Product comparison · 2 nas & storage servers

QNAP TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD vs Seagate HS-251+ NAS Compact Intel® Celeron®

63specifications compared
29differ
34identical
58known for one product only

Key differences

Total installed storage capacity
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:24 TB
- HS-251+ NAS Compact Intel® Celeron®:2 TB
Number of storage drives installed
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:6
- HS-251+ NAS Compact Intel® Celeron®:2
Number of storage drives supported
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:8
- HS-251+ NAS Compact Intel® Celeron®:2
Storage drive capacity
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:4 TB
- HS-251+ NAS Compact Intel® Celeron®:1 TB
RAID levels
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:0, 1, 5, 6, 10, JBOD
- HS-251+ NAS Compact Intel® Celeron®:0, 1, JBOD
Processor family
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:AMD Embedded R-Series SoC
- HS-251+ NAS Compact Intel® Celeron®:Intel® Celeron®
Processor frequency
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:2.1 GHz
- HS-251+ NAS Compact Intel® Celeron®:2 GHz
Internal memory
- TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD:4 GB
- HS-251+ NAS Compact Intel® Celeron®:2 GB

Side by side

Differences highlightedShow differences only

Comparison of TVS-673E-4G, HS-251+
121 specifications	A QNAP TVS-673E-4G NAS Tower AMD Embedded R-Series SoC RX-421BD Model TVS-673E-4G View product	B Seagate HS-251+ NAS Compact Intel® Celeron® Model HS-251+ View product
Storage6 differ
Storage drives installed	Yes	Yes
Total installed storage capacityDiffers	24 TB	2 TB
Number of storage drives installedDiffers	6	2
Number of storage drives supportedDiffers	8	2
Installed storage drive type	HDD	HDD
Supported storage drive types	HDD & SSD	HDD & SSD
Storage drive capacityDiffers	4 TB	1 TB
Storage drive interfaceDiffers	Serial ATA III	Serial ATA, Serial ATA II, Serial ATA III
Supported storage drive interfacesKnown for one	M.2, Serial ATA II, Serial ATA III	Unknown — not stated by the source
Storage drive sizes supportedKnown for one	2.5,3.5"	Unknown — not stated by the source
Number of M.2 (M & B) slotsKnown for one	2	Unknown — not stated by the source
RAID support	Yes	Yes
RAID levelsDiffers	0, 1, 5, 6, 10, JBOD	0, 1, JBOD
Online RAID migrationKnown for one	Yes	Unknown — not stated by the source
Online RAID expansionKnown for one	Yes	Unknown — not stated by the source
RAID rebuildKnown for one	Yes	Unknown — not stated by the source
Hot-swap drive bays	Yes	Yes
Supported file systems	FAT32, HFS+, NTFS, ext3, ext4	FAT32, HFS+, NTFS, ext3, ext4
Bad block scanKnown for one	Yes	Unknown — not stated by the source
Disk roamingKnown for one	Yes	Unknown — not stated by the source
Storage drive sizeKnown for one	Unknown — not stated by the source	2.5/3.5"
Processor2 differ
Processor familyDiffers	AMD Embedded R-Series SoC	Intel® Celeron®
Processor modelKnown for one	RX-421BD	Unknown — not stated by the source
Processor frequencyDiffers	2.1 GHz	2 GHz
Processor boost frequencyKnown for one	3.4 GHz	Unknown — not stated by the source
Processor cores	4	4
Processor operating modesKnown for one	64-bit	Unknown — not stated by the source
On-board graphics card modelKnown for one	AMD Radeon R7	Unknown — not stated by the source
Memory2 differ
Internal memoryDiffers	4 GB	2 GB
Internal memory typeDiffers	DDR4	DDR3L
Maximum RAM supportedKnown for one	64 GB	Unknown — not stated by the source
Memory form factorKnown for one	SO-DIMM	Unknown — not stated by the source
Memory slotsKnown for one	4	Unknown — not stated by the source
Flash memory	512 MB	512 MB
Network1 differ
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
Copper ethernet cabling technologyKnown for one	10BASE-T, 100BASE-T, 1000BASE-T	Unknown — not stated by the source
Wi-Fi	No	No
DHCP client	Yes	Yes
DHCP server	Yes	Yes
Jumbo frames supportKnown for one	Yes	Unknown — not stated by the source
iSCSI support	Yes	Yes
Wake-on-LAN ready	Yes	Yes
Dynamic DNS (DDNS)Known for one	Yes	Unknown — not stated by the source
Supported network protocolsDiffers	CIFS/SMB, AFP (v3.3), NFS (v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC	CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
Ports & interfaces4 differ
Ethernet LAN (RJ-45) portsDiffers	4	2
USB port	Yes	Yes
USB 2.0 ports quantityDiffers	0	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	4	2
Fiber ports quantity	0	0
HDMI ports quantityDiffers	2	1
HDMI versionKnown for one	1.4b	Unknown — not stated by the source
3.5 mm (1/8-inch) outKnown for one	Yes	Unknown — not stated by the source
Microphone inKnown for one	Yes	Unknown — not stated by the source
PCI Express x4 (Gen 3.x) slotsKnown for one	2	Unknown — not stated by the source
Design4 differ
Chassis typeDiffers	Tower	Compact
Cooling typeDiffers	Active	Passive
Product colourDiffers	Gold	Black
Number of fansKnown for one	3 fan(s)	Unknown — not stated by the source
Fan diameterKnown for one	12 cm	Unknown — not stated by the source
Fan diameter 2Known for one	6 cm	Unknown — not stated by the source
LED indicatorsDiffers	Yes	LAN, Status
Built-in displayKnown for one	Yes	Unknown — not stated by the source
Display typeKnown for one	LCD	Unknown — not stated by the source
Cable lock slot	Yes	Yes
Cable lock slot type	Kensington	Kensington
Built-in speaker(s)Known for one	Yes	Unknown — not stated by the source
Number of built-in speakersKnown for one	2	Unknown — not stated by the source
Performanceidentical
Type	NAS	NAS
Device class	Home & Home Office	Home & Home Office
Backup function	Yes	Yes
Backup features	Cloud, iSCSI LUN	Cloud, iSCSI LUN
Multilingual support	Yes	Yes
Third-party supportKnown for one	Yes	Unknown — not stated by the source
Built-in optical driveKnown for one	No	Unknown — not stated by the source
Card reader integratedKnown for one	No	Unknown — not stated by the source
SnapshotKnown for one	Yes	Unknown — not stated by the source
Management protocolsKnown for one	SNMP	Unknown — not stated by the source
Web-based managementKnown for one	Yes	Unknown — not stated by the source
Access Control List (ACL)Known for one	Yes	Unknown — not stated by the source
Backup buttonKnown for one	Yes	Unknown — not stated by the source
Browser supportedKnown for one	Internet Explorer 10+, Chrome, Safari 7+, Firefox	Unknown — not stated by the source
Built-in BitTorrent clientKnown for one	Yes	Unknown — not stated by the source
Built-in FTP server	Yes	Yes
Built-in UPnP AV media serverKnown for one	Yes	Unknown — not stated by the source
Built-in iTunes server	Yes	Yes
Disk scanKnown for one	Yes	Unknown — not stated by the source
Hot spareKnown for one	Yes	Unknown — not stated by the source
On/off switch	Yes	Yes
Password authenticationKnown for one	Yes	Unknown — not stated by the source
S.M.A.R.T. support	Yes	Yes
Security algorithmsKnown for one	256-bit AES, FIPS 140-2, HTTPS, SNMP, SSH, SSL/TLS	Unknown — not stated by the source
Share folderKnown for one	CIFS/SMB	Unknown — not stated by the source
System logKnown for one	Yes	Unknown — not stated by the source
Universal Plug and Play (UPnP)Known for one	Yes	Unknown — not stated by the source
BuzzerKnown for one	Unknown — not stated by the source	Yes
Reset buttonKnown for one	Unknown — not stated by the source	Yes
Software4 differ
Operating system installed	QNAP Turbo System	QNAP Turbo System
Operating system versionDiffers	4.3	4.2
Windows operating systems supportedDiffers	Windows 10, Windows 7, Windows 8	Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 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, Win
Linux operating systems supported	Yes	Yes
Mac compatibilityKnown for one	Yes	Unknown — not stated by the source
Mac operating systems supportedDiffers	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks	Mac OS X 10.0 Cheetah, Mac OS X 10.1 Puma, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.9 Mavericks
Server operating systems supportedDiffers	Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016	Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Power3 differ
Power supply locationDiffers	Built-in	External
Power supply unit (PSU) capacityDiffers	250 W	60 W
Number of power supply unitsKnown for one	1	Unknown — not stated by the source
AC input voltageKnown for one	100-240 V	Unknown — not stated by the source
AC input frequencyDiffers	50 - 60 Hz	100-240 Hz
Power consumption (sleep)Known for one	Unknown — not stated by the source	0.6 W
Weight & dimensions3 differ
WidthDiffers	264.3 mm	302 mm
DepthDiffers	279.6 mm	220 mm
HeightDiffers	188.2 mm	41.3 mm
Packaging contentidentical
Cables included	AC, LAN (RJ-45)	AC, LAN (RJ-45)
Quick installation guide	Yes	Yes
Number of screwsKnown for one	20	Unknown — not stated by the source
External power adapterKnown for one	Unknown — not stated by the source	Yes
Operational conditionsidentical
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%
Other featuresidentical
Digital Living Network Alliance (DLNA) certifiedKnown for one	Yes	Unknown — not stated by the source
Power managementKnown for one	Yes	Unknown — not stated by the source

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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