by Lyle Smith

QNAP TS-251D 2-Bay NAS Now Available

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

QNAP TS-251D

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