Product comparison · 2 nas & storage servers

QNAP TS-651-4G NAS/storage server Tower Intel® Celeron® vs QNAP TS-851-4G NAS/storage server Tower Intel® Celeron®

Key differences

Number of storage drives supported
- TS-651-4G NAS/storage server Tower Intel® Celeron®:6
- TS-851-4G NAS/storage server Tower Intel® Celeron®:8
USB 2.0 ports quantity
- TS-651-4G NAS/storage server Tower Intel® Celeron®:3
- TS-851-4G NAS/storage server Tower Intel® Celeron®:2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
- TS-651-4G NAS/storage server Tower Intel® Celeron®:2
- TS-851-4G NAS/storage server Tower Intel® Celeron®:3
Number of fans
- TS-651-4G NAS/storage server Tower Intel® Celeron®:1 fan(s)
- TS-851-4G NAS/storage server Tower Intel® Celeron®:2 fan(s)
Power consumption (typical)
- TS-651-4G NAS/storage server Tower Intel® Celeron®:39.42 W
- TS-851-4G NAS/storage server Tower Intel® Celeron®:56.79 W
Power consumption (sleep)
- TS-651-4G NAS/storage server Tower Intel® Celeron®:0.41 W
- TS-851-4G NAS/storage server Tower Intel® Celeron®:0.72 W
Width
- TS-651-4G NAS/storage server Tower Intel® Celeron®:257 mm
- TS-851-4G NAS/storage server Tower Intel® Celeron®:298.2 mm
Depth
- TS-651-4G NAS/storage server Tower Intel® Celeron®:235 mm
- TS-851-4G NAS/storage server Tower Intel® Celeron®:235.4 mm

Differences highlightedShow differences only

Comparison of TS-651-4G, TS-851-4G
44 specifications	A QNAP TS-651-4G NAS/storage server Tower Intel® Celeron® Model TS-651-4G View product	B QNAP TS-851-4G NAS/storage server Tower Intel® Celeron® Model TS-851-4G View product
Storage1 differ
Number of storage drives supportedDiffers	6	8
Networkidentical
DHCP clientKnown for one	Yes	Unknown — not stated by the source
DHCP serverKnown for one	Yes	Unknown — not stated by the source
Ports & interfaces2 differ
USB 2.0 ports quantityDiffers	3	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	2	3
Design1 differ
Number of fansDiffers	1 fan(s)	2 fan(s)
Power2 differ
Number of power supply unitsKnown for one	1	Unknown — not stated by the source
Power consumption (typical)Differs	39.42 W	56.79 W
Power consumption (sleep)Differs	0.41 W	0.72 W
Weight & dimensions5 differ
WidthDiffers	257 mm	298.2 mm
DepthDiffers	235 mm	235.4 mm
HeightDiffers	175 mm	185.2 mm
WeightDiffers	6.18 kg	7.83 kg
Package weightDiffers	6.9 kg	8.9 kg

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.