SANDISK Optimus GX PRO 850X 8TB Heatsink vs Western Digital WD_BLACK SN8100 8TB SSD Comparison

SANDISK Optimus GX PRO 850X 8TB Heatsink and Western Digital WD_BLACK SN8100 8TB are both solid state drives with the same Capacity (8000 GB), Form Factor (M.2-2280) and MTBF (1,750,000 hours). The main differences are in Interface, Max Sequential Read and Max Sequential Write.

Save comparison

SANDISK Optimus GX PRO 850X 8TB Heatsink	Western Digital WD_BLACK SN8100 8TB
Prices (Change region) In Stock $2,410.99 In Stock Free shipping $2,410.99 In Stock Free shipping $2,410.99 In Stock Free shipping $2,766.24 Show 1 more offers	Prices (Change region) In Stock Free shipping $1,599.99 (~~$1,899.99~~) $300.00 off w/ promo code: FTTF448, ends 6/28 Out of Stock $1,899.99 In Stock $3,730.43
* Pangoly may earn a commission when you use one of the links to make a purchase. (Disclosure)
Brand SanDisk	Brand Western Digital
Model SDSP81800TAH-000E0 SDSP81800TAH	Model WDS800T1X0M-00CMT0
Release Date 📅 February 2026	Release Date 📅 October 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★☆ (27 reviews) Add a product review
Price history View Details ►	Price history View Details ►
Price/GB $0.30	Price/GB $0.20
GB/$1 3.32	GB/$1 5
Series Optimus GX PRO 850X	Series -
Capacity 8000 GB	Capacity 8000 GB
Interface PCIe Gen4 x4	Interface PCIe Gen5 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280
NAND Flash Type 3D NAND TLC	NAND Flash Type -
Max Sequential Read Up to 7200 MB/s	Max Sequential Read Up to 14900 MB/s
Max Sequential Write Up to 6600 MB/s	Max Sequential Write Up to 13200 MB/s
MTBF 1,750,000 hours	MTBF 1,750,000 Hours