Product comparison · 2 nas & storage servers

QNAP TS-251, 4TB vs QNAP TS-451-4G, 16TB

Key differences

Differences highlightedShow differences only

Comparison of TS-251, 4TB, TS-451-4G, 16TB
73 specifications	A QNAP TS-251, 4TB View product	B QNAP TS-451-4G, 16TB View product
Storage3 differ
Total installed storage capacityDiffers	4 TB	16 TB
Number of storage drives supportedDiffers	2	4
RAID levelsDiffers	0, 1, JBOD	0, 1, 5, 6, 10, JBOD
Memory1 differ
Internal memoryDiffers	1 GB	4 GB
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.