WD_BLACK 4TB SN850X NVMe Internal Gaming Solid State Drive with Heatsink - Works with PlayStation 5, Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2XHE
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FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Saturday, Nov 22
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Capacity: 4TB
Style: SSD w/ Heatsink
Features
- TRANSFORM YOUR PC. Get top-tier performance and ridiculously short load times for your gaming PC or workstation with insane speeds up to 7,300 MB/s (2)
- MORE ROOM, MORE GAMES. Capacities up to 8TB (1) built with Western Digital TLC 3D NAND, means you get to download more games and stop deleting your favorites.
- HEATSINK FOR THE WIN. All capacities have an optional heatsink version to help maintain peak performance through your most intense gaming sessions.
- DO MORE WITH DASHBOARD. The downloadable WD_BLACK Dashboard (Windows only) monitors your drives health, lets you customize your RGB lighting (heatsink versions only), and can automatically detect games to turn on Game Mode 2.0.
- FUTURE-FORWARD FEATURES. The WD_BLACK SN850X boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management (ATM).
Description
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(1), this gaming drive is built for top-tier performance. With 7,300MB/s(2) 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.
Digital Storage Capacity: 4 TB
Hard Disk Interface: NVMe
Connectivity Technology: NVMe
Brand: WD_BLACK
Special Feature: Heatsink
Hard Disk Form Factor: 2280 Centimeters
Hard Disk Description: Solid State Drive
Compatible Devices: Laptop, Motherboards, PS5
Installation Type: Internal Hard Drive
Color: Black
Hard Drive: 4 TB Solid State Drive
Brand: WD_BLACK
Series: SN850X
Item model number: WDS400T2XHE
Hardware Platform: PC
Item Weight: 0.303 ounces
Product Dimensions: 3.16 x 0.93 x 0.35 inches
Item Dimensions LxWxH: 3.16 x 0.93 x 0.35 inches
Color: Black
Flash Memory Size: 4 TB
Hard Drive Interface: NVMe
Manufacturer: Western Digital Technologies, Inc.
Date First Available: August 5, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Capacity: 2TB
Style: SSD w/ Heatsink
Upgraded to the WD_BLACK 2TB SN850X NVMe from a Gen 3 SSD, and the difference is massive. This drive delivers exactly what it promises — insane speeds, great thermal performance, and rock-solid reliability. Speed & Performance: Right out of the box, I was getting read/write speeds over 7,000 MB/s, matching advertised specs. Game load times are almost instant, and large file transfers (like 4K video or game installs) finish in seconds. Perfect for my gaming rig and content creation workflow. Gaming Benefits: Games launch faster, textures stream without stutter, and overall system responsiveness is noticeably smoother. If you’re using Windows 11 with DirectStorage support, this drive is built to take advantage of it. Thermals: I bought the version with the heatsink, and it’s doing a great job keeping temps in check. Even under sustained load, it stays cool and doesn’t throttle. If you’re using this in a cramped case or PS5, definitely get the heatsink version. Installation: Easy to install in my ATX motherboard. Plug it in, screw it down, format in Disk Management, and you’re good to go. Final Thoughts: ✅ Fast, future-proof PCIe Gen 4 performance ✅ Great for gaming, productivity, and OS drive ✅ Reliable WD quality ✅ Excellent price-to-performance ratio If you’re looking for a top-tier Gen 4 NVMe SSD, the SN850X is an absolute no-brainer. Would buy again in a heartbeat.
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Reviewed in the United States on September 22, 2025 by Kayla Mom Kayla Mom
Capacity: 4TB
Style: SSD
I’ve been using this drive for a few months, and it’s easily one of the fastest and most stable Gen4 SSDs I’ve tested. Benchmarks reached 7,133 MB/s read and 4,169 MB/s write in performance mode — right in line with WD’s specs. Even under load, it maintained around 6,500 MB/s read and 3,600 MB/s write, showing great consistency. For testing purposes, I also ran a power-saving “stress” scenario that intentionally limited performance to simulate extreme throttling. Those results were only for analysis — customers will never experience that kind of slowdown in normal use. Thermals stay solid with a basic heatsink (mid-50 °C), and there’s no throttling during long transfers. The WD Dashboard software is easy to use and adds an optional Gaming Mode for max speed. ⚖️ Pros: - Reaches full Gen4 performance (7,000+ MB/s reads) - Excellent sustained write speed and thermal stability - Rock-solid reliability for OS, games, or content creation - Intuitive WD Dashboard software ⚠️ Cons: - Can run warm without heatsink - Requires a PCIe Gen4 slot and good airflow for full speed 🏁 Final Thoughts: The WD_BLACK SN850X is a premium SSD that lives up to its reputation. Under the right conditions, it delivers near-theoretical Gen4 speeds and flawless stability. Even in multitasking or gaming scenarios, performance stays consistent and responsive. The “low” benchmark results included here were testing artifacts—stress conditions designed to show how power management affects throughput, not what normal users should expect. In everyday use, this drive is exceptionally fast, reliable, and built to last. ✅ Verdict: A flagship-level NVMe SSD that rewards systems tuned for performance. Highly recommended for gamers, developers, and creators who want speed with zero compromise.
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Reviewed in the United States on October 18, 2025 by R. Ortiz R. Ortiz
Capacity: 2TB
Style: SSD w/ Heatsink
This Fast and Reliable Gaming SSD my first WD SSD and I'm impressed. The WD 850X is fast and reliable for gaming, with quick load times and stable temperatures. Easy to install. Highly recommended for gamers.
Reviewed in the United States on September 4, 2025 by sevenmne
Capacity: 4TB
Style: SSD w/ Heatsink
Incredibly fast, easy to install, the optional heatsink keeps the SSD at a comfortable temperature, and it worked immediately. The price is unfortunately a bit high however I still think it's worth having a 4TB SSD for a primary PC drive.
Reviewed in the United States on November 2, 2025 by Nicholas Miller
Capacity: 2TB
Style: SSD w/ Heatsink
Easy to Install, Fast, and Reliable. The SN850X is just a great all-around drive, I've been using it as my OS and Primary Gaming Drive for several months at this point, and it's been awesome. My PC boots up in seconds, a great improvement from my old OS drive. Pair that with solid temperature control and large storage capacity, and you've got this absolutely solid drive. I have no complaints about this SSD; I totally recommend it. (Especially for Gaming)
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Reviewed in the United States on October 13, 2025 by Aiden Murphy
Capacity: 2TB
Style: SSD w/ Heatsink
A must-have upgrade for any PS5 owner! Super easy to install, and the system recognized it right away. The performance is excellent — fast load times and plenty of space for all my games. The built-in heatsink keeps it running cool. Definitely worth it if you’re running out of storage on your PS5!
Reviewed in the United States on October 21, 2025 by Shawn Thomas
Capacity: 8TB
Style: SSD
I bought the WD_BLACK 8TB SN850X NVMe SSD to use with the UGREEN 80Gbps M.2 NVMe SSD Enclosure and connected it to my M4 Max Mac Studio. At first, I noticed fast transfer speeds, but after transferring a few large files, the speed dropped significantly. Unplugging and reconnecting the enclosure temporarily fixed it, but the issue kept happening. I suspected the problem was the UGREEN enclosure since Western Digital drives have always been reliable for me. I returned the UGREEN and replaced it with the OWC Express 1M2 80Gb/s Enclosure. Transfer speeds were excellent, but the drive started disconnecting a couple of minutes after startup. The included USB-C cable was also too short. I replaced it with the OWC 0.8M Thunderbolt 5 (USB-C) Cable, and that completely solved the disconnection issue. Now everything works flawlessly, with consistent speeds of around 5800 MB/s write and 5600 MB/s read, and the enclosure stays cool during long transfers. It took some troubleshooting, but I’m very satisfied with the final setup.
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Reviewed in the United States on October 31, 2025 by Fabricio
Capacity: 1TB
Style: SSD w/ Heatsink
The performance of this ssd is really nice, the speed is everything, got the 1tb & i got alot of space now i can have up to 10 games downloaded on my ps5
Reviewed in the United States on September 29, 2025 by Kadejah Morrison Kadejah Morrison