First home/SOHO Intel dual-core NAS with a PCIe slot for extending NAS functionality
The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP’s first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications. You can install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the QNAP QWA-AC2600) to turn the TS-251B into a wireless access point and to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding and transcoding, allowing you to enjoy watching NAS media files smoothly across various devices.
The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.
4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications.
Snapshots fully record the system status and data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data.
Hybrid Backup Sync consolidates backup and sync tasks into a single app, providing multiple layers of data protection.
Remotely access the apps and files on your TS-251B via myQNAPcloud and easily manage and share files.
Supports containerized applications and hosting virtual machines with various operating systems.
Intel® Celeron® J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz) with 2GB RAM (1 x 2GB)
Intel® Celeron® J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz) with 4GB RAM (1 x 4GB)
|CPU||Intel® Celeron® J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz)
Architecture: 64-bit x86
|Graphics||Intel® HD Graphics 500|
|System Memory||2 GB DDR3L (1 x 2 GB) (TS-251B-2G)
4 GB DDR3L (1 x 4 GB) (TS-251B-4G)
|Maximum Memory||8 GB (2 x 4 GB)|
|Memory Slot||2 x SODIMM DDR3L up to 1866, with dual-channel support|
|Flash Memory||4GB eMMC|
|Drive Bay||2 x 3.5″ SATA 6 Gbps HDD|
|Drive Compatibility||• 3.5″ SATA 6Gb/s HDD
• 2.5″ SATA 6Gb/s HDD
• 2.5″ SATA 6Gb/s SSD
|SSD Cache Acceleration Support||3.5″ drive bay：1 to 2|
|Gigabit Ethernet Port||1 x RJ45|
|USB Port||2 x USB 3.0, 3 x USB 2.0|
|USB One Touch Copy||Front：USB 3.0 Type-A|
|PCIe Slot||1 PCIe 2.0 x2 slot|
|HDMI Output||1 x HDMI v1.4b (up to 3840 x 2160 resolution at 30 Hz)|
|IR sensor||, supporting QNAP RM-IR004 remote control (optional purchase)|
|Audio||1 x speaker, 2 x MIC Input
1 x 3.5 mm line-out jack
Note: You cannot use the speakers and the line-out jack simultaneously.
|LED Indicators||Status/power、LAN、USB、HDD 1 – 2|
|Buttons||Power, Reset, USB One-touch-copy|
|System Warning||Alarm buzzer and voice prompts|
|Dimensions (H x W x D)||168 x 105 x 226 mm ( 6.61 x 4.13 x 8.90 inch)|
|Net Weight||1.53 kg (3.37 lbs)|
|Power Consumption (W)||HDD standby：8.08 W
In operation：15.25 W
(with 2 x 1TB HDDs installed)
|Sound Level||Sound pressure (LpAm): 17.3 dB(A)|
|Power Supply Unit||65W AC adapter, 100-240V|
|Fan||1 x 7 cm|
|Operating Temperature & Relative Humidity||0 ~ 40˚C ( 32˚F ~ 104˚F ), 5 ~ 95% RH non-condensing, wet bulb: 27˚C (80.6˚F)|
|Other Interfaces||Kensington security slot|