Western Digital WD_BLACK SN8100 4TB vs SANDISK Optimus GX 7100 2TB SSD Comparison

Western Digital WD_BLACK SN8100 4TB and SANDISK Optimus GX 7100 2TB are both solid state drives with the same Form Factor (M.2-2280) and MTBF (1,750,000 Hours). The main differences are in Capacity, Interface, Max Sequential Read and Max Sequential Write.

Save comparison

Western Digital WD_BLACK SN8100 4TB	SANDISK Optimus GX 7100 2TB
Prices (Change region) In Stock $789.00 Last updated 20 minutes ago. In Stock Free shipping $789.99 In Stock $789.99 In Stock Free shipping $789.99 In Stock $789.99 Out of Stock Free shipping $868.00 Show 3 more offers	Prices (Change region) In Stock Free shipping $539.99 In Stock $539.99 In Stock Free shipping $539.99 In Stock $539.99 Last updated 23 minutes ago. In Stock Free shipping $552.26 In Stock $599.99 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 SanDisk
Model WDS400T1X0M WDS400T1X0M-00CMT0	Model SDSP71200TAN-000E0 SDSP71200TAN
Release Date 📅 May 2025	Release Date 📅 February 2026
* 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) 1st / 1746	Performance (Charts) n/a
Effective Value 85th / 336	Effective Value -
Price history View Details ►	Price history View Details ►
Price/GB $0.20	Price/GB $0.27
GB/$1 5.07	GB/$1 3.7
Series -	Series Optimus GX 7100
Capacity 4000 GB	Capacity 2000 GB
Interface PCIe Gen5 x4	Interface PCIe Gen4 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280
NAND Flash Type -	NAND Flash Type 3D NAND TLC
Max Sequential Read Up to 14900 MB/s	Max Sequential Read Up to 7250 MB/s
Max Sequential Write Up to 14000 MB/s	Max Sequential Write Up to 6900 MB/s
MTBF 1,750,000 Hours	MTBF 1,750,000 hours