The QNAP TS-451A-4G 4BAY 32TB IRONWOLF TS-451A-4G 4X 8TB ST8000VN0022 has 26 TB more total installed storage capacity than the QNAP TS-251+-2G NAS Tower Intel® Celeron® (32 TB vs 6 TB). The QNAP TS-451A-4G 4BAY 32TB IRONWOLF TS-451A-4G 4X 8TB ST8000VN0022 has 2 more storage drives installed than the QNAP TS-251+-2G NAS Tower Intel® Celeron® (4 vs 2). The QNAP TS-451A-4G 4BAY 32TB IRONWOLF TS-451A-4G 4X 8TB ST8000VN0022 has 2 more storage drives supported than the QNAP TS-251+-2G NAS Tower Intel® Celeron® (4 vs 2). Storage drive interface: Serial ATA II, Serial ATA III on the QNAP TS-251+-2G NAS Tower Intel® Celeron®, Serial ATA III on the QNAP TS-451A-4G 4BAY 32TB IRONWOLF TS-451A-4G 4X 8TB ST8000VN0022. Storage drive size: 3.5" on the QNAP TS-251+-2G NAS Tower Intel® Celeron®, 2.5/3.5" on the QNAP TS-451A-4G 4BAY 32TB IRONWOLF TS-451A-4G 4X 8TB ST8000VN0022.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers
2
3
Fiber ports quantity
0
0
HDMI ports quantity
1
1
Graphicsidentical
On-board graphics card DirectX versionKnown for one
—Unknown — not stated by the source
12.0
On-board graphics card base frequencyKnown for one
—Unknown — not stated by the source
320 MHz
On-board graphics card burst frequencyKnown for one
—Unknown — not stated by the source
600 MHz
Maximum on-board graphics card memoryKnown for one
—Unknown — not stated by the source
8 GB
Number of displays supported (on-board graphics)Known for one
—Unknown — not stated by the source
3
Design3 differ
Chassis type
Tower
Tower
Cooling type
Active
Active
Product colourDiffers
Grey
Green, White
Number of fans
1 fan(s)
1 fan(s)
Fan diameterDiffers
7 cm
12 cm
LED indicatorsDiffers
HDD, LAN, Power, Status, USB
Power, Ready, Reset
Cable lock slot
Yes
Yes
Cable lock slot type
Kensington
Kensington
Performanceidentical
Type
NAS
NAS
Device class
Home & Home Office
Home & Home Office
Backup function
Yes
Yes
Backup featuresKnown for one
—Unknown — not stated by the source
Cloud, iSCSI LUN
Multilingual support
Yes
Yes
Noise levelKnown for one
—Unknown — not stated by the source
18.3 dB
Card reader integratedKnown for one
—Unknown — not stated by the source
Yes
Compatible memory cardsKnown for one
—Unknown — not stated by the source
SD
Share folder access right managementKnown for one
—Unknown — not stated by the source
Yes
Web-based management
Yes
Yes
Access Control List (ACL)
Yes
Yes
Browser supportedKnown for one
—Unknown — not stated by the source
Microsoft Internet Explorer 10+ , Google Chrome, Apple Safari 7+, Mozilla Firefox
Built-in FTP server
Yes
Yes
Built-in UPnP AV media serverKnown for one
—Unknown — not stated by the source
Yes
Built-in iTunes server
Yes
Yes
Hot spareKnown for one
—Unknown — not stated by the source
Yes
On/off switch
Yes
Yes
Reset button
Yes
Yes
S.M.A.R.T. support
Yes
Yes
Security algorithmsKnown for one
—Unknown — not stated by the source
256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
Share folderKnown for one
—Unknown — not stated by the source
SMB/CIFS
System logKnown for one
—Unknown — not stated by the source
Yes
BuzzerKnown for one
Yes
—Unknown — not stated by the source
Software3 differ
Operating system installed
QNAP Turbo System
QNAP Turbo System
Operating system version
4.2
4.2
Windows operating systems supportedDiffers
Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Win
Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 Pro, Windows 10 Pro x64, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows
Linux operating systems supported
Yes
Yes
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
Yes
Server operating systems supportedDiffers
Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 R2 x64, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Mac compatibilityKnown for one
Yes
—Unknown — not stated by the source
Power2 differ
Power supply locationDiffers
External
Built-in
Power supply unit (PSU) capacityDiffers
60 W
96 W
Power consumption (typical)Known for one
—Unknown — not stated by the source
27 W
Power consumption (sleep)Known for one
—Unknown — not stated by the source
0.65 W
AC input voltage
100-240 V
100-240 V
Fan voltageKnown for one
12 V
—Unknown — not stated by the source
Weight & dimensions1 differ
WidthDiffers
102 mm
160 mm
Depth
225 mm
225 mm
Height
168.5 mm
168.5 mm
Packaging contentidentical
Cables included
AC, LAN (RJ-45)
AC, LAN (RJ-45)
Quick start guideKnown for one
—Unknown — not stated by the source
Yes
Number of screwsKnown for one
—Unknown — not stated by the source
28
External power adapterKnown for one
Yes
—Unknown — not stated by the source
Quick installation guideKnown for one
Yes
—Unknown — not stated by the source
Processor special featuresidentical
Embedded options availableKnown for one
—Unknown — not stated by the source
Yes
Enhanced Intel SpeedStep TechnologyKnown for one
—Unknown — not stated by the source
Yes
Execute Disable BitKnown for one
—Unknown — not stated by the source
Yes
Idle StatesKnown for one
—Unknown — not stated by the source
Yes
Intel 64Known for one
—Unknown — not stated by the source
Yes
Intel Clear Video TechnologyKnown for one
—Unknown — not stated by the source
Yes
Intel Enhanced Halt StateKnown for one
—Unknown — not stated by the source
Yes
Intel Identity Protection Technology versionKnown for one
—Unknown — not stated by the source
1.00
Intel Rapid Storage TechnologyKnown for one
—Unknown — not stated by the source
No
Intel Secure BootKnown for one
—Unknown — not stated by the source
Yes
Intel Secure Boot Technology versionKnown for one
—Unknown — not stated by the source
1.00
Intel Secure Key Technology versionKnown for one
—Unknown — not stated by the source
1.00
Intel Small Business Advantage (SBA) versionKnown for one
—Unknown — not stated by the source
0.00
Intel Smart Connect TechnologyKnown for one
—Unknown — not stated by the source
No
Intel Smart Connect Technology versionKnown for one
—Unknown — not stated by the source
0.00
Intel Smart Response Technology versionKnown for one
—Unknown — not stated by the source
0.00
Intel Stable Image Platform Program (SIPP)Known for one
—Unknown — not stated by the source
No
Intel Stable Image Platform Program (SIPP) versionKnown for one
—Unknown — not stated by the source
0.00
Intel Trusted Execution TechnologyKnown for one
—Unknown — not stated by the source
No
Intel VT-x with Extended Page Tables (EPT)Known for one
—Unknown — not stated by the source
Yes
Intel Virtualization Technology (VT-x)Known for one
—Unknown — not stated by the source
Yes
Intel Virtualization Technology for Directed I/O (VT-d)Known for one
—Unknown — not stated by the source
No
Intel® AES New Instructions (Intel® AES-NI)Known for one
—Unknown — not stated by the source
Yes
Intel® Anti-Theft Technology (Intel® AT)Known for one
—Unknown — not stated by the source
No
Intel® Clear Video HD Technology (Intel® CVT HD)Known for one
—Unknown — not stated by the source
Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)Known for one
—Unknown — not stated by the source
Yes
Intel® High Definition Audio (Intel® HD Audio)Known for one
—Unknown — not stated by the source
Yes
Intel® Hyper Threading Technology (Intel® HT Technology)Known for one
—Unknown — not stated by the source
No
Intel® Identity Protection Technology (Intel® IPT)Known for one
—Unknown — not stated by the source
Yes
Intel® InTru™ 3D TechnologyKnown for one
—Unknown — not stated by the source
No
Intel® Insider™Known for one
—Unknown — not stated by the source
No
Intel® OS GuardKnown for one
—Unknown — not stated by the source
No
Intel® Quick Sync Video TechnologyKnown for one
—Unknown — not stated by the source
Yes
Intel® Secure KeyKnown for one
—Unknown — not stated by the source
Yes
Intel® Small Business Advantage (Intel® SBA)Known for one
—Unknown — not stated by the source
No
Intel® Smart Response TechnologyKnown for one
—Unknown — not stated by the source
No
Intel® Turbo Boost TechnologyKnown for one
—Unknown — not stated by the source
No
Intel® Wireless Display (Intel® WiDi)Known for one
—Unknown — not stated by the source
Yes
Maximum number of PCI Express lanesKnown for one
—Unknown — not stated by the source
4
Number of execution unitsKnown for one
—Unknown — not stated by the source
12
Thermal Monitoring TechnologiesKnown for one
—Unknown — not stated by the source
Yes
UARTKnown for one
—Unknown — not stated by the source
Yes
Memory channels supported by processorKnown for one
—Unknown — not stated by the source
Dual
Memory types supported by processorKnown for one
—Unknown — not stated by the source
DDR3L-SDRAM
Operational conditionsidentical
Operating temperature (T-T)
0 - 40 °C
0 - 40 °C
Operating relative humidity (H-H)
5 - 95%
5 - 95%
Other featuresidentical
Processor ARK IDKnown for one
—Unknown — not stated by the source
91832
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.
