SANDISK Optimus GX PRO 850X 8TB Heatsink vs OWC Mercury Electra 6G 250GB SSD Comparison

The main differences between SANDISK Optimus GX PRO 850X 8TB Heatsink and OWC Mercury Electra 6G 250GB are in Capacity, Interface, NVME and Form Factor.

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SANDISK Optimus GX PRO 850X 8TB Heatsink	OWC Mercury Electra 6G 250GB
Prices (Change region) In Stock $2,699.99 In Stock Free shipping $2,699.99 In Stock Free shipping $2,699.99 In Stock Free shipping $2,766.24 Show 1 more offers	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
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Brand SanDisk	Brand OWC
Model SDSP81800TAH-000E0 SDSP81800TAH	Model OWCS3D7E6G250
Release Date 📅 February 2026	Release Date 📅 November 2017
* 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 $0.34	Price/GB $0.40
GB/$1 2.96	GB/$1 2.5
Series Optimus GX PRO 850X	Series Mercury Electra
Capacity 8000 GB	Capacity 250 GB
Interface PCIe Gen4 x4	Interface SATA 6 Gb/s
NVME Yes	NVME No
Form Factor M.2-2280	Form Factor 2.5"
NAND Flash Type 3D NAND TLC	NAND Flash Type MLC
Max Sequential Read Up to 7200 MB/s	Max Sequential Read up to 522MB/s
Max Sequential Write Up to 6600 MB/s	Max Sequential Write up to 463MB/s
MTBF 1,750,000 hours	MTBF -