Western Digital BLACK SN850X 4TB vs WD_BLACK SN7100 4TB SSD Comparison

Western Digital BLACK SN850X 4TB and Western Digital WD_BLACK SN7100 4TB are both solid state drives with the same Capacity (4000 GB), Interface (PCIe Gen4 x4) and Form Factor (M.2-2280). The main differences are in NAND Flash Type, Max Sequential Read, Max Sequential Write and MTBF.

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Western Digital BLACK SN850X 4TB

Western Digital WD_BLACK SN7100 4TB

Prices
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In Stock

$597.00

Last updated 23 minutes ago.

In Stock

$599.99

Out of Stock

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$599.99

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Prices
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In Stock

$569.00

Last updated 27 minutes ago.

In Stock

Free shipping

$578.00

In Stock

$578.00

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* 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

WDS400T4X0E-00CJA0
WDS400T4X0E

Release Date

📅 August 2022

Release Date

📅 December 2024

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

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Performance (Charts)

25th / 1746

Performance (Charts)

n/a

Effective Value

64th / 336

Effective Value

Price history

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Price history

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Price/GB

$0.08

Price/GB

$0.06

GB/$1

12.9

GB/$1

16.67

Series

BLACK SN850X NVMe

Series

SN7100

Capacity

4000 GB

Capacity

4000 GB

Interface

PCIe Gen4 x4

Interface

PCIe Gen4 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

TLC 3D NAND

Max Sequential Read

Up to 7300 MB/s

Max Sequential Read

Up to 7000 MB/s

Max Sequential Write

Up to 6600 MB/s

Max Sequential Write

Up to 6700 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