKnown for one12 V
Weight & dimensions4 differ
WidthDiffers482 mm329.3 mm
DepthDiffers534 mm279.6 mm
HeightDiffers89 mm188.2 mm
WeightDiffers9.85 kg6.52 kg
Packaging content1 differ
Cables includedAC, LAN (RJ-45)AC, LAN (RJ-45)
Quick installation guideYesYes
Number of screwsDiffers5624
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

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