Western Digital WD_BLACK SN850X 4TB with Heatsink NVMe PCIe 4.0 x4 M.2 2280 SSD — Ultra-Fast TLC 3D NAND, 7,300 MB/s Read, 6,600 MB/s Write, Advanced Thermal Management, DirectStorage Support, Compatible with Windows 10+ & PS5, 3-Year Warranty, Black

General Information

The WD_BLACK SN850X 4TB NVMe SSD with Heatsink is a high-performance, high-endurance SSD designed for elite gaming, content creation, and intensive workloads in laptops, handheld gaming devices, and compact desktops. It features PCIe Gen4 x4 interface, ultra-fast sequential speeds, and an included advanced heatsink, making it ideal for 4K/8K video editing, 3D rendering, AI workloads, and large game libraries.

With 7,300 MB/s read / 6,600 MB/s write, 1.2M random IOPS, and predictive loading technology, this drive delivers blistering speed and consistent performance under heavy loads.

Performance & Speed

• Interface: PCIe Gen4 x4 – up to 7,300 MB/s read and 6,600 MB/s write
• Sequential Read Speed: Up to 7,300 MB/s
• Sequential Write Speed: Up to 6,600 MB/s
• Random Read IOPS: Up to 1,200,000
• Random Write IOPS: Up to 1,100,000
• NAND Type: TLC 3D NAND Flash – high-density, low-power flash memory
• Thermal Management:
  • Included advanced heatsink for sustained performance under load
  • Prevents thermal throttling during prolonged gaming or workloads
• Power Efficiency:
  • Optimized for battery life in laptops and handhelds
  • Low power consumption with power loss protection

Gaming Features

• Predictive Loading Technology:
  • Proactively loads game assets based on usage patterns
  • Reduces load times and stutter in AAA games
• Overhead Balancing & Adaptive Thermal Management (ATM):
  • Dynamically adjusts performance to prevent throttling
  • Improves efficiency and longevity under sustained workloads
• Microsoft DirectStorage Support:
  • Enables faster data access from SSD to GPU
  • Improves game load times and efficiency
• PS5 Compatibility:
  • Heatsink version required for PlayStation 5 compatibility
  • Supports fast storage expansion for PS5 games

Software & Features

• WD_BLACK Dashboard Software:
  • Monitors drive health, temperature, wear level, and performance
  • Provides real-time alerts and firmware updates
  • Includes Game Mode 2.0 for reduced latency
  • RGB lighting control (heatsink models only)
• Optimized for Gaming & Content Creation:
  • Fast load times for AAA games, large datasets, and video editing
  • Reduces stutter and lag in intense workloads