Product comparison · 2 nas & storage servers

NETGEAR ReadyNAS 3138 vs QNAP HS-251+ NAS/storage server Compact Intel® Celeron®

44specifications compared
25differ
19identical
77known for one product only

Key differences

Storage drives installed
- ReadyNAS 3138:Yes
- HS-251+ NAS/storage server Compact Intel® Celeron®:No
Total installed storage capacity
- ReadyNAS 3138:16 TB
- HS-251+ NAS/storage server Compact Intel® Celeron®:0 TB
Number of storage drives installed
- ReadyNAS 3138:4
- HS-251+ NAS/storage server Compact Intel® Celeron®:0
Number of storage drives supported
- ReadyNAS 3138:4
- HS-251+ NAS/storage server Compact Intel® Celeron®:2
Installed storage drive type
- ReadyNAS 3138:HDD
- HS-251+ NAS/storage server Compact Intel® Celeron®:No
Maximum supported storage capacity
- ReadyNAS 3138:32 TB
- HS-251+ NAS/storage server Compact Intel® Celeron®:12 TB
Processor family
- ReadyNAS 3138:Intel Atom®
- HS-251+ NAS/storage server Compact Intel® Celeron®:Intel® Celeron®
Processor frequency
- ReadyNAS 3138:2.4 GHz
- HS-251+ NAS/storage server Compact Intel® Celeron®:2 GHz

Side by side

Differences highlightedShow differences only

Comparison of ReadyNAS 3138, HS-251+
121 specifications	A NETGEAR ReadyNAS 3138 View product	B QNAP HS-251+ NAS/storage server Compact Intel® Celeron® Model HS-251+ View product
Storage7 differ
Storage drives installedDiffers	Yes	No
Total installed storage capacityDiffers	16 TB	0 TB
Number of storage drives installedDiffers	4	0
Number of storage drives supportedDiffers	4	2
Installed storage drive typeDiffers	HDD	No
Storage drive capacityKnown for one	4 TB	Unknown — not stated by the source
Storage drive interfaceDiffers	Serial ATA	Serial ATA, Serial ATA II, Serial ATA III
Maximum supported storage capacityDiffers	32 TB	12 TB
RAID supportKnown for one	Yes	Unknown — not stated by the source
RAID levelsKnown for one	0, 1, 5, 6, 10, JBOD	Unknown — not stated by the source
Processor2 differ
Processor manufacturerKnown for one	Intel	Unknown — not stated by the source
Processor familyDiffers	Intel Atom®	Intel® Celeron®
Processor modelKnown for one	C2558	Unknown — not stated by the source
Processor frequencyDiffers	2.4 GHz	2 GHz
Processor threadsKnown for one	4	Unknown — not stated by the source
Processor cacheKnown for one	2 MB	Unknown — not stated by the source
ECC supported by processorKnown for one	Yes	Unknown — not stated by the source
PCI Express slots versionKnown for one	2.0	Unknown — not stated by the source
Physical Address Extension (PAE)Known for one	36 bit	Unknown — not stated by the source
Processor cache typeKnown for one	L3	Unknown — not stated by the source
Processor codeKnown for one	SR1CZ	Unknown — not stated by the source
Processor lithographyKnown for one	22 nm	Unknown — not stated by the source
Processor operating modesKnown for one	32-bit, 64-bit	Unknown — not stated by the source
Processor package sizeKnown for one	34 x 28 mm	Unknown — not stated by the source
Processor socketKnown for one	BGA 1283	Unknown — not stated by the source
SteppingKnown for one	B0	Unknown — not stated by the source
Thermal Design Power (TDP)Known for one	15 W	Unknown — not stated by the source
Maximum internal memory supported by processorKnown for one	64 GB	Unknown — not stated by the source
Conflict-Free processorKnown for one	No	Unknown — not stated by the source
Memory2 differ
Internal memoryDiffers	4 GB	2 GB
Memory form factorKnown for one	UDIMM	Unknown — not stated by the source
Flash memoryDiffers	128 MB	512 MB
Internal memory typeKnown for one	Unknown — not stated by the source	DDR3L
Networkidentical
Jumbo frames supportKnown for one	Yes	Unknown — not stated by the source
Supported network protocolsKnown for one	TCP/IP, IPv4, IPv6, NTP	Unknown — not stated by the source
DHCP serverKnown for one	Unknown — not stated by the source	Yes
Ports & interfaces2 differ
Ethernet LAN (RJ-45) portsDiffers	4	2
USB 2.0 ports quantityDiffers	1	2
eSATA ports quantityKnown for one	2	Unknown — not stated by the source
HDMI ports quantityKnown for one	Unknown — not stated by the source	1
Design4 differ
Chassis typeDiffers	Rack (1U)	Compact
Cooling typeDiffers	Active	Passive
Product colourDiffers	Black, Grey	Black
Number of fansKnown for one	3 fan(s)	Unknown — not stated by the source
Fan diameterKnown for one	4 cm	Unknown — not stated by the source
LED indicatorsDiffers	Activity, HDD, LAN, Power	LAN, Status
Cable lock slotKnown for one	Unknown — not stated by the source	Yes
Cable lock slot typeKnown for one	Unknown — not stated by the source	Kensington
Performanceidentical
Backup functionKnown for one	Yes	Unknown — not stated by the source
Number of usersKnown for one	8192 user(s)	Unknown — not stated by the source
Noise levelKnown for one	28 dB	Unknown — not stated by the source
Management protocolsKnown for one	SNMP v2, v3	Unknown — not stated by the source
Access Control List (ACL)Known for one	Yes	Unknown — not stated by the source
S.M.A.R.T. supportKnown for one	Yes	Unknown — not stated by the source
Security algorithmsKnown for one	256-bit AES	Unknown — not stated by the source
Device classKnown for one	Unknown — not stated by the source	Home & Home Office
BuzzerKnown for one	Unknown — not stated by the source	Yes
Multilingual supportKnown for one	Unknown — not stated by the source	Yes
Built-in FTP serverKnown for one	Unknown — not stated by the source	Yes
On/off switchKnown for one	Unknown — not stated by the source	Yes
Reset buttonKnown for one	Unknown — not stated by the source	Yes
Software2 differ
Operating system installedKnown for one	ReadyNAS OS	Unknown — not stated by the source
Operating system versionKnown for one	6.4	Unknown — not stated by the source
Mac operating systems supportedDiffers	Mac OS X 10.0 Cheetah, Mac OS X 10.1 Puma, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks	Mac OS X 10.0 Cheetah, Mac OS X 10.1 Puma, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.9 Mavericks
Server operating systems supportedDiffers	Windows Server 2008 R2, Windows Server 2012	Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Other operating systems supportedKnown for one	Android, iOS	Unknown — not stated by the source
Power2 differ
Power supply locationDiffers	Built-in	External
Power supply unit (PSU) capacityDiffers	180 W	60 W
Number of power supply unitsKnown for one	1	Unknown — not stated by the source
Power consumption (typical)Known for one	55 W	Unknown — not stated by the source
Power consumption (off)Known for one	0.3 W	Unknown — not stated by the source
AC input frequencyKnown for one	50 - 60 Hz	Unknown — not stated by the source
Power consumption (sleep)Known for one	Unknown — not stated by the source	0.6 W
Weight & dimensions4 differ
WidthDiffers	486 mm	302 mm
DepthDiffers	406 mm	220 mm
HeightDiffers	44 mm	41.3 mm
WeightDiffers	5.21 kg	1.56 kg
Package weightKnown for one	Unknown — not stated by the source	2.62 kg
Processor special featuresidentical
Embedded options availableKnown for one	Yes	Unknown — not stated by the source
Execute Disable BitKnown for one	Yes	Unknown — not stated by the source
Graphics & IMC lithographyKnown for one	22 nm	Unknown — not stated by the source
Intel 64Known for one	Yes	Unknown — not stated by the source
Intel QuickAssist TechnologyKnown for one	Yes	Unknown — not stated by the source
Intel VT-x with Extended Page Tables (EPT)Known for one	Yes	Unknown — not stated by the source
Intel Virtualization Technology (VT-x)Known for one	Yes	Unknown — not stated by the source
Intel® AES New Instructions (Intel® AES-NI)Known for one	Yes	Unknown — not stated by the source
Intel® Hyper Threading Technology (Intel® HT Technology)Known for one	No	Unknown — not stated by the source
Intel® Turbo Boost TechnologyKnown for one	No	Unknown — not stated by the source
Maximum number of PCI Express lanesKnown for one	16	Unknown — not stated by the source
Physical Address Extension (PAE)Known for one	Yes	Unknown — not stated by the source
UARTKnown for one	Yes	Unknown — not stated by the source
Memory channels supported by processorKnown for one	Dual	Unknown — not stated by the source
Memory types supported by processorKnown for one	DDR3-SDRAM, DDR3L-SDRAM	Unknown — not stated by the source
Operational conditionsidentical
Operating relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Other featuresidentical
Compliance certificatesKnown for one	RoHS	Unknown — not stated by the source
CertificationKnown for one	FCC Cl.B, CE Cl.B, VCCI Cl.B	Unknown — not stated by the source
Processor ARK IDKnown for one	77983	Unknown — not stated by the source
Packaging contentidentical
External power adapterKnown for one	Unknown — not stated by the source	Yes
Cables includedKnown for one	Unknown — not stated by the source	AC, LAN (RJ-45)
Quick installation guideKnown for one	Unknown — not stated by the source	Yes
Number of screwsKnown for one	Unknown — not stated by the source	14
Package typeKnown for one	Unknown — not stated by the source	Box

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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