SANDISK Optimus GX PRO 850X 8TB Heatsink vs Western Digital WD_BLACK SN850 2TB PS5 SSD Comparison

SANDISK Optimus GX PRO 850X 8TB Heatsink and Western Digital WD_BLACK SN850 2TB PS5 are both solid state drives with the same Interface (PCIe Gen4 x4) and Form Factor (M.2-2280). The main differences are in Capacity, Max Sequential Read and Max Sequential Write.

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SANDISK Optimus GX PRO 850X 8TB Heatsink	Western Digital WD_BLACK SN850 2TB PS5
Prices (Change region) In Stock Free shipping $2,699.99 In Stock Free shipping $2,699.99 Out of Stock Free shipping $2,766.30	Prices (Change region) In Stock $394.99 Last updated 32 minutes ago.
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Brand SanDisk	Brand Western Digital
Model SDSP81800TAH-000E0 SDSP81800TAH	Model WDBBKW0020BBK-WRSN
Release Date 📅 February 2026	Release Date 📅 November 2022
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★★ (5 reviews) Add a product review
Price history View Details ►	Price history View Details ►
Price/GB $0.34	Price/GB $0.20
GB/$1 2.96	GB/$1 5.06
Series Optimus GX PRO 850X	Series WD_BLACK SN850
Capacity 8000 GB	Capacity 2000 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 -	SSD Controller Western Digital
NAND Flash Type 3D NAND TLC	NAND Flash Type -
Max Sequential Read Up to 7200 MB/s	Max Sequential Read Up to 7000 MB/s
Max Sequential Write Up to 6600 MB/s	Max Sequential Write Up to 5100 MB/s
MTBF 1,750,000 hours	MTBF -