SANDISK Optimus GX PRO 850X 4TB vs Silicon Power UD85 4TB SSD Comparison

SANDISK Optimus GX PRO 850X 4TB and Silicon Power UD85 4TB are both solid state drives with the same Capacity (4000 GB), Interface (PCIe Gen4 x4) and Form Factor (M.2-2280).

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SANDISK Optimus GX PRO 850X 4TB	Silicon Power UD85 4TB
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) Price not available
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Brand SanDisk	Brand Silicon Power
Model SDSP81400TAN-000E0 SDSP81400TAN	Model SP04KGBP44UD8505
Release Date 📅 February 2026	Release Date -
* 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 $0.33	Price/GB -
GB/$1 3.01	GB/$1 -
Capacity 4000 GB	Capacity 4000 GB
Interface PCIe Gen4 x4	Interface PCIe Gen4 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280