Western Digital BLACK SN850X 4TB M.2 2280 NVMe PCIe Gen4 x4 Internal SSD

Overview

The Western Digital WDS400T2X0E-00BCA0 is a 4TB internal solid-state drive designed to deliver fast and reliable storage for demanding applications. It fits into the M.2 2280 slot and connects via a PCIe Gen4 x4 interface, allowing it to reach sequential read speeds up to 7,300MB/s and write speeds up to 6,600MB/s. This drive is well suited to gamers, creative professionals, and power users who require quick access to large files and smooth multitasking performance.

Built with TLC 3D NAND flash, the SSD balances speed and endurance, supporting advanced features like Microsoft DirectStorage and Game Mode 2.0 to optimize gaming load times and responsiveness. Its adaptive thermal management helps maintain performance during extended use, making it a strong choice for high-performance desktops and workstations.

Key features

• PCIe Gen4 x4 NVMe interface enables rapid data transfer for faster load times and file access
• Game Mode 2.0 and Microsoft DirectStorage support reduce latency and improve gaming responsiveness on Windows systems
• Adaptive Thermal Management prevents overheating to sustain high performance during intensive workloads
• Predictive Loading technology anticipates data needs to speed up application and game launches
• Large 4TB capacity provides ample space for extensive game libraries, video projects, and data sets
• Durable TLC 3D NAND flash ensures a balance of speed and long-term reliability
• 5-year limited warranty offers confidence in the drive’s longevity and quality

Key specs

• Storage capacity: 4TB
• Form factor: M.2 2280
• Interface: PCIe Gen4 x4 NVMe
• Sequential read speed: up to 7,300MB/s
• Sequential write speed: up to 6,600MB/s
• Random read IOPS: up to 1,200K
• Random write IOPS: up to 1,100K
• Endurance: 2,400 terabytes written

Connectivity and compatibility

This SSD fits into any compatible M.2 2280 slot supporting PCIe Gen4 x4 NVMe, making it suitable for modern desktops and high-end laptops that support this interface. It is optimized for Windows systems to take full advantage of features like Microsoft DirectStorage and Game Mode 2.0, enhancing gaming and professional workflows.

Ideal uses and environments

The Western Digital BLACK SN850X 4TB is a strong choice for users who demand fast storage with large capacity. It works well in gaming setups where reducing load times is critical, as well as in creative environments handling large video or design files. Its endurance and thermal management also make it reliable for extended heavy workloads in professional workstations.