Western Digital BLACK SN850X 4TB vs WD_BLACK SN8100 4TB SSD Comparison

Western Digital BLACK SN850X 4TB and Western Digital WD_BLACK SN8100 4TB are both solid state drives with the same Capacity (4000 GB) and Form Factor (M.2-2280). The main differences are in Performance (+42%), Interface, Max Sequential Read and Max Sequential Write.

Save comparison

Western Digital BLACK SN850X 4TB

Western Digital WD_BLACK SN8100 4TB

Prices
(Change region)

In Stock

$597.00

Last updated 23 minutes ago.

In Stock

$599.99

Out of Stock

Free shipping

$599.99

Show 3 more offers

Prices
(Change region)

In Stock

Free shipping

$789.99

In Stock

$789.99

Last updated 25 minutes ago.

In Stock

$789.99

Show 3 more offers

* Pangoly may earn a commission when you use one of the links to make a purchase. (Disclosure)

* Product prices and availability are subject to change frequently. Any price and availability information displayed on Amazon at the time of purchase will apply.

Brand

Western Digital

Brand

Western Digital

Model

WDS400T2X0E

Model

WDS400T1X0M
WDS400T1X0M-00CMT0

Release Date

📅 August 2022

Release Date

📅 May 2025

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

User reviews

Add a product review

User reviews

Add a product review

Performance (Charts)

25th / 1746

(-42%)

Performance (Charts)

1st / 1746

(0%)

Effective Value

64th / 336

Effective Value

84th / 336

Price history

View Details ►

Price history

View Details ►

Price/GB

$0.08

Price/GB

$0.20

GB/$1

12.9

GB/$1

5.06

Series

BLACK SN850X NVMe

Series

Capacity

4000 GB

Capacity

4000 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

20-82-20035-B1

SSD Controller

NAND Flash Type

BiCS5 112-layer TLC

NAND Flash Type

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 (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 $303.95
	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