Intel Dual-Core Multimedia NAS with a PCIe Slot for Extending NAS Functionality
The PCIe port supports the installation of a 10GbE/5GbE/2.5GbE/ network expansion card, a QM2 card, a USB 3.2 Gen 2 (10Gbps) card, or a wireless network card.
Provide 4K media playback and online transcoding, while enabling 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 previously-recorded data.
QNAP provides a wide range of multimedia applications. You can manage all apps through the Multimedia Console to simplify management.
HBS backs up and synchronizes NAS data to other remote servers or cloud storage, while QuDedup deduplicates data at the source to reduce network bandwidth and storage space.
Use VJBOD (Virtual JBOD) to expand your storage capacity by using the unused storage of other QNAP NAS. Connect up to two TR series USB storage enclosure.
Intel® Celeron® J4025 Dual-Core Processor and AES-NI Hardware Encryption
Powered by Intel® Celeron® J4025 dual-core 2.0 GHz processor (burst up to 2.9 GHz), DDR4 RAM (up to 8 GB), one Gigabit LAN port, and supports SATA 6Gb/s hard drives, the TS-251D combines network expansion cards to create dependable read/write performance. The TS-251D features Intel® AES-NI 256 hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while securing sensitive data stored in the TS-251D.
Tested in QNAP Labs. Figures may vary by environment.
OS: QTS 4.4.1, Windows upload/download, MTU-9000
Volume type: RAID 0; 2 x Samsung 850 Pro 512GB; QNAP QXG-10G1T
Client PC: Intel® Core TM i7-6700 3.40GHz CPU; 32GB RAM; Intel X550 NIC with MTU-9000; Windows® 10 Pro
Smart AI Photo Management
QuMagie integrates QuMagie Core AI image recognition technology for facial recognition, subject identification, and geotagging photos. Similar photos are categorized into People, Places, and Things albums. Moreover, QuMagie features a built-in timeline scroll, customizable folder covers, iOS® Live Photo display and a powerful search tool, to provide you with the ultimate photo management and image sharing solution.
Real-Time 4K Video Transcoding
Featuring advanced Intel® UHD Graphics, the TS-251D supports dual-channel 4K hardware decoding and real-time transcoding, allowing you to convert videos to universal file formats that can be smoothly played across various devices*. You can also watch high-quality 4K media files on an HDTV using the HDMI output or with Plex® Media Server to stream media files to mobile devices and media streaming devices (including DLNA®, Roku®, Apple TV® (via Qmedia), Amazon Fire TV® and Chromecast™). The QNAP RM-IR004 remote control (sold separately) can be configured using QButton to customize individual button actions, providing a more user-friendly NAS experience.
*The TS-251D’s hardware provides hardware decoding, encoding, and transcoding capabilities. However, playback quality may vary due to playback software, file formats, system usage, and available bandwidth.
|CPU||Intel® Celeron® J4025/J4005 dual-core 2.0 GHz processor|
|CPU Architecture||64-bit x86|
|Graphic Processors||Intel® HD Graphics 600|
|Floating Point Unit|
|System Memory||4 GB SO-DIMM DDR4 (1 x 4 GB)|
|Maximum Memory||8 GB (2 x 4GB)|
|Memory Slot||2 x SO-DIMM DDR4
For dual-DIMM configuration, you must use a pair of identical DDR4 modules.
|Flash Memory||4GB (Dual boot OS protection)|
|Drive Bay||2 x 3.5-inch SATA 6Gb/s, 3Gb/s
The system is shipped without HDD.
For the HDD compatibility list, please visit https://www.qnap.com/compatibility/
|Drive Compatibility||3.5-inch SATA hard disk drives
2.5-inch SATA hard disk drives
2.5-inch SATA solid state drives
|M.2 SSD Slot||Optional via a QM2 PCIe adapter|
|SSD Cache Acceleration Support|
|Gigabit Ethernet Port (RJ45)||1
Expandable with an optional PCIe adapter
|5 Gigabit Ethernet Port (5G/2.5G/1G/100M)||Expandable with an optional PCIe adapter|
|10 Gigabit Ethernet Port||Expandable with an optional PCIe adapter|
|Wake on LAN (WOL)|
Slot 1: PCIe Gen 2 x4
PCIe bandwidth limitations will restrict the NAS 10GbE performance.
|USB 2.0 port||3|
|USB 3.2 Gen 1 port||2|
|USB 3.2 Gen 2 (10Gbps) Port||Optional via a PCIe expansion card|
|IR Sensor||(Optional QNAP RM-IR004 remote control)|
|HDMI Output||1, HDMI 2.0|
|LED Indicators||Power/Status, LAN, USB, HDD1-2|
|Buttons||Power, USB copy, Reset|
|Dimensions (HxWxD)||168 × 105 × 226 mm|
|Weight (Net)||1.48 kg|
|Weight (Gross)||2.58 kg|
|Operating temperature||0 – 40 °C (32°F – 104°F)|
|Storage Temperature||-20 – 70°C (-4°F – 158°F)|
|Relative Humidity||5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F)|
|Power Supply Unit||External Power Adapter, 65W, 100-240V|
|Power Consumption: HDD Sleep Mode||8.08 W|
|Power Consumption: Operating Mode, Typical||15.25 W
Tested with drives fully populated.
|Fan||1 x 70mm|
|Sound Level||16.7 db(A)|
|Kensington Security Slot|
|Max. Number of Concurrent Connections (CIFS) – with Max. Memory||1500|