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About this item

• Get the ultimate gaming edge over your competition with insane speeds up to 7,300 MB/s2 for top-level performance and ridiculously short load times.
• Soup up your gaming experience with extremely low latency that loads graphics fast with minimal stutter and lagging for smooth, satisfying action.
• A range of capacities from 1TB to 4TB1 means you get to keep more of today’s games that can take up 200GB1 or more of storage.
• Game Mode 2.0 serves up even more PC performance-boosting features like load prediction to ready game assets for fast in-game loading.
• Output approaching the limits of the PCIe Gen43 interface helps you get ultra-fast performance out of your storage and system components.

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  From the manufacturer

  

  
  

  

  Effortless power. Elevated play.

  Crush load times and slash throttling, lagging, and texture pop-ins with the WD_BLACK SN850X NVMe SSD. This gaming drive is built for top-tier performance, with advanced features like 7,300MB/s(2) speeds (8TB models), a heatsink option to maintain performance, and the downloadable WD_BLACK Dashboard (Windows only), which automatically turns on Game Mode 2.0. The WD_BLACK SN850X delivers a smooth, fast experience — and innovative features that let you compete at your absolute peak.

  At a Glance

  • Insane speeds up to 7,300 MB/s(2), (8TB models)
  • Minimized latency loads graphic fast
  • Capacities from 1TB to 8TB(3)
  • Game Mode 2.0 delivers PC performance-boosting features
  • Near-max PCIe Gen4(1) speeds
  • From WD_BLACK, a trusted brand in gaming

  
  

  

  Gain the ultimate gaming edge

  Insane speeds up to 7,300MB/s(2) (8TB models) deliver top-tier performance with ridiculously short load times — for the elite gaming experience you’ve been waiting for.

  

  DirectStorage supported

  Improve load times and get precious time back with Microsoft DirectStorage technology.

  

  More room for more games

  Capacities up to 8TB(3) built with Western Digital TLC 3D NAND, means you get to keep more games at the ready — and get into the action even faster.

  
  

  

  Do more with WD_BLACK Dashboard

  The downloadable WD_BLACK Dashboard (Windows only) monitors your drive’s health, lets you customize your RGB lighting, and, exclusively on the SN850X SSD, enables Game Mode 2.0 to transform your gaming experience.

  

  Future-forward features

  The WD_BLACK SN850X SSD boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management(4).

  

  Heatsink for the win

  All capacities have an optional heatsink version that's not only eye-catching, but also helps your rig maintain peak performance through your most intense gaming sessions.

  
  

  
  

  1. PCIe Gen4 storage technology requires a compatible motherboard. WD_BLACK SN850X NVMe SSD is backwards-compatible with PCIe Gen3.

  2. Based on read speed, unless otherwise stated. 1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity and other factors.

  3. 1GB = 1 billion bytes. 1TB = one trillion bytes. Actual user capacity may be less depending on operating environment.

  4. Requires the downloadable WD_BLACK Dashboard (Windows only)

  Western Digital, the Western Digital design, the Western Digital logo, WD_BLACK, and the WD_BLACK logo are registered trademarks or trademarks of Western Digital Corporation or its affiliates in the US and/or other countries. The NVMe word mark is a trademarks of NVM Express, Inc. PCIe is a registered trademarks of PCI-SIG. Windows and Microsoft are registered trademarks or trademarks of the Microsoft group of companies. All other marks are the property of their respective owners. Product specifications subject to change without notice. Pictures shown may vary from actual products.

  2025 Western Digital Corporation or its affiliates. All rights reserved.

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  Product information

  Technical Details

  Brand	‎SanDisk
  Manufacturer	‎Western Digital (UK) Ltd, Western Digital (UK) Ltd, 388 Jiang Chuan East Road, Minhang District, Shanghai, China 200241
  Series	‎WD Black SN850X
  Colour	‎Black
  Form Factor	‎2.5-inch
  Item Height	‎2.38 Millimeters
  Item Width	‎22 Millimeters
  Product Dimensions	‎8 x 2.2 x 0.24 cm; 7.5 g
  Batteries	‎1 Lithium Ion batteries required.
  Item model number	‎WDS400T2X0E
  Hard Drive Size	‎4 TB
  Hard Disk Description	‎Solid State Drive
  Hard Drive Interface	‎Solid State
  Voltage	‎1 Volts
  Hardware Platform	‎PC
  Operating System	‎windows
  Are Batteries Included	‎No
  Lithium Battery Weight	‎0.19 Grams
  Number of Lithium Ion Cells	‎1
  Number of Lithium Metal Cells	‎1
  Included Components	‎WD Black SN850X Internal SSD
  Manufacturer	‎Western Digital (UK) Ltd
  Country of Origin	‎China
  Item Weight	‎7.5 g