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Western Digital Black SN850X NVMe 4TB M.2 2280 PCI-E NVMe X4 Internal SSD - WDS400T2XHE

Western Digital Black SN850X NVMe 4TB M.2 2280 PCI-E NVMe X4 Internal SSD - WDS400T2XHE

Part Number: WDS400T2XHE
Manufacturer: Western Digital

Condition: New

Weight: 3.0 lbs

Availability: In stock

Regular price $1,056.35
Regular price Sale price $1,056.35
Shipping calculated at checkout.
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WD Black SN850X 4TB NVMe PCIe 4.0 M.2 2280 SSD with Heatsink — WDS400T2XHE

The WD Black SN850X (WDS400T2XHE) is a 4TB PCIe 4.0 NVMe M.2 2280 SSD with an integrated heatsink, combining massive capacity with superior thermal management. Built on 3D TLC NAND with GameMode 2.0 technology, it delivers sequential read speeds up to 7,300 MB/s. The heatsink variant is ideal for open-air gaming builds, workstations, and PS5 upgrades where sustained performance under thermal load is critical.

Key Specifications

  • Part Number / MPN: WDS400T2XHE
  • Manufacturer: Western Digital (WD)
  • Product Line: WD Black SN850X
  • Capacity: 4TB
  • Interface: PCIe 4.0 x4, NVMe 1.4
  • Form Factor: M.2 2280
  • NAND Type: 3D TLC NAND
  • DRAM Cache: Yes
  • Heatsink: Yes (integrated)

Performance

  • Sequential Read: Up to 7,300 MB/s
  • Sequential Write: Up to 6,600 MB/s
  • Random Read (4K): Up to 1,200,000 IOPS
  • Random Write (4K): Up to 1,100,000 IOPS
  • GameMode 2.0: Adaptive thermal and cache optimization for sustained gaming performance

Reliability & Endurance

  • TBW: 2,400 TBW
  • MTBF: 1,750,000 hours
  • Warranty: 5 years limited
  • RoHS compliant

Features

  • Integrated heatsink — improved thermal dissipation for sustained peak performance
  • PCIe 4.0 x4 — up to 2x faster than PCIe 3.0 NVMe
  • GameMode 2.0 for optimized gaming performance
  • WD Dashboard software for health monitoring and firmware updates
  • Backward compatible with PCIe 3.0 systems

Physical & Environmental

  • Form Factor: M.2 2280 with heatsink (increased height)
  • Interface Key: M-key (PCIe/NVMe)
  • Operating Temperature: 0°C to 70°C
  • Storage Temperature: -40°C to 85°C
  • Operating Voltage: 3.3V

Compatibility

  • Compatible with M.2 PCIe 4.0 or PCIe 3.0 slots (M-key) with heatsink clearance
  • Compatible with PlayStation 5 (PS5) M.2 expansion slot
  • Intel 12th Gen+ and AMD Ryzen 5000/7000 for full PCIe 4.0 speeds
  • Compatible with Windows 10/11 and Linux
  • Verify M.2 slot clearance for heatsink height before installing in compact cases

Frequently Asked Questions

Why do I see an incorrect image for this item?

Images may be representative of the product model. For Refurbished items, the actual unit may differ in appearance from the image shown.

Specifications, part number, condition and included accessories are stated on this page.

What do you mean by term Refurbished?

Refurbished means a used computer part or device that has been cleaned, checked, and repaired to make sure it works properly again. Unlike regular second-hand items, refurbished products go through testing and fixing so they can perform like new.

How many days does it take to ship goods to customers?

All orders are processed within 1-2 business days. Orders placed on weekends or public holidays will be processed on the next business day. For more info visit shipping policy.

What is your return policy?

We offer a 30-day return policy subject to the terms and conditions described in our Refund Policy. Restocking fees may apply to eligible non-faulty returns. Kindly take a look at our Return Policy page.

Do you deliver my ordered items in their original retail box?

For Brand New items, you will receive them in their original retail box. For Refurbished items, you will receive them in a Brown Box or Bulk Packaging.

Do your printers come with ink cartridges?

Refurbished printers do not come with ink cartridges or toners.