Compare Solid State Drives

Compare SANDISK Optimus GX PRO 850X 1TB Heatsink vs Western Digital Black 256GB M.2 WDS256G1X0C

SANDISK Optimus GX PRO 850X 1TB Heatsink and Western Digital Black 256GB M.2 WDS256G1X0C are both solid state drives with the same Form Factor (M.2-2280). The main differences are in Capacity and Interface.

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SANDISK Optimus GX PRO 850X 1TB Heatsink

Western Digital Black 256GB M.2 WDS256G1X0C

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Brand

SanDisk

Brand

Western Digital

Model

SDSP81100TAH-000E0
SDSP81100TAH

Model

WDS256G1X0C

Release Date

📅 February 2026

Release Date

📅 February 2017

* First availability for purchase, it may not correspond to the actual market launch date.

User reviews

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User reviews

★★★★☆

(124 reviews)

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Performance (Charts)

n/a

Performance (Charts)

185th / 1746

Effective Value

-

Effective Value

256th / 336

Price history

View Details ►

Price history

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Price/GB

$0.35

Price/GB

$1.01

GB/$1

2.86

GB/$1

0.99

Series

-

Series

Black

Capacity

1000 GB

Capacity

256 GB

Interface

PCIe Gen4 x4

Interface

PCIe Gen3 x4

NVME

Yes

NVME

Yes

Form Factor

M.2-2280

Form Factor

M.2-2280

NAND Flash Type

-

NAND Flash Type

2D NAND

Max Sequential Read

-

Max Sequential Read

Up to 2050 MB/s

Max Sequential Write

-

Max Sequential Write

Up to 700 MB/s

MTBF

-

MTBF

1.75M hours

-

Options (1)

Western Digital 512GB M.2 WDS512G1X0C

512GB
$288.00

Comparison and key differences summary

Reasons to buy the SANDISK Optimus GX PRO 850X 1TB Heatsink:

Newer Product, it was released around 9 years later
More Capacity (+744 GB available)
Newer interface (PCIe Gen4 x4)

Reasons to buy the Western Digital Black 256GB M.2 WDS256G1X0C:

26% cheaper, you can save $90.99

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