Western Digital BLACK SN850X 4TB vs Black 256GB M.2 WDS256G1X0C SSD Comparison

Western Digital BLACK SN850X 4TB and Western Digital Black 256GB M.2 WDS256G1X0C are both solid state drives with the same Form Factor (M.2-2280) and MTBF (1.75M Hours). The main differences are in Performance (+319%), Capacity, Interface and NAND Flash Type.

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Western Digital BLACK SN850X 4TB

Western Digital Black 256GB M.2 WDS256G1X0C

Prices
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In Stock

$599.99

Last updated 37 minutes ago.

In Stock

$599.99

Out of Stock

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$599.99

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Prices
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Out of Stock

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$259.00

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Brand

Western Digital

Brand

Western Digital

Model

WDS400T2X0E

Model

WDS256G1X0C

Release Date

📅 August 2022

Release Date

📅 February 2017

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

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User reviews

★★★★☆

(124 reviews)

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Performance (Charts)

25th / 1746

(0%)

Performance (Charts)

185th / 1746

(-319%)

Effective Value

64th / 336

Effective Value

256th / 336

Price history

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Price history

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Price/GB

$0.08

Price/GB

$1.01

GB/$1

12.9

GB/$1

0.99

Series

BLACK SN850X NVMe

Series

Black

Capacity

4000 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

SSD Controller

20-82-20035-B1

SSD Controller

NAND Flash Type

BiCS5 112-layer TLC

NAND Flash Type

2D NAND

Max Sequential Read

Up to 7300 MB/s

Max Sequential Read

Up to 2050 MB/s

Max Sequential Write

Up to 6600 MB/s

Max Sequential Write

Up to 700 MB/s

MTBF

1.75M Hours

MTBF

1.75M hours

Options (10)

	SN850 w/ Heatsink - Up to 7,000 MB/s 1TB $255.59
	SN850X - Up to 7,300 MB/s 2TB $349.00
	SN850 - Up to 7,000 MB/s 500GB $59.99
	SN850 w/ Heatsink - Up to 7,000 MB/s 500GB $299.00
	SN850 w/ Heatsink - Up to 7,000 MB/s 2TB $239.99
	SN850 - Up to 7,000 MB/s 2TB $291.00
	SN850X - Up to 7,300 MB/s 1TB $222.51
	SN850 - Up to 7,000 MB/s 1TB $187.61
	SN850X w/ Heatsink - Up to 7,300 MB/s 2TB $391.95
	SN850X w/ Heatsink - Up to 7,300 MB/s 1TB $249.00