QNAP TS-X51+ Series TS-251+-2G (2GB RAM)

Part No: TS-251+-2G (2GB RAM)

2-Bay NAS, Intel Celeron Quad-Core 2.0GHz (up to 2.42GHz), 2GB DDR3L RAM (max 8GB), SATA 6Gb/s, 2 x GbE, hardware transcoding, HDMI out with kodi, remote control included, Virtualization Station, Surveillance Station (max 40 Ch), max 1 UX-800P/500P expansion unit

    The TS-251 provides a high performance & high capacity storage solution for SOHO & home, workgroup, and SMB users. Powered by the advanced QTS operating system, the TS-251 performs as an easy-to-use yet powerful NAS for data backup, file synchronization, remote access, home entertainment, and is ideal for users to build a personal cloud to access their data easily.

    • Transcode Full HD videos on-the-fly or offline*
    • Play 1080p videos with 7.1 channel surround sound pass-through via HDMI output
    • Create a personal cloud and stream your multimedia library via DLNA, AirPlay, and Plex
    • Centralize your file storage, sharing and backup
    • Run a virtual machine and extend the functionality of the NAS with an integrated virtualization solution
    • Expand the total raw storage capacity up to 60TB (with maximum 10 hard drives) with the economical QNAP expansion enclosure UX-800P

    Hardware Specifications

    Processor: Intel® Celeron® 2.41GHz dual-core processor (burst up to 2.58GHz)


    TS-251-4G: 4GB DDR3L RAM (2GB x 2)
    TS-251: 1GB DDR3L RAM
    Total memory slots: 2 (expandable up to 8GB)
    1. When installing two memory modules, please ensure that they are the same size and ideally use the same type of RAM for both memory slots.
    2. For the information of RAM module installation and compatible NAS models

    Flash Memory: 512MB DOM

    Hard Disk Drive: 
    2 x 3.5” SATA 6Gb/s, SATA 3Gb/s hard drive or SSD
    1. The system is shipped without HDD.
    2. For the HDD compatibility list

    Hard Disk Tray: 2 x Hot-swappable tray

    LAN Port: 2 x Gigabit RJ-45 Ethernet port

    LED Indicators: Status, LAN, USB, HDD 1, HDD 2


    2 x USB 3.0 port (Front: 1, Rear: 1)
    2 x USB 2.0 port (Rear: 2)
    Support USB printer, pen drive, and USB UPS etc.

    HDMI: 1

    IR Receiver: MCE-compatible

    Buttons: Power, reset

    Alarm buzzer: System warning

    Form factor: 2U, rack mountable


    168.5(H) x 102(W) x 225(D) mm
    6.63(H) x 4.02(W) x 8.86(D) inch


    Net: 1.28 kg (2.82 lbs)
    Gross: 2.32 kg (5.11 lbs)

    Power Consumption (W): 

    HDD standby: 10.28W
    S3 sleep: 0.47W
    In operation: 19.22W
    (with 2 x 1TB HDD installed)

    Temperature: 0-40˚C

    Humidity: 5~95% RH non-condensing, wet bulb: 27˚C

    Power Supply: External Power Adapter, 60W, 100-240V

    Secure Design: Kensington security slot for theft prevention

    Fan: 1 x quiet cooling fan (12V DC)