SANDISK Optimus GX PRO 850X 4TB vs Silicon Power XD80 1TB SSD Comparison

SANDISK Optimus GX PRO 850X 4TB and Silicon Power XD80 1TB are both solid state drives with the same Form Factor (M.2-2280). The main differences are in Capacity and Interface.

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SANDISK Optimus GX PRO 850X 4TB	Silicon Power XD80 1TB
Prices (Change region) In Stock $1,329.99 In Stock Free shipping $1,329.99 In Stock $1,329.99 In Stock Free shipping $1,329.99 In Stock Free shipping $1,517.50 Show 2 more offers	Prices (Change region) Out of Stock Free shipping $68.99 Out of Stock Free shipping $186.66
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Brand SanDisk	Brand Silicon Power
Model SDSP81400TAN-000E0 SDSP81400TAN	Model SP001TBP34XD8005
Release Date 📅 February 2026	Release Date 📅 September 2021
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★☆ (2 reviews) Add a product review
Price history View Details ►	Price history View Details ►
Price/GB $0.33	Price/GB $0.07
GB/$1 3.01	GB/$1 14.49
Series -	Series XD80
Capacity 4000 GB	Capacity 1000 GB
Interface PCIe Gen4 x4	Interface PCIe Gen3 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280
NAND Flash Type -	NAND Flash Type TLC
Max Sequential Read -	Max Sequential Read Up to 3400 MB/s
Max Sequential Write -	Max Sequential Write Up to 3000 MB/s
MTBF -	MTBF 2,000,000 hours