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M.2 2280 SSD with black metal heatsink

SanDisk

SanDisk WDS400T2XHE-00BCA0 4TB internal SSD

SKU CH-YN58-YJCMT MPN WDS400T2XHE-00BCA0

4TB PCIe 4.0 NVMe M.2 2280 SSD with heatsink delivers 7300 MB/s read, 6600 MB/s write, 1200000 IOPS random read and 2400 TBW endurance

  • Max Sequential ReadUp to 7300 MBps
  • Max Sequential WriteUp to 6600 MBps
  • 4KB Random ReadUp to 1,200,000 IOPS
  • 4KB Random WriteUp to 1,100,000 IOPS
  • Terabytes Written (TBW)2400TB
  • MTTF1.75M Hours

Options 4TB SN850X w/ Heatsink

  • Speeds up to 7300 MB/s read and 6600 MB/s write for fast game loads
  • 4TB capacity stores large libraries without deleting titles
  • Integrated heatsink sustains performance during extended sessions
  • PCIe 4.0 x4 NVMe interface with 4GB DRAM cache delivers low latency
  • 2400 TBW endurance and 1.75M hour MTTF for long-term reliability

WD_BLACK SN850X 4TB NVMe SSD

This PCIe 4.0 x4 drive delivers sequential reads up to 7300 MBps and writes up to 6600 MBps. Random performance reaches 1200000 IOPS read and 1100000 IOPS write. A built-in heatsink and 4GB DRAM cache support sustained throughput during heavy workloads.

Ideal for gaming PCs and PlayStation 5 expansion

The M.2 2280 form factor fits desktop motherboards and the PS5 slot. High endurance of 2400 TBW and 1.75M hours MTTF suit frequent large installs. Systems limited to PCIe 3.0 or lacking M.2 2280 clearance will not realise the rated speeds.

4TB capacity holds large libraries with room to

Sequential bandwidth handles modern AAA titles and content-creation scratch files without bottleneck. Workloads exceeding 2400 TBW or sustained writes beyond thermal limits will trigger throttling despite the heatsink.

Highlights

  • Speeds up to 7300 MB/s read and 6600 MB/s write for fast game loads
  • 4TB capacity stores large libraries without deleting titles
  • Integrated heatsink sustains performance during extended sessions
  • PCIe 4.0 x4 NVMe interface with 4GB DRAM cache delivers low latency
  • 2400 TBW endurance and 1.75M hour MTTF for long-term reliability

Specifications

Max Sequential ReadUp to 7300 MBps
Max Sequential WriteUp to 6600 MBps
4KB Random ReadUp to 1,200,000 IOPS
4KB Random WriteUp to 1,100,000 IOPS
Terabytes Written (TBW)2400TB
MTTF1.75M Hours
HeatSinkwith HeatSink
Form FactorM.2 2280
Capacity4TB
InterfacePCI-Express 4.0 x4
ProtocolNVMe
Cache4GB DRAM
Power Consumption (Active)Average Active Power: 65mW
Maximum Operating Power: 8W
Power Consumption (Idle)PlayStation: 5mW
Max Shock Resistance1,500G @0.5 ms half sine
Max Vibration ResistanceOperating Vibration: 5 gRMS, 10-2000 Hz, 3 axes
Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes
Operating Temperature32°F to 185°F (0°C to 85°C)
Storage Temperature-40°F to 185°F (-40°C to 85°C)
BrandWestern Digital
SeriesBlack
ModelSN850X
Part NumberWDS400T2XHE
Used ForConsumer
FeaturesGain the ultimate gaming edge
Insane speeds up to 7,300MB/s (1TB - 4TB models) deliver top-tier performance with ridiculously short load times - for the elite gaming experience you’ve been waiting for.
Heatsink for the win
All capacities have an optional heatsink version that's not only eye-catching, but also helps your rig maintain peak performance through your most intense gaming sessions.
More room for more games
Capacities up to 8TB built with Western Digital TLC 3D NAND, means you get to keep more games at the ready - and get into the action even faster.
Do more with WD_BLACK Da
Height10.31mm
Width24.46mm
Depth80mm
Weight30.4g
Shipping weight0.07 kg
Package size127 × 102 × 25 mm

Other versions of this model

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Questions about this item

Does my motherboard need an M.2 2280 slot with PCI-Express 4.0 x4 to install this drive?

Yes, the WD_BLACK SN850X is an M.2 2280 NVMe SSD that requires a PCIe 4.0 x4 slot for full performance.

Will this 4TB drive work in a system that only has PCIe 3.0 M.2 slots?

It is backward compatible with PCIe 3.0 slots, but sequential speeds will be limited to the older interface's maximum bandwidth.

How can I verify the drive is running at its rated 7300 MB/s read speed after installation?

Use the WD_BLACK Dashboard on Windows to monitor health and enable Game Mode 2.0, or run a benchmark tool like CrystalDiskMark to confirm sequential read performance.

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