Comparison of QNAP TS-251A and QNAP TS-251+
The side-by-side comparison of the devices’ specifications. The comparison table below makes it easier to choose the most fitting NAS.
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| Adding/changing a NAS | |||
 QNAP TS-251A (TS-251A) |
 QNAP TS-251+ (TS-251P) |
 Add a NAS to compare
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| Launch | 2016 | 2015 | |
| Class | Small office / Home office | Small office / Home office | |
| Body | |||
| Dimensions | 169 x 102 x 219 mm | 169 x 102 x 219 mm | |
| Weight | 1.28 kg | 1.28 kg | |
| Disks | |||
| Disk bays | 2 x 3.5" SATA III | 2 x 3.5" SATA III | |
| RAID | JBOD RAID0 RAID1 |
JBOD RAID0 RAID1 |
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| SSD support | yes | yes | |
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| Network | |||
| LAN ports | 2 x Gigabit Ethernet | 2 x Gigabit Ethernet | |
| Wireless | yes, with USB dongle | yes, with USB dongle | |
| Protocols | AFP CIFS/SMB FTP ISCSI NFS SFTP WEBDAV |
AFP CIFS/SMB FTP ISCSI SFTP WEBDAV |
|
| P2P support | BitTorrent | BitTorrent | |
| Media server | DLNA UPnP iTunes |
DLNA UPnP iTunes |
|
| Cloud backup | Amazon S3 Box Dropbox Google Drive Microsoft OneDrive |
Amazon S3 Box Dropbox Google Drive Microsoft OneDrive |
|
| Connectivity | |||
| USB ports | 3 x USB 3.0 | 2 x USB 2.0 2 x USB 3.0 |
|
| eSATA ports | no | no | |
| System | |||
| CPU | Intel Celeron N3060 dual-core @ 1.6 GHz | Intel Celeron J1900 quad-core @ 2 GHz | |
| RAM | 2 GB (upgradable) | 2 GB (upgradable) | |
| Flash | 4 GB | 512 MB | |
| Operating system | QNAP QTS | QNAP QTS | |
| Alternative OS | |||
| Power | |||
| Power supply | 12 V / 5.4 A | 12 V / 5 A | |
| Consuption | 16.2 W / 7.9 W | 18.09 W / 10.56 W | |
| Fans | 1 x 70 mm | 1 x 70 mm | |
| Noise level | 18.3 dB(A) | 15.4 dB(A) | |
| Features | |||
| Specials | Failover and link aggregation HDMI output Infrared receiver Audio input Audio output |
Failover and link aggregation HDMI output Infrared receiver |
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| Administration | |||
| Default IP | DHCP | DHCP | |
| Default username | admin | admin | |
| Default password | admin | admin | |
A maximum of 3 devices can be compared at the same time. To add or change a NAS, type the name of the NAS you’re looking for in the search field of the table’s column, then click on the device’s name in the drop-down list of search results.
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