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Black rectangular M.2 2280 circuit board with gold edge connector and black controller chip

Western Digital

Western Digital Black SN850X 2TB NVMe M.2 2280 internal SSD

SKU CH-Q98X-9Z751

2 TB M.2 2280 NVMe drive delivers 7300 MB/s reads and 6600 MB/s writes with 1200K random read IOPS and 1100K random write IOPS

  • Sequential read speed7,300 MB/s
  • Sequential write speed6,600 MB/s
  • Interface typeNVME, PCI Express
  • Form factorM.2 2280
  • Random read (4K)1200K IOPS
  • Random write (4K)1100K IOPS
  • Sequential read reaches 7300 MB/s for fast game loads
  • Sequential write hits 6600 MB/s to move large files quickly
  • Random read delivers 1200K IOPS for snappy OS response
  • Random write provides 1100K IOPS for smooth multitasking
  • Active power draw reduced by 25 percent for longer laptop runtime

Capacity and interface

The Western Digital Black SN850X is a 2TB NVMe M.2 2280 internal SSD built for high-performance desktops and laptops. It delivers maximum sequential read speeds of 7300MB/s and write speeds of 6600MB/s for demanding workloads.

Upgrade from previous WD Black drives

This model improves on earlier WD Black SSDs with an active power draw up to 25% lower. The efficiency gain extends battery life in portable systems and reduces cell-to-cell interference for enhanced reliability.

PCIe x4 NVMe limits

The drive operates over a PCIe x4 NVMe interface, so peak throughput requires a compatible motherboard slot and CPU lane allocation. Random performance reaches 1200K IOPS read and 1100K IOPS write within that bandwidth ceiling.

How it compares

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

Price $303.99
Pricier than about 69% of the 1,994 comparable items (median $180.49).
Sequential read speed 7,300 MB/s
Higher than about 87% of the 1,180 comparable items (median 2,400 MB/s).
Sequential write speed 6,600 MB/s
Higher than about 87% of the 1,184 comparable items (median 1,700 MB/s).

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Specifications

Product
Brand nameWestern Digital
Part numberWDS200T2 × 0E
Performance
Sequential read speed7,300 MB/s
Sequential write speed6,600 MB/s
Random read (4K)1200K IOPS
Random write (4K)1100K IOPS
Ports & slots
Interface typeNVME, PCI Express
Size & build
Form factorM.2 2280

Questions about this item

Does the M.2 2280 form factor fit a standard motherboard slot?

Yes, the 2280 length matches the common M.2 slot found on most desktop and laptop motherboards.

What is the common installation mistake with the PCIe x4 NVMe interface?

The drive must be seated in a slot wired for four PCIe lanes; using a slot limited to two lanes halves the 7300 MB/s read and 6600 MB/s write potential.

How does the 25 % lower active power draw affect long-term reliability?

Reduced power consumption decreases cell-to-cell interference, which helps maintain the 1200K random read and 1100K random write IOPS over the drive's lifespan.

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