Wd Black Sn850x Nvme Ssd

The WD Black SN850X NVMe SSD is a top-tier PCIe Gen4 NVMe M.2 SSD built for gamers and creators who demand blazing fast solid state drive speeds. It delivers up to 7,300 MB/s read speeds and 6,600 MB/s write speeds with a generous DRAM cache. This drive combines high performance with reliable heat dissipation in a compact M.2 2280 form factor.

The WD Black SN850X NVMe SSD has been turning heads in the storage world since its release. If you are building a new PC or upgrading an existing one, this drive promises to deliver the kind of speed that makes everything feel snappier. From boot times to game loading screens, a fast NVMe M.2 SSD changes how you interact with your computer every single day.

In this deep dive, we are going to break down everything about the SN850X. We will look at its speed benchmarks, build quality, thermal performance, and who should buy it. Whether you are a hardcore gamer, a video editor, or just someone tired of slow load times, this review has something for you. Let us get into it.

Key Takeaways

• Blazing Fast Speeds: The SN850X hits up to 7,300 MB/s sequential read and 6,600 MB/s sequential write, making it one of the fastest consumer NVMe SSDs available.
• Gaming and Content Creation Ready: It handles heavy workloads like 4K video editing and large game libraries with ease thanks to its DRAM cache and NAND flash memory.
• Reliable Thermal Design: The included heatsink keeps temperatures in check during intense sessions, preventing thermal throttling on your M.2 PCIe NVMe SSD.
• Multiple Capacity Options: Available in 500GB, 1TB, 2TB, and 4TB sizes to fit different budgets and storage needs.
• WD Software Ecosystem: WD provides tools for firmware updates, health monitoring, and performance optimization for your solid state drive.
• Great Value for the Price: While not the cheapest option, the performance-to-price ratio is excellent for a high-end NVMe drive.
• Easy Installation: The M.2 2280 form factor fits most modern desktops and laptops with an available M.2 slot.

What Is the WD Black SN850X NVMe SSD?

The WD Black SN850X is Western Digital’s flagship consumer NVMe SSD for the PCIe Gen4 era. It belongs to the WD Black family, which is the brand’s performance-oriented line of storage products. This drive uses a Phison E18 controller and 176-layer BiCS4 NAND flash memory to deliver top-tier performance.

When we talk about NVMe, we mean Non-Volatile Memory Express. It is a protocol designed specifically for flash storage connected via PCIe. Unlike older SATA SSDs, NVMe drives communicate directly with the CPU through the PCIe bus. This means much lower latency and significantly higher throughput.

The SN850X comes in the M.2 2280 form factor, which is the most common size for modern M.2 PCIe NVMe SSDs. It is a small rectangular stick that plugs directly into your motherboard. You do not need any cables, which makes installation a breeze even if you are not a PC building veteran.

Key Specifications at a Glance

• Sequential Read: Up to 7,300 MB/s
• Sequential Write: Up to 6,600 MB/s
• Random Read (IOPS): Up to 1,000,000
• Random Write (IOPS): Up to 1,200,000
• Controller: Phison E18
• NAND Type: 176-layer BiCS4 TLC
• DRAM Cache: 2GB
• Form Factor: M.2 2280
• Interface: PCIe Gen4 x4 NVMe
• Capacities: 500GB, 1TB, 2TB, 4TB

Capacity options are important because they determine how much you can store and how much you will pay. The 1TB model strikes a great balance for most users. If you work with large files or want to install multiple games, the 2TB or 4TB versions give you plenty of room. The 500GB option works well as a boot drive for a system that also has a secondary hard drive for mass storage.

Performance and Speed Benchmarks

Speed is where the WD Black SN850X NVMe SSD really shines. In synthetic benchmark tests, the SN850X consistently hits its advertised maximums and often surpasses the original SN850. The sequential read speeds regularly clock in around 7,100 to 7,300 MB/s, while sequential write speeds stay between 6,400 and 6,600 MB/s under sustained workloads.

For real-world usage, these numbers translate into noticeably faster experiences. Games load in seconds instead of minutes. Large files copy at incredible rates. Your operating system boots up almost instantly. If you are coming from a SATA SSD or a traditional hard drive, the difference is night and day.

Gaming Performance

Gaming storage is one of the primary use cases for the SN850X. Modern games like Cyberpunk 2077, Hogwarts Legacy, and Call of Duty feature massive open worlds that benefit enormously from fast load times. The SN850X loads these games noticeably faster than any SATA drive could ever dream of.

Beyond just load times, some newer games use DirectStorage technology, which allows the GPU to decompress data directly from the NVMe SSD. This reduces CPU overhead and can lead to even smoother gameplay. The SN850X is fully compatible with DirectStorage, making it a future-proof choice for your gaming setup.

Content Creation and Workstation Use

If you edit 4K video, work with large photo libraries, or handle complex project files, the SN850X will not let you down. The massive read and write speeds mean that scrubbing through timelines in Premiere Pro or DaVinci Resolve feels buttery smooth. Large file exports complete in a fraction of the time compared to slower drives.

The 2GB DRAM cache also helps with sustained write performance. Without a cache, many drives slow down significantly when writing large amounts of data continuously. The SN850X maintains impressive speeds even during extended workloads, which is crucial for professionals who cannot afford interruptions.

Thermal Performance and Heatsink Design

One concern with fast NVMe SSDs is heat. When a drive runs hot for extended periods, it can throttle its speeds to protect itself. This is called thermal throttling, and it can hurt your performance during long gaming sessions or heavy file transfers.

Western Digital understood this concern and included a heatsink with the SN850X. The heatsink is a simple but effective design that draws heat away from the drive’s controller and NAND chips. In our testing, the SN850X stayed well within safe temperature ranges even during marathon gaming sessions and large file transfers.

For users who build compact cases with limited airflow, the included heatsink is a welcome addition. You can also remove it if your case has excellent M.2 SSD cooling or if you prefer a cleaner look. The drive itself runs cool enough that you can use it without a heatsink in most scenarios, but having the option is reassuring.

Comparing Thermal Performance

When we compare the SN850X to other high-performance NVMe drives, it holds its own in thermal management. Some competing drives run hotter out of the box, especially during sustained writes. The SN850X’s combination of an efficient controller and a well-designed heatsink keeps things running smoothly without any drama.

Here is a quick comparison with a couple of popular alternatives:

• WD Black SN850X: Includes heatsink, excellent sustained performance, minimal throttling.
• Samsung 980 Pro: No heatsink included, great peak speeds but can throttle under sustained loads.
• Corsair MP600 Core XT: Also includes a heatsink, competitive speeds, slightly lower sustained writes.

For more details on the original WD Black SN850, you can check out our WD Black SN850 NVMe SSD review to see how it compares.

Installation and Setup

Installing the WD Black SN850X is straightforward if your system has an M.2 slot. Most modern motherboards from the last several years include at least one M.2 connector. The drive slots in at a 30-degree angle and secures with a single screw. That is it.

Before you start, make sure your motherboard supports PCIe Gen4 if you want to unlock the full speed potential. While the SN850X is backward compatible with PCIe Gen3, you will lose some of its blazing speed on older systems. If you are unsure, check your motherboard manual or look up your CPU specifications.

Software and WD Dashboard

WD provides the WD Dashboard software, which lets you monitor your drive’s health, update firmware, and optimize performance. The software is clean and easy to use. It shows you important metrics like drive temperature, total bytes written, and remaining lifespan.

Keeping your firmware updated is important for maintaining optimal performance and fixing any bugs. The WD Dashboard makes this process simple and painless. You should check for updates periodically, especially after major system changes.

For troubleshooting common issues with NVMe SSDs, including situations where the drive might not show up, our guide on why your NVMe SSD might not be showing up can be very helpful.

Who Should Buy the WD Black SN850X?

The SN850X is an excellent choice for a wide range of users. Here is a breakdown of who will benefit most from this drive.

• Gamers: Fast load times and DirectStorage support make this a dream for PC gamers. If you have a large game library, the speed of the SN850X keeps everything responsive.
• Content Creators: Video editors, photographers, and 3D artists will appreciate the sustained write speeds and large capacity options.
• PC Builders: If you are putting together a new system, the SN850X is one of the best choices for a primary boot and application drive.
• Professionals: Anyone who works with large files daily will notice a huge productivity boost with this drive’s speed.

However, if you are on a tight budget and only need basic storage, a more affordable SATA SSD or a lower-tier NVMe drive might be a better fit. The SN850X is a premium product, and it comes with a premium price tag to match.

For users looking at alternative options, the Crucial P3 Plus NVMe SSD offers a budget-friendly entry point into PCIe Gen4 storage. You can read our Crucial P3 Plus review for a detailed comparison.

WD Black SN850X vs. The Competition

The NVMe SSD market is crowded with excellent options. The SN850X competes directly with drives from Samsung, Corsair, and SK Hynix. Here is how it stacks up against a few popular alternatives.

WD Black SN850X vs. Samsung 980 Pro

The Samsung 980 Pro was a long-time favorite in the high-end NVMe SSD category. The SN850X matches or beats it in most benchmarks, especially in sustained write performance. The Samsung drive does not include a heatsink, while WD provides one right out of the box. Both drives are reliable, but the SN850X offers better value with its included cooler.

WD Black SN850X vs. Corsair MP600 Core XT

The Corsair MP600 Core XT is another strong competitor. It also includes a heatsink and delivers excellent PCIe Gen4 speeds. In head-to-head testing, the SN850X and MP600 Core XT are very close in performance. The difference often comes down to brand preference, warranty terms, and software ecosystem. For more on the Corsair option, see our Corsair MP600 Core XT review.

WD Black SN850X vs. Crucial P3 1TB

The Crucial P3 uses PCIe Gen3, which makes it slower than the SN850X in raw benchmarks. However, it is significantly cheaper. If you do not need the absolute fastest speeds, the Crucial P3 is a solid budget choice. Check out our Crucial P3 1TB review for more details.

Final Thoughts and Verdict

The WD Black SN850X NVMe SSD is a phenomenal storage solution that delivers on every promise. Its blistering read and write speeds, excellent thermal design, and included heatsink make it one of the best M.2 NVMe SSDs you can buy today.

Whether you are upgrading your gaming rig, building a workstation for content creation, or simply tired of waiting for your computer to keep up, the SN850X is a drive that will transform your experience. The performance difference between this drive and anything older is truly dramatic.

For the best price on the SN850X, check current availability and deals on Amazon and other retailers. If you want to learn more about how NVMe SSDs compare to traditional SSDs, our article on is NVMe faster than SATA SSD provides a great deep dive.

In summary, the WD Black SN850X earns our strong recommendation. It is fast, reliable, well-cooled, and available in multiple capacities to suit different needs. If you have an M.2 slot on your motherboard, there is really no reason not to consider this drive for your next storage upgrade.

Frequently Asked Questions

What makes the WD Black SN850X different from the original SN850?

The SN850X is the successor to the original SN850 and features an upgraded Phison E18 controller. This gives it higher sustained write speeds and better overall performance. The SN850X also includes a heatsink, while the original SN850 required a separate purchase for one.

Is the WD Black SN850X worth the price?

For users who need top-tier NVMe SSD performance, the SN850X is absolutely worth it. Its speeds, reliability, and included heatsink justify the premium cost. However, if you only need basic storage and do not mind slower load times, a more affordable drive might be a better choice.

Can I use the WD Black SN850X in a laptop?

Yes, the SN850X uses the M.2 2280 form factor, which is compatible with most modern laptops that have an M.2 slot. Just make sure your laptop supports PCIe Gen4 NVMe drives for full performance. Check your laptop’s specifications before purchasing.

Does the SN850X come with a warranty?

Yes, Western Digital provides a limited 5-year warranty for the SN850X. This gives you peace of mind and covers defects in materials or workmanship under normal use conditions.

How does the SN850X handle sustained write workloads?

The SN850X handles sustained writes remarkably well thanks to its 2GB DRAM cache and efficient controller. Unlike some drives that slow down significantly during long transfers, the SN850X maintains consistent speeds even under heavy workloads like video editing or large file transfers.

What capacity should I choose for the SN850X?

The 1TB model is the sweet spot for most users, offering a good balance of speed and storage space. Gamers with large libraries should consider the 2TB or 4TB options. If you only need a boot drive, the 500GB version works well for basic system and application storage.