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WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E - Newegg.com

TLDR Review: WD_BLACK SN850X 4TB SSD

By ShopSavvy Team

Published: January 14th, 2026

Pros

•Offers blazing fast PCIe Gen4 speeds with up to 7,300 MB/s read and over 6,400 MB/s write, drastically cutting down game load and boot times.
•Large 4TB capacity is excellent for gamers and content creators needing ample space for games, media, and projects.
•Compact, singlided M.2 2280 form factor enhances compatibility and cooling, especially in tight or portable setups.
•Consistently reliable performance under heavy workloads without throttling, boasting solid thermal management with standard airflow or basic heatsink cooling.
•Easy installation in any system with a PCIe Gen4 slot, and the WD Dashboard software offers useriendly management with an optional Gaming Mode.
•Stable and responsive performance ideal for demanding multitasking, gaming, and content creation scenarios.

Cons

•Uses 11ayer flash memory, which is slightly behind some competitors featuring newer technology, though firmware optimization helps offset this.
•The "Game Mode 2.0" feature is mostly a marketing angle, with little tangible benefit noticed by users in reaorld use.
•Premium price may seem steep considering other hignd SSDs offer similar or better performance at possibly lower cost.
•Best performance demands a PCIe Gen4 motherboard and good system airflow, otherwise you won’t hit advertised speeds.

Bottom Line

The WD_BLACK 4TB SN850X NVMe SSD is a seriously fast and spacious drive that suits gamers and power users who want a premium, reliable storage upgrade with superb PCIe 4.0 performance in a compact format. However, if you’re budget-conscious or don’t have a Gen4-compatible system, the price and feature set might feel a bit much for what you get—especially since "Game Mode 2.0" doesn’t deliver much beyond hype. For those serious about squeezing every ounce of next-gen speed with a large capacity, this drive is a strong choice worth considering.

Available at Amazon

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How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.

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