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®

41specifications compared
11differ
30identical
3known for one product only

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

Side by side

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
Storage drives installed	No	No
Number of storage drives installed	0	0
Number of storage drives supportedDiffers	6	8
Supported storage drive types	HDD & SSD	HDD & SSD
Storage drive interface	Serial ATA II, Serial ATA III	Serial ATA II, Serial ATA III
Storage drive size	2.5/3.5"	2.5/3.5"
RAID support	Yes	Yes
Hot-swap drive bays	Yes	Yes
Processoridentical
Processor family	Intel® Celeron®	Intel® Celeron®
Processor frequency	2.41 GHz	2.41 GHz
Processor cores	2	2
Memoryidentical
Internal memory	4 GB	4 GB
Internal memory type	DDR3L	DDR3L
Maximum RAM supported	8 GB	8 GB
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
Wi-Fi	No	No
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
Ethernet LAN (RJ-45) ports	2	2
USB 2.0 ports quantityDiffers	3	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	2	3
HDMI ports quantity	1	1
Design1 differ
Chassis type	Tower	Tower
Cooling type	Active	Active
Product colour	Black	Black
Number of fansDiffers	1 fan(s)	2 fan(s)
Performanceidentical
Type	NAS	NAS
Device class	Home & Home Office	Home & Home Office
Softwareidentical
Operating system installed	QNAP Turbo System	QNAP Turbo System
Operating system version	4.1	4.1
Power2 differ
Power supply location	Built-in	Built-in
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
AC input voltage	100-240 V	100-240 V
AC input frequency	50 - 60 Hz	50 - 60 Hz
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
Operational conditionsidentical
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%

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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