Comparison of QNAP TS-251+ and QNAP TS-231+

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-251+ (TS-251P) Remove	QNAP TS-231+ (TS-231P) Remove	Add a NAS to compare
Launch	2015	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
SSD support	yes	yes
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 SFTP WEBDAV	AFP CIFS/SMB FTP ISCSI NFS SFTP WEBDAV
P2P support	BitTorrent	BitTorrent
Media server	DLNA UPnP iTunes	DLNA iTunes
Cloud backup	Amazon S3 Box Dropbox Google Drive Microsoft OneDrive	Amazon S3
Connectivity
USB ports	2 x USB 2.0 2 x USB 3.0	3 x USB 3.0
eSATA ports	no	1 x eSATA
System
CPU	Intel Celeron J1900 quad-core @ 2 GHz	Annapurna AL212 dual-core @ 1.4 GHz
RAM	2 GB (upgradable)	1 GB DDR3
Flash	512 MB	512 MB
Operating system	QNAP QTS	QNAP QTS
Alternative OS
Power
Power supply	12 V / 5 A	12 V / 5 A
Consuption	18.09 W / 10.56 W	16.01 W / 9.03 W
Fans	1 x 70 mm	1 x 70 mm
Noise level	15.4 dB(A)	16.8 dB(A)
Features
Specials	Failover and link aggregation HDMI output Infrared receiver
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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