SANDISK Optimus GX PRO 850X 8TB Heatsink vs WD_BLACK SN850 500GB + Heatsink SSD Comparison

SANDISK Optimus GX PRO 850X 8TB Heatsink and WD_BLACK SN850 500GB + Heatsink are both solid state drives with the same Interface (PCIe Gen4 x4) and Form Factor (M.2-2280). The main differences are in Capacity.

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SANDISK Optimus GX PRO 850X 8TB Heatsink

WD_BLACK SN850 500GB + Heatsink

Prices
(Change region)

In Stock

Free shipping

$2,699.99

Prices
(Change region)

In Stock

Free shipping

$299.00

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Brand

SanDisk

Brand

Western Digital

Model

SDSP81800TAH-000E0
SDSP81800TAH

Model

WDS500G1XHE

Release Date

📅 February 2026

Release Date

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

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User reviews

★★★★★

(22 reviews)

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Price/GB

$0.34

Price/GB

$0.14

GB/$1

2.96

GB/$1

7.14

Series

BLACK SN850 NVMe

Capacity

8000 GB

Capacity

500 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

WD/SanDisk NVMe G2

NAND Flash Type

3D NAND

Max Sequential Read

Up to 7000 MB/s

Max Sequential Write

Up to 4100 MB/s

MTBF

1.75M Hours

Options (9)

	SN850 - Up to 7,000 MB/s 2TB $303.95
	SN850X - Up to 7,300 MB/s 2TB $331.55
	SN850 - Up to 7,000 MB/s 500GB $59.99
	SN850 w/ Heatsink - Up to 7,000 MB/s 1TB $255.59
	SN850X w/ Heatsink - Up to 7,300 MB/s 1TB $249.00
	SN850X - Up to 7,300 MB/s 1TB $222.51
	SN850 w/ Heatsink - Up to 7,000 MB/s 2TB $239.99
	SN850X w/ Heatsink - Up to 7,300 MB/s 2TB $391.95
	SN850 - Up to 7,000 MB/s 1TB $187.61