Product comparison · 2 nas & storage servers

QNAP TS-251-4G, 8TB vs QNAP TS-451-4G, 8TB

68specifications compared
11differ
57identical
5known for one product only

Key differences

The QNAP TS-451-4G, 8TB has 2 more storage drives supported than the QNAP TS-251-4G, 8TB (4 vs 2). The QNAP TS-451-4G, 8TB has 5 cm more fan diameter than the QNAP TS-251-4G, 8TB (12 cm vs 7 cm). The QNAP TS-451-4G, 8TB has 30 W more power supply unit (PSU) capacity than the QNAP TS-251-4G, 8TB (90 W vs 60 W). RAID levels: 0, 1, JBOD on the QNAP TS-251-4G, 8TB, 0, 1, 5, 6, 10, JBOD on the QNAP TS-451-4G, 8TB. Management protocols: SNMP v2 & v3 on the QNAP TS-251-4G, 8TB, SNMP, Telnet on the QNAP TS-451-4G, 8TB.

Number of storage drives supported
- TS-251-4G, 8TB:2
- TS-451-4G, 8TB:4
RAID levels
- TS-251-4G, 8TB:0, 1, JBOD
- TS-451-4G, 8TB:0, 1, 5, 6, 10, JBOD
Fan diameter
- TS-251-4G, 8TB:7 cm
- TS-451-4G, 8TB:12 cm
Management protocols
- TS-251-4G, 8TB:SNMP v2 & v3
- TS-451-4G, 8TB:SNMP, Telnet
Power supply unit (PSU) capacity
- TS-251-4G, 8TB:60 W
- TS-451-4G, 8TB:90 W
Width
- TS-251-4G, 8TB:102 mm
- TS-451-4G, 8TB:180 mm
Depth
- TS-251-4G, 8TB:225 mm
- TS-451-4G, 8TB:235 mm
Height
- TS-251-4G, 8TB:168.5 mm
- TS-451-4G, 8TB:177 mm

Side by side

Differences highlightedShow differences only

Comparison of TS-251-4G, 8TB, TS-451-4G, 8TB
73 specifications	A QNAP TS-251-4G, 8TB View product	B QNAP TS-451-4G, 8TB View product
Storage2 differ
Number of storage drives supportedDiffers	2	4
RAID levelsDiffers	0, 1, JBOD	0, 1, 5, 6, 10, JBOD
Design1 differ
Fan diameterDiffers	7 cm	12 cm
Performance2 differ
Management protocolsDiffers	SNMP v2 & v3	SNMP, Telnet
Security algorithmsDiffers	256-bit AES, FIPS 140-2, SSH, SSL/TLS	256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
Softwareidentical
Linux operating systems supportedKnown for one	Unknown — not stated by the source	Yes
Power1 differ
Power supply unit (PSU) capacityDiffers	60 W	90 W
Number of power supply unitsKnown for one	Unknown — not stated by the source	1
Power consumption (typical)Known for one	Unknown — not stated by the source	31.07 W
Power consumption (sleep)Known for one	Unknown — not stated by the source	0.55 W
Weight & dimensions5 differ
WidthDiffers	102 mm	180 mm
DepthDiffers	225 mm	235 mm
HeightDiffers	168.5 mm	177 mm
WeightDiffers	1.28 kg	3 kg
Package weightDiffers	2.32 kg	4.3 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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