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WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe with Heatsink for PS5 and Desktops

Model: WDBB9H0040BNC-WRSN
SKU: 6593301
$399.99
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Specifications
  • Storage Capacity
    4000 gigabytes
    Storage Drive Type
    SSD
    Maximum Read Speed
    7300 megabytes per second
    Maximum Write Speed
    6600 megabytes per second
    Form Factor
    M.2 2280
    Interface(s)
    PCIe Gen 4 x4
  • Key Specs
    • Storage Capacity: 4000 gigabytes (Measured in megabytes (MB), gigabytes (GB) and terabytes (TB), this is the amount available for storing files, music, movies, photos and more. The total includes the capacity of the hard disk drive and solid state drive if both are included on the computer.)
    • Storage Drive Type: SSD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
    • Maximum Read Speed: 7300 megabytes per second (The greatest speed at which the device can read information; for example, opening files.)
    • Maximum Write Speed: 6600 megabytes per second (The greatest speed at which the device can write information; for example, saving files.)
    • Form Factor: M.2 2280
    • Interface(s): PCIe Gen 4 x4 (Refers to the types of connections that devices use to interact and communicate with each other.)
  • General
    • Brand: WD
    • Model Number: WDBB9H0040BNC-WRSN
    • Product Name: BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe with Heatsink for PS5 and Desktops
  • Capacity
    • Storage Capacity: 4000 gigabytes (Measured in megabytes (MB), gigabytes (GB) and terabytes (TB), this is the amount available for storing files, music, movies, photos and more. The total includes the capacity of the hard disk drive and solid state drive if both are included on the computer.)
  • Performance
    • Storage Drive Type: SSD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
    • Maximum Read Speed: 7300 megabytes per second (The greatest speed at which the device can read information; for example, opening files.)
    • Maximum Write Speed: 6600 megabytes per second (The greatest speed at which the device can write information; for example, saving files.)
    • SSD Endurance: 2400 terabytes (The total amount of data that the solid-state drive (SSD) is able to write before it wears out, as specified by the manufacturer. Endurance is limited because the flash on a SSD has a finite number of cycles that it can complete.)
    • Heatsink: true (Dissipates heat during intense operation for sustained peak performance.)
  • Compatibility
    • Internal Or External: Internal
    • Product Compatibility: Desktop computers, PlayStation 5
    • Form Factor: M.2 2280
    • Interface(s): PCIe Gen 4 x4 (Refers to the types of connections that devices use to interact and communicate with each other.)
    • Operating System Compatibility: Windows
  • Features
    • Usage: Everyday computing, Gaming, Performance computing
  • Memory
    • NAND Flash Memory Type: 3D TLC (Single Level Cell (SLC) stores 1 bit of data per memory cell; Multi Level Cell (MLC) stores 2 bits per cell, Triple Level Cell (TLC) 3 bits, and Quad Level Cell (QLC) 4 bits. Vertical NAND (V-NAND) or 3D NAND stores more data by layering cells vertically. Similarly, there are 3D MLC, 3D TLC and 3D QLC stacked cells.)
  • Dimensions
    • Product Height: 0.41 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 0.96 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Weight: 1.1 ounces (The out of box weight of the item.)
  • Warranty
    • Warranty - Parts: 5 years
    • Warranty - Labor: 5 Years
  • Other
    • UPC: 619659209773

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 7,300MB/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 (ATM).
  • DirectStorage supported: Improve load times and get precious time back with Microsoft DirectStorage technology.
  • Gain the ultimate gaming edge: Insane speeds up to 7,300MB/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 (ATM).
  • DirectStorage supported: Improve load times and get precious time back with Microsoft DirectStorage technology.
Whats Included
  • BLACK SN850X 4TB Internal SSDPCIe Gen 4 x4 NVMe with Heatsink
  • Owner's manual
  • BLACK SN850X 4TB Internal SSDPCIe Gen 4 x4 NVMe with Heatsink
  • Owner's manual

Q: Does the SSD come with a warranty?

A: This SSD includes a five-year warranty for both parts and labor.

Q: What is the maximum write speed of the SSD?

A: The maximum write speed is 6600 megabytes per second.

Q: What is the storage capacity of the SSD?

A: The storage capacity of this SSD is 4000 gigabytes.

Q: What is the read speed of the SSD?

A: The maximum read speed is 7300 megabytes per second.

Q: Are there any software features included with the SSD?

A: The downloadable WD_BLACK Dashboard (Windows only) can automatically turn on Game Mode 2.0 features.

Q: What is the weight of the SSD?

A: The product weight is 1.1 ounces.

Q: Can the SSD be used in a PS5?

A: This SSD is compatible with desktop computers and PS5.

Q: Does it come with the screw to fasten into ps5?

A: Hi Bubba, As of February 2025, Western Digital has separated into two independent companies and the support process for your Western Digital and Sandisk branded products may have changed. All Hard Drive products remain with Western Digital, and all SSD and Flash products are now supported by Sandisk. We apologize for any confusion or inconvenience. For support of your SSD or Flash product, please contact the SanDisk support team on Social Media handle @sandisk

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Pros for WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe with Heatsink for PS5 and Desktops
There were no pros for this productSpeed, Storage, Performance, Installation, Ease of useStorage, Ease of use, Speed, Installation, PerformancePerformance, Speed, Storage Capacity
Cons for WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe with Heatsink for PS5 and Desktops
There were no cons for this productPrice, TemperatureHeat, Load TimesThere were no cons for this product

Specs

Reviews

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    Speedy and reliable. Works great with PS5.

    Fast and works as advertised. I purchased this as an expanded storage for my PlayStation 5 Pro. The preinstalled heatsink is a necessity when used on a PS5. PlayStation 5 read speeds reported at 6,600Mbps. A little less than advertised by likely due to the PS5 hardware interface limitations than the drive itself. This SSD comes with dram so it’s ideal for use with PlayStation. Other lower cost SSDs might not have the dram and relies on HBM (memory from the host machine) for caching, this is fine for PC and possibly for PlayStations in most use cases. Just note that the PlayStation 5 does not support HBM. I have had good experiences with Western Digital drives and this one is no difference. The drives are reliable and is speedy as advertised.

    Posted by Stickman

  • Rated 5 out of 5 stars

    Great product for PS5

    Works as intended with my PS5 Pro. No issues installing it and worked right away. Great buy and deal.

    Posted by GooberBooger84

  • Rated 5 out of 5 stars

    Great Product

    Purchased this product to extend the memory on my PlayStation 5. Was able to install and was recognized by my system immediately.

    Posted by Manuel

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