Compare Solid State Drives

Compare Western Digital WD_BLACK SN8100 4TB vs WD_BLACK SN850P 4TB

Western Digital WD_BLACK SN8100 4TB and Western Digital WD_BLACK SN850P 4TB are both solid state drives with the same Capacity (4000 GB) and Form Factor (M.2-2280). The main differences are in Interface, Max Sequential Read, Max Sequential Write and MTBF.

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Western Digital WD_BLACK SN8100 4TB

Western Digital WD_BLACK SN850P 4TB

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Brand

Western Digital

Brand

Western Digital

Model

WDS400T1X0M
WDS400T1X0M-00CMT0

Model

WDBBYV0040BNC-WRSN

Release Date

📅 May 2025

Release Date

📅 June 2023

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

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Performance (Charts)

1st / 1746

Performance (Charts)

n/a

Effective Value

84th / 336

Effective Value

-

Price history

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Price history

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Price/GB

$0.20

Price/GB

$0.08

GB/$1

5.06

GB/$1

12.9

Series

-

Series

WD_BLACK SN850

Capacity

4000 GB

Capacity

4000 GB

Interface

PCIe Gen5 x4

Interface

PCIe Gen4 x4

NVME

Yes

NVME

Yes

Form Factor

M.2-2280

Form Factor

M.2-2280

SSD Controller

-

SSD Controller

Western Digital

Max Sequential Read

Up to 14900 MB/s

Max Sequential Read

Up to 7300 MB/s

Max Sequential Write

Up to 14000 MB/s

Max Sequential Write

Up to 6600 MB/s

MTBF

1,750,000 Hours

MTBF

1.75M Hours

Options (2)

	2TB $439.00
	1TB $259.99

Options (4)

	2TB NEW - Up to 7,300MB/s $299.99
	1TB Up to 7,000 MB/s $249.99
	2TB Up to 7,000 MB/s $379.99
	1TB NEW - Up to 7,300MB/s $245.74

Comparison and key differences summary

Reasons to buy the Western Digital WD_BLACK SN8100 4TB:

Newer Product, it was released around 23 months later
Newer interface (PCIe Gen5 x4)

Reasons to buy the Western Digital WD_BLACK SN850P 4TB:

24% cheaper, you can save $190.00

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