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Item#: 9UC20-250-244

WD_BLACK SN8100 NVMe SSD - 2TB, With Heatsink, M.2 2280 PCI-Express 5.0 x4 Internal Solid State Drive (SSD) WDS200T1XHM-00CMT0

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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

Used - Good

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 drive’s 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).

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

Specs

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Overview

The Western Digital WD_BLACK SN850X 4TB NVMe Internal SSD is a consumer internal solid state drive for gaming PCs and workstations. Its PCIe 4.0 x4 interface, NVMe protocol, 4TB capacity, and high sequential read and write speeds provide a high-performance storage configuration.

Key Features

Designed for gaming PC and workstation storage
4TB capacity for storing games and files
3D NAND TLC memory components
Predictive Loading, Overhead Balancing, and Adaptive Thermal Management features

Performance

The drive delivers sequential read speeds up to 7,300 MB/s and sequential write speeds up to 6,600 MB/s. 4KB random performance reaches up to 1,200,000 IOPS for reads and 1,100,000 IOPS for writes.

Design

This M.2 2280 internal SSD measures 2.38mm in height, 22.00mm in width, and 80.00mm in depth, with a weight of 7.50g. The listed configuration is without heatsink.

Connectivity & Compatibility

The WD_BLACK SN850X uses a PCI-Express 4.0 x4 interface and NVMe protocol in an M.2 2280 form factor. The downloadable WD_BLACK Dashboard is available for Windows only.

Reliability & Durability

The drive is rated for 2,400TBW and has an MTTF of 1.75M Hours. Operating temperature is 0°C ~ +85°C, and storage temperature is -40°C ~ +85°C. Maximum shock resistance is 1,500G @0.5 ms half sine. Vibration resistance is rated at 5 gRMS, 10-2000 Hz, 3 axes during operation and 4.9 gRMS, 7-800 Hz, 3 axes when non-operating.

Software & Tools

The downloadable WD_BLACK Dashboard for Windows monitors drive health, lets users customize RGB lighting on heatsink versions, and can automatically detect games to turn on Game Mode 2.0.

Specifications

Brand: Western Digital
Series: BLACK SN850X NVMe
Model: WDS400T2X0E
Device Type: Internal Solid State Drive (SSD)
Used For: Consumer
Capacity: 4TB
Memory Components: 3D NAND TLC
Interface: PCI-Express 4.0 x4
Protocol: NVMe
Max Sequential Read: Up to 7300 MBps
Max Sequential Write: Up to 6600 MBps
4KB Random Read: Up to 1,200,000 IOPS
4KB Random Write: Up to 1,100,000 IOPS
Terabytes Written (TBW): 2400TB
MTTF: 1.75M Hours
Heatsink: without Heatsink
Dimensions: 2.38mm H x 22.00mm W x 80.00mm D
Weight: 7.50g

Model
Brand	Western Digital
Series	BLACK SN850X NVMe
Model	WDS400T2X0E
Device Type	Internal Solid State Drive (SSD)
Used For	Consumer

Details
Form Factor	M.2 2280
Capacity	4TB
Memory Components	3D NAND TLC
Interface	PCI-Express 4.0 x4
Protocol	NVMe

Performance
Max Sequential Read	Up to 7300 MBps
Max Sequential Write	Up to 6600 MBps
4KB Random Read	Up to 1,200,000 IOPS
4KB Random Write	Up to 1,100,000 IOPS
Terabytes Written (TBW)	2400TB
MTTF	1.75M Hours
HeatSink	without HeatSink

Features
Features	Get the Ultimate Gaming Edge Insane speeds up to 7,300 MB/s deliver top-tier performance with ridiculously short load times for the elite gaming experience you've been waiting for. Soup Up Your Rig Extremely low latency loads graphics fast with minimal stutter and lagging for an incredibly smooth, satisfying gaming experience. More Room for More Games Today's A-list titles can take up 200GB or more of storage. A range of capacities from 1TB to 4TB means you get to keep more games at the ready and get into the action fast. Heatsink for the Win The WD_BLACK SN850X NVMe SSD 1TB and 2TB drives have an optional heatsink version that not only looks awesome but also helps your rig maintain peak performance through the most intense gaming sessions. Game Mode 2.0 The latest version of Game Mode serves up even more PC performance-boosting features like load prediction to ready game assets for fast in-game loading. Near-Max PCIe Gen4 Speeds The WD_BLACK SN850X NVMe SSD delivers output approaching the limits of the PCIe Gen4 interface to help you get ultra-fast performance out of your storage and system components.

Environmental
Operating Temperature	0°C ~ +85°C
Storage Temperature	-40°C ~ +85°C
Max Shock Resistance	1,500G @0.5 ms half sine
Max Vibration Resistance	Operating Vibration: 5 gRMS, 10-2000 Hz, 3 axes Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes

Dimensions & Weight
Height	2.38mm
Width	22.00mm
Depth	80.00mm
Weight	7.50g

Additional Information
First Listed on Newegg	October 30, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies

We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

Return for refund until: January 31, 2027
Return for replacement until: January 31, 2027
This item is covered by Newegg.com's Extended Holiday Return Policy.
Read full return policy for details.

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

Used - Good

Learn more about the SanDisk WDS400T2X0E

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies

Manufacturer Contact Info

Item#: 9UC20-250-244

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

Used - Good

Learn more about the SanDisk WDS400T2X0E

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies

Manufacturer Contact Info