Qnap TS-251D-2G | NAS server | 2x HDD, 2GB DDR4, Celeron J4025/J4005, 2.9/2.7GHz

CODE: TS-251D-2G / EAN: 4713213516669

Qnap TS-251D-2G | NAS server | 2x HDD, 2GB DDR4, Celeron J4025/J4005, 2.9/2.7GHz

CODE: TS-251D-2G / EAN: 4713213516669
255,05 EUR without VAT (net)
Out of stock
AC input frequency: 50 - 60
AC input voltage: 100 - 240
Access Control List (ACL): Yes
Backup features: Cloud, USB drive
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The TS-251D-2G server combines the functions of secure storage and a multimedia entertainment center in a single device. The TS-251D server is equipped with a PCIe slot that allows flexible expansion of NAS functionality and potential applications. Additional applications include QNAP's artificial intelligence-assisted QuMagie photo management application, which uses intelligent image recognition to group similar photos into "People," "Things" and "Places" albums. The TS-251D server is equipped with an HDMI port for streaming media throughout the home. The server supports dual-channel decoding and hardware transcoding, allowing media files from the NAS server to play smoothly on various devices.

PCIe expansion and HDMI input

The PCIe port can be used to install a 10GbE/5GbE/2.5GbE network expansion card, QM2 card, USB 3.2 Gen 2 (10Gbps) card or wireless network card. Share 4K media playback and transcoding online, allowing media to be viewed on different devices via HDMI output or streaming apps.

Dual-core processor

The TS-251D server features a 2.0GHz dual-core Intel® Celeron® J4025 processor (with acceleration to 2.9GHz), DDR4 RAM (max. 8GB) and one Gigabit LAN port, while support for SATA 6Gb/s hard drives and network expansion cards enables excellent read/write performance.

Real-time 4K video

Advanced Intel® UHD Graphics supports dual-channel 4K hardware decoding and real-time transcoding, allowing video content to be converted to universal file formats for seamless playback on a variety of devices*.

Applications to help you function properly

  • The media console consolidates all QTS multimedia applications into a single application.
  • The Cinema28 app allows you to manage media files using a single interface, streaming files to any device connected to your home network.
  • The Qmedia app allows you to easily stream music, photos and videos to Android TV™ devices


Features / filters
AC input frequency 50 - 60
AC input voltage 100 - 240
Access Control List (ACL) Yes
Backup features Cloud, USB drive
Backup function Yes
Bad block scan Yes
Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox
Built-in FTP server Yes
Buzzer Yes
Cable lock slot Yes
Cable lock slot type Kensington
Cables included AC, LAN (RJ-45)
Chassis type Tower
Conflict-Free processor Yes
Cooling type Active
CPU configuration (max) 1
Depth 226
Device class Home & Home Office
DHCP client Yes
DHCP server Yes
Disk roaming Yes
Embedded options available No
Enhanced Intel SpeedStep Technology Yes
Ethernet LAN Yes
Ethernet LAN (RJ-45) ports 1
Ethernet LAN data rates 1000
Execute Disable Bit Yes
External power adapter Yes
Fan diameter 7
Fan voltage 12
Flash memory 4000
Harmonized System (HS) code 84714100
HDMI ports quantity 1
HDMI version 2.0
Height 168
Hot spare Yes
Hot-swap drive bays Yes
Idle States Yes
Installed storage drive type No
Intel 64 Yes
Intel Enhanced Halt State Yes
Intel Identity Protection Technology version 1.00
Intel Secure Key Technology version 1.00
Intel Smart Response Technology version 0.00
Intel Virtualization Technology (VT-x) Yes
Intel Virtualization Technology for Directed I/O (VT-d) Yes
Intel VT-x with Extended Page Tables (EPT) Yes
Intel® AES New Instructions (Intel® AES-NI) Yes
Intel® Anti-Theft Technology (Intel® AT) No
Intel® Hyper Threading Technology (Intel® HT Technology) No
Intel® Identity Protection Technology (Intel® IPT) Yes
Intel® OS Guard Yes
Intel® Quick Sync Video Technology Yes
Intel® Secure Key Yes
Intel® Smart Response Technology No
Intel® Turbo Boost Technology No
Internal memory 2
Internal memory type DDR4
iSCSI support Yes
Jumbo frames support Yes
LED indicators HDD, LAN, Power, Status, USB
Link aggregation Yes
Linux operating systems supported Yes
Mac operating systems supported Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave, Mac OS X 10.15 Catalina, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Maximum internal memory supported by processor 8
Maximum number of PCI Express lanes 6
Maximum on-board graphics card memory 8
Maximum RAM supported 8
Memory form factor SO-DIMM
Memory slots 2
Memory types supported by processor DDR4-SDRAM,LPDDR4-SDRAM
Multilingual support Yes
Noise level 16.7
Number of displays supported (on-board graphics) 3
Number of execution units 12
Number of fans 1
Number of M.2 (M & B) slots 1
Number of power supply units 1
Number of screws 14
Number of storage drives supported 2
On-board graphics card base frequency 250
On-board graphics card burst frequency 700
On-board graphics card DirectX version 12.0
On-board graphics card dynamic frequency (max) 700
On-board graphics card ID 0x3185
On-board graphics card model Intel® UHD Graphics 600
On/off switch Yes
Online RAID expansion Yes
Online RAID migration Yes
Operating relative humidity (H-H) 5 - 95
Operating system installed QNAP QTS
Operating system version 5.0.0
Operating temperature (T-T) 0 - 40
Package weight 2.58
PCI Express configurations 1x2,1x2+2x1,1x4,2x1,4x1
PCI Express slots version 2.0
Power consumption (sleep) 8.08
Power consumption (typical) 15.25
Power supply location External
Power supply unit (PSU) capacity 65
255,05 EUR without VAT (net)
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