Product comparison · 2 nas & storage servers

QNAP HS-251 NAS/storage server Desktop Intel® Celeron® vs QNAP TS-651 NAS/storage server Tower Intel® Celeron®

63specifications compared
14differ
49identical
11known for one product only

Key differences

Number of storage drives supported
- HS-251 NAS/storage server Desktop Intel® Celeron®:2
- TS-651 NAS/storage server Tower Intel® Celeron®:6
RAID levels
- HS-251 NAS/storage server Desktop Intel® Celeron®:0, 1, JBOD
- TS-651 NAS/storage server Tower Intel® Celeron®:0, 1, 5, 6, 10, JBOD
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
- HS-251 NAS/storage server Desktop Intel® Celeron®:2
- TS-651 NAS/storage server Tower Intel® Celeron®:3
Chassis type
- HS-251 NAS/storage server Desktop Intel® Celeron®:Desktop
- TS-651 NAS/storage server Tower Intel® Celeron®:Tower
Cooling type
- HS-251 NAS/storage server Desktop Intel® Celeron®:Passive
- TS-651 NAS/storage server Tower Intel® Celeron®:Active
Power supply unit (PSU) capacity
- HS-251 NAS/storage server Desktop Intel® Celeron®:60 W
- TS-651 NAS/storage server Tower Intel® Celeron®:250 W
Power consumption (typical)
- HS-251 NAS/storage server Desktop Intel® Celeron®:15.64 W
- TS-651 NAS/storage server Tower Intel® Celeron®:39.42 W
Width
- HS-251 NAS/storage server Desktop Intel® Celeron®:302 mm
- TS-651 NAS/storage server Tower Intel® Celeron®:257 mm

Side by side

Differences highlightedShow differences only

Comparison of HS-251, TS-651
74 specifications	A QNAP HS-251 NAS/storage server Desktop Intel® Celeron® Model HS-251 View product	B QNAP TS-651 NAS/storage server Tower Intel® Celeron® Model TS-651 View product
Storage3 differ
Number of storage drives supportedDiffers	2	6
Storage drive interfaceKnown for one	Unknown — not stated by the source	Serial ATA III
RAID levelsDiffers	0, 1, JBOD	0, 1, 5, 6, 10, JBOD
Supported file systemsDiffers	ext3, ext4, FAT32, HFS+, NTFS	ext4, FAT32, HFS+, NTFS
Memoryidentical
Maximum RAM supportedKnown for one	Unknown — not stated by the source	8 GB
Network1 differ
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, SMSC
Cabling technologyKnown for one	10/100/1000Base-T(X)	Unknown — not stated by the source
Ports & interfaces1 differ
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	2	3
Design2 differ
Chassis typeDiffers	Desktop	Tower
Cooling typeDiffers	Passive	Active
Number of fansKnown for one	Unknown — not stated by the source	2 fan(s)
Fan diameterKnown for one	Unknown — not stated by the source	9 cm
Performanceidentical
Management protocolsKnown for one	SNMP, Telnet	Unknown — not stated by the source
Softwareidentical
Server operating systems supportedKnown for one	Windows Server 2003	Unknown — not stated by the source
Power2 differ
Power supply unit (PSU) capacityDiffers	60 W	250 W
Power consumption (typical)Differs	15.64 W	39.42 W
Power consumption (sleep)Known for one	Unknown — not stated by the source	0.41 W
AC input frequencyKnown for one	Unknown — not stated by the source	50 - 60 Hz
Fan voltageKnown for one	Unknown — not stated by the source	12 V
Weight & dimensions5 differ
WidthDiffers	302 mm	257 mm
DepthDiffers	220 mm	235 mm
HeightDiffers	41.3 mm	175 mm
WeightDiffers	1.56 kg	6.18 kg
Package weightDiffers	2.62 kg	6.9 kg
Packaging contentidentical
External power adapterKnown 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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