Shipping
Specifications
Storage Capacity4000 gigabytesStorage Drive TypeSSDMaximum Read Speed7300 megabytes per secondMaximum Write Speed6600 megabytes per secondForm FactorM.2 2280Interface(s)PCIe Gen 4 x4
Key Specs
Storage Capacity4000 gigabytesStorage Drive TypeSSDMaximum Read Speed7300 megabytes per secondMaximum Write Speed6600 megabytes per secondForm FactorM.2 2280Interface(s)PCIe Gen 4 x4
General
Product NameBLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMeBrandWDModel NumberWDBB9G0040BNC-WRSNColorBlackColor CategoryBlack
Capacity
Storage Capacity4000 gigabytes
Performance
Storage Drive TypeSSDMaximum Read Speed7300 megabytes per secondMaximum Write Speed6600 megabytes per secondSSD Endurance2400 terabytesHeatsinkNo
Compatibility
Internal Or ExternalInternalProduct CompatibilityDesktop computers, Laptop computersForm FactorM.2 2280Interface(s)PCIe Gen 4 x4Operating System CompatibilityWindows
Features
UsageEveryday computing, Gaming, Performance computing
Memory
NAND Flash Memory TypeTLC
Dimension
Product Height0.09 inchesProduct Width0.87 inchesProduct Weight0.32 ounces
Warranty
Manufacturer's Warranty - Parts5 YearsManufacturer's Warranty - Labor5 years
Other
UPC619659193454
Strap in for breakneck gaming speeds with the WD_BLACK SN850X NVMe internal SSD. Crush load times and slash throttling, lagging, and model pop-ins for a smooth, fast experience that lets you compete at your absolute peak. This purpose-built gaming drive comes in the capacity of 4TB. With the advanced features of Game Mode 2.0 (Windows only) plus speeds that approach the limits of the PCIe Gen43 interface, the WD_BLACK SN850X NVMe SSD delivers top-tier performance to keep you playing, streaming, recording, and dominating the game.
PCIe Gen 4 x4 (NVMe) interface
Offers simple connection to your computer.
4TB storage capacity
Provides ample storage space for your music, movies and other files.
Reach high performance
The NVMe technology delivers up to 7300MB/sec. data transfer rate speed for a smooth, responsive and powerful gaming experience.
Limited warranty
This WD_BLACK SN850X SSD comes with a 5-year warranty.
Game Mode 2.0 technology
Includes performance-boosting features, such as load prediction to ready game assets for fast in-game loading.
What's Included
WD_BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe
Owner's manual
Search
Q: QuestionCan this work in a ps5(8 answers)
A: AnswerYes. Just put a 4 TB in a PS5 and no problem so far. 6500 MB/s read speed reported upon a very quick format.Answered by Me359
Q: QuestionIs heatsync included(3 answers)
A: AnswerNo but you can get a good one for under $15Answered by MacBook
Q: QuestionWill i have room/need a heat sink on my predator helios 315-55-795c?(3 answers)
A: AnswerYou can get a good heatsink for less than $15 not sure it will fit your unit so check the ssd in the slot first if spacing looks good, add the heatsink. The ssd will work fine with or without the heatsink but your laptop will run cooler with it.Answered by MacBook
Q: QuestionIs this compatible with an Asus Rog Ally X?(2 answers)
A: AnswerYes it took me maybe 10 minutes to swap out. You may want to get some thermal tape, I just used the piece that was on the ssd in the device but I don't know if that's advisable or not. I have had no temperature issues my device typically stays right around 80c while playing intensive game on turbo plugged in.Answered by ShannonC
Asked by spanish
- A: AnswerHello, The WD BLACK SN850X is a NVMe SSD. It's super-compact. The drive comes with single-sided. Its comes with option of heatsink and non- heatsink option to use in. Compatibility will support computers with M.2 (M-Key) ports that are capable of taking the M.2 2280 form factor. Please check with the manufacturer vendor whether the WD drive will fit and support the host device. For more information on the drive refer to the link: https://www.westerndigital.com/en-in/products/internal-drives/wd-black-sn850x-nvme-ssd#WDS100T2X0E -Need Help? Please see our "'Contact Us" page for information.
Answered by Western Digital Team
- A: AnswerYes it will work it is pcie gen 4 so to get the best speed you need to have a board that has that pcie Gen 4 but it will work even if you have a pcie gen 3 but it won't work at the full speed great Drive I don't know what you meant by by an OP.
Answered by KennK
- A: Answerthe person who answered this question earlier must NOT have the 4TB version of the SN850X, because the 4TB stick is definitely DOUBLE SIDED (I am staring at it right now)
Answered by BenM
Reviews
Rating 4.9 out of 5 stars with 370 reviews
4.9Rating by feature
- 4.7Value
Rating 4.7 out of 5 stars
- 4.9Quality
Rating 4.9 out of 5 stars
- 4.9Ease of Use
Rating 4.9 out of 5 stars
4 expert reviews
Customers are saying
Customers enjoy the BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe for its large storage capacity, easy installation, and great performance. It is a reliable product that is perfect for gaming and compatible with various devices. While some customers find it a bit pricey, many believe it is worth the investment for its speed and reliability.
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
Top-Tier Performance with WD BLACK
### Top-Tier Performance with WD BLACK SN850X 4TB Internal SSD The WD BLACK SN850X 4TB Internal SSD is a powerhouse storage solution that’s perfect for gamers and professionals who need speed and reliability. Here’s why this SSD is a top choice: #### Blazing Fast Speeds The SN850X delivers exceptional performance with sequential read speeds up to 7,300MB/s and write speeds up to 6,600MB/s. These speeds ensure rapid load times for games and applications, making it one of the fastest SSDs on the market. It significantly reduces latency, providing a smoother and more responsive computing experience [oai_citation:1,WD BLACK SN850X SSD Review - StorageReview.com](https://www.storagereview.com/review/wd-black-sn850x-ssd-review) [oai_citation:2,WD Black SN850X review](https://www.pcgamesn.com/wd/black-sn850x-review). #### Enhanced Gaming Features Equipped with Game Mode 2.0, this SSD optimizes performance for gaming by reducing load times and improving in-game responsiveness. While the exact workings of Game Mode 2.0 are somewhat mysterious, it ensures the drive is always ready to deliver top performance during your gaming sessions [oai_citation:3,WD BLACK SN850X Review: A Solid NVMe SSD | Dong Knows Tech](https://dongknows.com/wd-black-sn850x-review/). #### Reliable and Durable The SN850X is built with TLC NAND and a robust WD 20-82-20035-B1 controller, ensuring long-lasting durability and consistent performance. It comes with a solid five-year warranty and an endurance rating of up to 2,400TBW (terabytes written) for the 4TB model, providing peace of mind for heavy usage scenarios [oai_citation:4,WD Black SN850X review](https://www.pcgamesn.com/wd/black-sn850x-review) [oai_citation:5,WD BLACK SN850X Review: A Solid NVMe SSD | Dong Knows Tech](https://dongknows.com/wd-black-sn850x-review/). #### Efficient Thermal Management While the SN850X does run hot under heavy loads, it features efficient thermal management to prevent throttling. Users can opt for the version with an integrated heatsink, which helps maintain optimal temperatures even during intense operations. This makes it a great choice for high-performance builds and gaming rigs [oai_citation:6,WD BLACK SN850X SSD Review - StorageReview.com](https://www.storagereview.com/review/wd-black-sn850x-ssd-review) [oai_citation:7,WD Black SN850X review](https://www.pcgamesn.com/wd/black-sn850x-review). ### Final Thoughts The WD BLACK SN850X 4TB Internal SSD is an excellent choice for anyone needing fast, reliable, and high-capacity storage. Its top-tier speeds, gaming optimization features, and robust build quality make it ideal for gamers and professionals alike. Whether you're looking to reduce load times or enhance overall system responsiveness, this SSD delivers impressive performance. Feel free to share this review to help others discover why the WD BLACK SN850X is a fantastic upgrade for any high-performance setup!
Posted by SimpleJustice
Rated 5 out of 5 stars
High end nvme for gaming needs
Excellent price for a high end nvme. I got this for my gaming laptop and it performed well. Specs is right up there with the best of the best. I was also able to get it during the sale and got it for pretty low price right before the new year. Prices for ssd are excepted to drop, but for now I should be good for plenty of games on my gaming laptop. Speed is very fast. See picture of the crystalmark. Definitely not the fastest at sequential, but the IOPs is out of this world and that is what really matters when you are doing a lot of small random files. I highly recommend this for anyone who wants the best right now for a reasonable price. My only gripe is this is a 2 sided nvme meaning there are flash chips on both sides of the board. This might not be a big issue for some but for me, it made the chip a bit chunky. I compensated on my laptop by not screwing it too tightly and use light threadlocker to prevent the screw from coming loose.
Posted by AIGamingCryptoBot
Rated 5 out of 5 stars
Will speed your system up more than anything else.
Okay, there is not much to review. Just pop them into your Gen 4 slot (Gen 3 will work but be slower) and away you go. It is super easy and if you have to force it, it may not be the right type. These things are rockets even compared to your SATA connected SSDs. It made more of a difference in speed on my system than did 64GB of RAM, or a top of the line Intel I9. This is the best upgrade you can put in your system as hard drives are a choke point for data. I recommend a small drive for your OS drive. 500GB will suffice in most cases even if you have a lot of apps but I went with a 1TB because that was the smallest I could get. I then put in two 4TB drives for DATA storage. The reason you want to keep the OS drive small is so you can make backups on the DATA drive. You can partition the large one down for the OS drive but be careful restoring the OS. If your system supports Gen 4 or Gen 3 these are a great option for speed!
Posted by DarvinA