SANDISK Optimus GX PRO 850X 4TB vs VisionTek Pro 1TB QLC SSD Comparison

The main differences between SANDISK Optimus GX PRO 850X 4TB and VisionTek Pro 1TB QLC are in Capacity, Interface, NVME and Form Factor.

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SANDISK Optimus GX PRO 850X 4TB	VisionTek Pro 1TB QLC
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 $131.18 Out of Stock Free shipping $135.99 Out of Stock $149.99
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Brand SanDisk	Brand VisionTek
Model SDSP81400TAN-000E0 SDSP81400TAN	Model 901369
Release Date 📅 February 2026	Release Date 📅 May 2022
* 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 $0.13
GB/$1 3.01	GB/$1 7.62
Series -	Series Pro
Capacity 4000 GB	Capacity 1000 GB
Interface PCIe Gen4 x4	Interface SATA 6 Gb/s
NVME Yes	NVME No
Form Factor M.2-2280	Form Factor 2.5"
SSD Controller -	SSD Controller Silicon Motion SM2259
NAND Flash Type -	NAND Flash Type 3D QLC
Max Sequential Read -	Max Sequential Read Up to 560 MB/s
Max Sequential Write -	Max Sequential Write Up to 505 MB/s
MTBF -	MTBF 1,500,000 hours