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Rectangular M.2 2280 SSD with black finned heatsink and Western Digital branding

SanDisk

SanDisk WDS800T2XHE-00CDD0 8TB internal SSD

SKU CH-845B-CFSYF MPN WDS800T2XHE-00CDD0

An 8 TB M.2 2280 NVMe SSD with PCI-Express 4.0 x4 interface, 8 GB DRAM cache, integrated heatsink, 7200 MBps read and 6600 MBps write speeds, plus 4800 TBW endurance

  • Total capacity8 TB
  • Sequential read speedUp to 7,200 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 8TB SN850X w/ Heatsink

  • Up to 7200 MB/s sequential read cuts game load times
  • 8TB capacity stores a large library without deleting titles
  • Integrated heatsink sustains peak speeds during extended sessions
  • 4800 TBW endurance rating supports heavy write workloads
  • 75 million hours MTTF indicates long-term reliability

WD_BLACK SN850X 8TB NVMe SSD

The WD_BLACK SN850X is an 8TB internal solid-state drive built for gaming PCs and workstations that demand maximum throughput. It uses a PCIe 4.0 x4 interface with NVMe protocol and includes an integrated heatsink to sustain performance during extended sessions.

PCIe 4.0 x4 interface with NVMe protocol

This drive connects through an M.2 2280 slot using four lanes of PCI Express 4.0. The NVMe protocol unlocks sequential reads up to 7200 MBps and writes up to 6600 MBps, with 4KB random read and write performance reaching 1,200,000 IOPS.

8TB capacity with 4800 TBW endurance

The 8TB NAND array provides space for large game libraries and creative workloads without constant uninstalling. A 4800 TBW rating and 1.75M hour MTTF indicate ample write headroom, while the heatsink helps manage thermals up to the 85°C operating limit.

How it compares

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

Price $973.99
Pricier than about 90% of the 1,994 comparable items (median $180.49).
Total capacity 8 TB
Higher than about 94% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 7,200 MB/s
Higher than about 83% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $121.75 per TB
Cheaper than about 72% of the 1,362 comparable items (median $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 numberWDS800T2XHE
Total capacity8 TB
Intended useConsumer
Performance
Sequential read speedUp to 7,200 MB/s
Sequential write speedUp to 6,600 MB/s
Random read (4K)Up to 1,200,000 IOPS
Random write (4K)Up to 1,200,000 IOPS
Storage
Write endurance4800 TB
Cache memory8 GB DRAM
Connectivity
Connection protocolNVMe
Ports & slots
Interface typePCI-Express 4.0 x4
Power
Active power drawAverage Active Power: 130mW
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 size130 × 102 × 95 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

What does the 7,200 MB/s sequential read figure mean once the drive is installed in a PC or PS5?

The 7,200 MB/s sequential read speed is the peak throughput the controller can deliver over a PCIe 4.0 x4 link. Real-world game load times will be lower because they depend on file sizes, queue depth, CPU decompression and the host platform's own I/O stack.

How does the PCIe 4.0 x4 interface cap performance in practice?

A PCIe 4.0 x4 connection provides a theoretical ceiling of roughly 8 GB/s, so the drive's 7,200 MB/s read and 6,600 MB/s write ratings sit close to that limit; you will not exceed those numbers on a PCIe 4.0 slot, and a PCIe 3.0 slot would roughly halve the maximum throughput.

What physical space and mounting does the M.2 2280 form factor with heatsink require?

The drive is 22 mm wide and 80 mm long (2280) and includes a pre-attached heatsink that adds height; ensure your motherboard or PS5 expansion slot has clearance for a double-sided M.2 module with a heatsink and uses a standard M.2 screw for securing it.

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