OWC Mercury Electra 6G 250GB vs SANDISK Optimus GX PRO 850X 1TB SSD Comparison

The main differences between OWC Mercury Electra 6G 250GB and SANDISK Optimus GX PRO 850X 1TB are in Capacity, Interface, NVME and Form Factor.

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OWC Mercury Electra 6G 250GB	SANDISK Optimus GX PRO 850X 1TB
Prices (Change region) Out of Stock Free shipping $28.79 Out of Stock Free shipping $34.99 Out of Stock Free shipping $36.99 Out of Stock Free shipping $99.88 Out of Stock $99.88 Show 2 more offers	Prices (Change region) In Stock Free shipping $294.99 In Stock $294.99 In Stock Free shipping $294.99 In Stock Free shipping $294.99 In Stock $329.99 Show 2 more offers
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Brand OWC	Brand SanDisk
Model OWCS3D7E6G250	Model SDSP81100TAN-000E0 SDSP81100TAN
Release Date 📅 November 2017	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 $0.40	Price/GB $0.29
GB/$1 2.5	GB/$1 3.39
Series Mercury Electra	Series Optimus GX PRO 850X
Capacity 250 GB	Capacity 1000 GB
Interface SATA 6 Gb/s	Interface PCIe Gen4 x4
NVME No	NVME Yes
Form Factor 2.5"	Form Factor M.2-2280
NAND Flash Type MLC	NAND Flash Type 3D NAND TLC
Max Sequential Read up to 522MB/s	Max Sequential Read Up to 7300 MB/s
Max Sequential Write up to 463MB/s	Max Sequential Write Up to 6300 MB/s
MTBF -	MTBF 1,750,000 hours