QNAP has released the TS-251D (TS-251D-4G and TS-251D-2G models), the company’s newest 2-bay consumer NAS. Featuring 4K media transcoding and streaming capabilities, the TS-251D is designed to give users an effective cross-device multimedia experience. The TS-251D is also highlighted by a PCIe slot, which adds expanded functionality.
QNAP has released the TS-251D (TS-251D-4G and TS-251D-2G models), the company’s newest 2-bay consumer NAS. Featuring 4K media transcoding and streaming capabilities, the TS-251D is designed to give users an effective cross-device multimedia experience. The TS-251D is also highlighted by a PCIe slot, which adds expanded functionality.
The new QNAP NAS is powered by an Intel Celeron J4005 dual-core 2.0GHz processor (with burst up to 2.7 GHz) and features up to 8GB of DDR4 RAM, a 1-Gigabit LAN port, and supports SATA 6Gbps drives. It also features Intel AES-NI 256 hardware-accelerated encryption and supports snapshots, the latter which allows for quick recovery of data due to accidental deletion/modification or ransomware attack. In addition, the TS-251D supports QuMagie, QNAP’s smart AI photo management application, which integrates AI image recognition to group similar photos together in albums.
With the extra PCIe slot, users can expand the functionality of the NAS, including a QNAP QXG – 10GbE/5GbE network expansion card for a high-speed network environment; a QM2 card for adding an M.2 SSD caching or 10GbE connectivity; a compatible wireless adapter; or a USB 3.1 Gen 2 (10Gbps) card.
QNAP’s App Center gives uses a range of different productivity tools, including the following QmailAgent, Notes Station 3, Qfiling, and Qsirch for quick file searches. The app center also features streaming applications, such as Cinema28, Qmedia, and Multimedia Console.
QNAP TS-251D-4G Specifications
| CPU | Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz) |
| CPU Architecture | 64-bit x86 |
| Graphic Processors | Intel® HD Graphics 600 |
| Floating Point Unit | Yes |
| Encryption Engine | (AES-NI) |
| Hardware-accelerated Transcoding | Yes |
| 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 |
| Drive Compatibility | 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid-state drives |
| Hot-swappable | Yes |
| M.2 SSD Slot | Optional via a QM2 PCIe adapter |
| SSD Cache Acceleration Support | Yes |
| Gigabit Ethernet Port (RJ45) |
Expandable with an optional PCIe adapter
|
| 5 Gigabit Ethernet Port | Expandable with an optional PCIe adapter |
| 10 Gigabit Ethernet Port | Expandable with an optional PCIe adapter |
| Jumbo Frame | |
| PCIe Slot | Slot 1: PCIe Gen 2 x4
PCIe bandwidth limitations will restrict the NAS 10GbE performance.
|
| USB 2.0 port | 3 |
| USB 3.0 port | 2 |
| USB 3.1 Gen 2 (10Gbps) Port | Optional via a PCIe expansion card |
| IR Sensor | (Optional QNAP RM-IR004 remote control) |
| HDMI Output | 1, HDMI 2.0 |
| Form Factor | Tower |
| LED Indicators | Power/Status, LAN, USB, HDD1-2 |
| Buttons | Power, USB copy, Reset |
| Dimensions (HxWxD) | 6.61 × 4.13 × 8.9 inch |
| Weight (Net) | 3.26 lbs |
| Weight (Gross) | 5.69 lbs |
| Operating temperature | 0 – 40 °C (32°F – 104°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 |
| Fan | 1 x 70mm |
| Sound Level | 16.7 db(A) |
| System Warning | Buzzer |
| Kensington Security Slot | Yes |
TS-251D-2G Specifications
| CPU | Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz) |
| CPU Architecture | 64-bit x86 |
| Graphic Processors | Intel® HD Graphics 600 |
| Floating Point Unit | Yes |
| Encryption Engine | (AES-NI) |
| Hardware-accelerated Transcoding | Yes |
| System Memory | 2 GB SO-DIMM DDR4 (1 x 2 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 |
| Hot-swappable | Yes |
| M.2 SSD Slot | Optional via a QM2 PCIe adapter |
| SSD Cache Acceleration Support | Yes |
| Gigabit Ethernet Port (RJ45) |
Expandable with an optional PCIe adapter
|
| 5 Gigabit Ethernet Port | Expandable with an optional PCIe adapter |
| 10 Gigabit Ethernet Port | Expandable with an optional PCIe adapter |
| Jumbo Frame | Yes |
| PCIe Slot | Slot 1: PCIe Gen 2 x4
PCIe bandwidth limitations will restrict the NAS 10GbE performance.
|
| USB 2.0 port | 3 |
| USB 3.0 port | 2 |
| USB 3.1 Gen 2 (10Gbps) Port | Optional via a PCIe expansion card |
| IR Sensor | (Optional QNAP RM-IR004 remote control) |
| HDMI Output | 1, HDMI 2.0 |
| Form Factor | Tower |
| LED Indicators | Power/Status, LAN, USB, HDD1-2 |
| Buttons | Power, USB copy, Reset |
| Dimensions (HxWxD) | 6.61 × 4.13 × 8.9 inch |
| Weight (Net) | 3.26 lbs |
| Weight (Gross) | 5.69 lbs |
| Operating temperature | 0 – 40 °C (32°F – 104°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 |
| Fan | 1 x 70mm |
| Sound Level | 16.7 db(A) |
| System Warning | Buzzer |
| Kensington Security Slot | Yes |
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