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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

  • Total capacity4 TB
  • Sequential read speedUp to 7,300 MB/s
  • Sequential write speedUp to 6,600 MB/s
  • Interface typePCI-Express 4.0 x4
  • Form factorM.2 2280
  • Random read (4K)Up to 1,200,000 IOPS

Model 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.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $632.99
Pricier than about 83% of the 1,994 comparable items (median $180.49).
Total capacity 4 TB
Higher than about 90% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 7,300 MB/s
Higher than about 87% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $158.25 per TB
Typical for this category: the median of 1,362 items is $165.50 per TB.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameWestern Digital
Product lineBlack
Model nameSN850X
Part numberWDS400T2XHE
Total capacity4 TB
Intended useConsumer
Performance
Sequential read speedUp to 7,300 MB/s
Sequential write speedUp to 6,600 MB/s
Random read (4K)Up to 1,200,000 IOPS
Random write (4K)Up to 1,100,000 IOPS
Storage
Write endurance2400 TB
Cache memory4 GB DRAM
Connectivity
Connection protocolNVMe
Ports & slots
Interface typePCI-Express 4.0 x4
Power
Active power drawAverage Active Power: 65mW
Maximum Operating Power: 8 W
Idle power drawPlayStation: 5mW
Size & build
Form factorM.2 2280
Heat sinkWith HeatSink
Overall height10.31 mm
Overall width24.46 mm
Product depth80 mm
Product weight30.4g
Shipping weight0.07 kg
Package size127 × 102 × 25 mm
Environment & compliance
Max shock tolerance1,500G @0.5 ms half sine
Vibration toleranceOperating Vibration: 5 gRMS, 10-2000 Hz, 3 axes
Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes
Operating temperature range32 °F to 185 °F (0 °C to 85 °C)
Storage temperature range-40 °F to 185 °F (-40 °C to 85 °C)
More details
Mean time to failure1.75M Hours

Other versions of this model

5 more in the same range

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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