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WD Black SN850X 4TB M.2 2280 PCIe Internal Solid State Drive WDS400T2X0E

WD Black SN850X 4TB M.2 2280 PCIe Internal Solid State Drive WDS400T2X0E
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General Information

Built for elite gaming.

Crush load times and slash throttling, lagging, and texture pop-ins with the WD_BLACK SN850X NVMe™ SSD. Available in capacities of 1TB up to 8TB, this gaming drive is built for top-tier performance. With 7,300MB/s speeds (1TB - 4TB models) and a heatsink option to maintain performance, you can enjoy your favorite games without worrying about lag. Plus, the downloadable WD_BLACK Dashboard (Windows® only) can automatically turn on Game Mode 2.0 features. The WD_BLACK SN850X NVMe™ SSD delivers a smooth, fast experience -and the innovations that let you compete at your absolute peak.

Gain the Ultimate Gaming Edge

Insane speeds up to 7,300 MB/s (1TB - 4TB models) deliver top-tier performance with ridiculously short load times - for the elite gaming experience you've been waiting for.

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.

More Room for More Games

Capacities up to 8TB 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

DirectStorage Supported

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

Technical Information
Storage Capacity:4 TB
Platform Supported:PC

Drive Performance
Random 4KB Read:1200000IOPS
Random 4KB Write:1100000IOPS
Endurance (TBW):2400 TB
Maximum Sequential Read:7.13 GB/s
Maximum Sequential Write:6.45 GB/s

Interfaces/Ports
Drive Interface:PCI Express NVMe
Drive Interface Standard:PCI Express NVMe 4.0 x4

Physical Characteristics
Drive Type:Internal
Form Factor:M.2 2280
Height:0.1"
Width:0.9"
Length:3.1"
Weight (Approximate):0.26 oz

Miscellaneous
Operating System Compatibility:Windows 10+
Compatibility:

Sony PlayStation 5

Device Supported:Gaming PC
Device Supported:PlayStation
Device Supported:Workstation
Device Supported:Computer

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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Shipping Restrictions
  • This item cannot be shipped to PO Boxes.
  • This item can be shipped only within the U.S.


  • UPC: 718037891378 
  • Mfr's Part #: WDS400T2X0E-00BCA0