

🚀 Elevate your rig with speed and space that keep you ahead of the game!
The WD_BLACK SN850X 4TB NVMe SSD is a high-performance M.2 2280 solid-state drive designed for gamers and professionals seeking ultra-fast PCIe Gen4 speeds up to 7,300 MB/s read and 6,300 MB/s write. Featuring large 4TB capacity with SanDisk TLC 3D NAND, optional heatsink for thermal control, and advanced features like Game Mode 2.0 and Adaptive Thermal Management via the WD_BLACK Dashboard, it delivers reliable, lag-free performance for demanding workloads and gaming sessions.











| ASIN | B0B7CQ2CHH |
| Batteries | 1 Lithium Ion batteries required. |
| Best Sellers Rank | #14 in Internal Solid State Drives |
| Brand | Sandisk |
| Color | Black |
| Customer Reviews | 4.8 4.8 out of 5 stars (16,722) |
| Date First Available | August 3, 2022 |
| Flash Memory Size | 4 TB |
| Hard Drive | 4000 GB Solid State Drive |
| Hard Drive Interface | PCIE x 4 |
| Hardware Platform | PC |
| Item Dimensions LxWxH | 3.15 x 0.87 x 0.09 inches |
| Item Weight | 0.264 ounces |
| Item model number | WDS400T2X0E |
| Language | Spanish |
| Manufacturer | Sandisk Technologies, Inc. |
| Product Dimensions | 3.15 x 0.87 x 0.09 inches |
| Series | WD_BLACK SN850X NVMe SSD |
| Voltage | 1 Volts |
M**B
Great quality and reliability
Great quality and reliable functionality that you'd expect from Western Digital. The capacity is amazing, it has blazing fast read/write speeds, and installation was a breeze as it fits a standard M.2 socket. I was able to immediately initialize and partition it for use after installing it. This went into my laptop, so it obviously changed nothing externally and added only a few grams to the weight. It's pricey, but I'd rather get a good one from a brand I trust than just go with the cheapest option available.
P**S
Blazing Fast Performance and Excellent Reliability
The WD_BLACK SN850X 1TB NVMe SSD delivers outstanding speed and performance. Boot times are noticeably faster, games and applications load almost instantly, and overall system responsiveness feels dramatically improved. Installation was simple, and the drive runs reliably even under heavy workloads. It’s a fantastic upgrade for gaming rigs or productivity setups and offers excellent value for such high-end performance.
R**Z
Lightning-fast, reliable, and built for performance — highly recommended.
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.
S**S
Perfect upgrade! works flawlessly, fast and without issues.
I bought this 8TB drive during black friday 2024 over a year ago for $535 and im so glad i did, it still works perfectly on my gaming laptop where i got almost my whole STEAM library of games installed on it. today Jan 11 2026 with the shortage of Ram and NAND chips this same Drive is listed at $899. this thing is perfect and for a PCIe Gen4 NVME drive this is the best available 8TB Drive. there are others like the Samsung SSD 9100 PRO but that is PCIe Gen5 it is backwards compatible with GEN4 but you are praying a premium for performance you cant use if your motherboard/Device cant use GEN5.
A**A
Very fast and reliable—big speed boost, still perfect
Fast, reliable NVMe drive. Installation was straightforward and it immediately delivered a noticeable speed boost—boot times, large file transfers, and app/game loads are all much quicker. It runs stable with no errors or dropouts, and the 4TB capacity is perfect for keeping everything in one place. Still in perfect condition and working exactly as expected.
A**R
The high-water mark of PCI 4.0 SSDs
As good a games drive as you can find, with quick load times and strong random reads. I nabbed a 4TB for under $250 and with all my backlog I still have the thing filled only 3/4, with a fairly low pace of installs these days. For games it should last me another year or so, or until the 8TB is more affordable. Why the 8TB SN850X and not a 4TB of whatever SanDisk 's fast PCIe 5.0 drive? Simply because Gen5 isn't that big an improvement over Gen4 gaming yet, if ever. Further into the Gen5 era, this drive will get cheaper and an even better value. The SN850X already benches the best of any of my ten drives (two other NVMe, two SATA SSD). Numbers: CrystalDiskMark (MB/s) At 78% full, 48C: Seq1m/q8t1: 7183.94 / 6500.35 Seq1m/q1t1: 4931.87 / 5563.49 Rnd4k/q32t1: 811.31 / 702.28 Rnd4k/q1t1: 68.02 / 248.69 Excellent numbers for Gen4. 2400TBW endurance. Owned: about three months, no issues
J**S
Extreme speed and reliable performance for gaming
The 1TB WD_BLACK SN850X was one of the best upgrades I made to my PC. Installation in M.2 format was quick and easy, and I noticed the difference from the very first boot: game loading times were drastically reduced, and the system responded with impressive smoothness. Speeds of up to 7,300 MB/s are truly noticeable in every large file transfer. Furthermore, the compact and elegant design fits perfectly in my system. Without a doubt, this is an SSD designed for gamers seeking power and stability.
B**T
Fine product, but beware of sketchy sellers
Well, the product is fine. Fast, high capacity. It's great. But it seem some sellers/suppliers are trying to pass-off the 2TB variant as 8TB (see picture), and are just putting a sticker for the 8TB ASIN/SKU on the 2TB box/item. So be warned and check it when you receive it to make sure you got what you actually paid for!
A**R
It's the best 8tb nvme drive as of late 2024
P**L
Używany w obudowie Thunderbolt 4 z aktywnym chłodzeniem. No wymiata. PE-TAR-DA.
C**K
Fast delivery and great item
O**R
Very nice
I**Y
Playstation 5 konsolümüm hafızasını genişletmek için ürünü önce Amazon Germany üzerinden almıştım fakat zamanında teslim olmayacağı için iptal edip neredeyse aynı paraya Amazon.com.tr'den satın aldım. Ürün kesinlikle vaad ettiği hızları görüyor. Ps5'de işlem ve depolama hızı isteyen oyunlarımın tamamını sorunsuz şekilde oynabiliyorum. Tek eksiği (ki bunu aşmak çok kolay) soğutucusunun olmaması. Ben harici bir soğutucu alarak bu sorunu bertaraf ettim. Ps5'de hafıza sorunu yaşayanlar biçilmiş kaftan.
Trustpilot
3 weeks ago
4 days ago