SANDISK Optimus GX PRO 850X 1TB Heatsink vs Optimus GX 7100 500GB SSD Comparison

SANDISK Optimus GX PRO 850X 1TB Heatsink and SANDISK Optimus GX 7100 500GB are both solid state drives with the same Interface (PCIe Gen4 x4), Form Factor (M.2-2280) and NAND Flash Type (3D NAND TLC). The main differences are in Capacity, Max Sequential Read and Max Sequential Write.

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SANDISK Optimus GX PRO 850X 1TB Heatsink	SANDISK Optimus GX 7100 500GB
Prices (Change region) In Stock $349.99 In Stock Free shipping $349.99 Out of Stock Free shipping $349.99 Out of Stock Free shipping $411.09 Show 1 more offers	Prices (Change region) In Stock Prime Exclusive $129.99 Last updated 45 minutes ago. In Stock $136.99 In Stock $136.99 In Stock Free shipping $159.99 In Stock $159.99 In Stock Free shipping $159.99 Show 3 more offers
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Brand SanDisk	Brand SanDisk
Model SDSP81100TAH-000E0 SDSP81100TAH	Model SDSP71500GAN-000E0 SDSP71500GAN
Release Date 📅 February 2026	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
Price history View Details ►	Price history View Details ►
Price/GB $0.35	Price/GB $0.26
GB/$1 2.86	GB/$1 3.85
Series Optimus GX PRO 850X	Series Optimus GX 7100
Capacity 1000 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
NAND Flash Type 3D NAND TLC	NAND Flash Type 3D NAND TLC
Cache No DRAM (SLC)	Cache -
Max Sequential Read Up to 7300 MB/s	Max Sequential Read Up to 6800 MB/s
Max Sequential Write Up to 6300 MB/s	Max Sequential Write Up to 5800 MB/s
MTBF 1,750,000 hours	MTBF 1,750,000 hours