Compare Solid State Drives

Compare Western Digital WD_BLACK SN850P 4TB vs WD_BLACK SN8100 2TB

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

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Western Digital WD_BLACK SN850P 4TB

Western Digital WD_BLACK SN8100 2TB

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Brand

Western Digital

Brand

Western Digital

Model

WDBBYV0040BNC-WRSN

Model

WDS200T1X0M
WDS200T1X0M-00CMT0

Release Date

📅 June 2023

Release Date

📅 May 2025

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

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Performance (Charts)

n/a

Performance (Charts)

3rd / 1746

Effective Value

-

Effective Value

6th / 336

Price history

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Price history

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Price/GB

$0.08

Price/GB

$0.11

GB/$1

12.9

GB/$1

9.16

Series

WD_BLACK SN850

Series

-

Capacity

4000 GB

Capacity

2000 GB

Interface

PCIe Gen4 x4

Interface

PCIe Gen5 x4

NVME

Yes

NVME

Yes

Form Factor

M.2-2280

Form Factor

M.2-2280

SSD Controller

Western Digital

SSD Controller

-

Max Sequential Read

Up to 7300 MB/s

Max Sequential Read

Up to 14900 MB/s

Max Sequential Write

Up to 6600 MB/s

Max Sequential Write

Up to 14000 MB/s

MTBF

1.75M Hours

MTBF

1,750,000 Hours

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

Options (2)

	1TB $259.99
	4TB $789.99

Comparison and key differences summary

Reasons to buy the Western Digital WD_BLACK SN850P 4TB:

More Capacity (+2000 GB available)

Reasons to buy the Western Digital WD_BLACK SN8100 2TB:

31% cheaper, you can save $188.19
Newer Product, it was released around 23 months later
Newer interface (PCIe Gen5 x4)

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