Western Digital SN850 2TB vs SANDISK Optimus GX PRO 850X 1TB SSD Comparison

Western Digital SN850 2TB and SANDISK Optimus GX PRO 850X 1TB are both solid state drives with the same Interface (PCIe Gen4 x4) and Form Factor (M.2-2280). The main differences are in Capacity, NAND Flash Type, Max Sequential Read and Max Sequential Write.

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Western Digital SN850 2TB	SANDISK Optimus GX PRO 850X 1TB
Prices (Change region) In Stock Free shipping $344.38 In Stock $400.00 Last updated 56 minutes ago.	Prices (Change region) In Stock $294.99 In Stock Free shipping $294.99 In Stock $294.99 In Stock Free shipping $294.99 Out of Stock + $9.10 Shipping $301.69 Show 2 more offers
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Brand Western Digital	Brand SanDisk
Model WDS200T1X0E	Model SDSP81100TAN-000E0 SDSP81100TAN
Release Date 📅 October 2020	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
Performance (Charts) 35th / 1746	Performance (Charts) n/a
Effective Value 67th / 336	Effective Value -
Price history View Details ►	Price history View Details ►
Price/GB $0.17	Price/GB $0.29
GB/$1 5.81	GB/$1 3.39
Series BLACK SN850 NVMe	Series Optimus GX PRO 850X
Capacity 2000 GB	Capacity 1000 GB
Interface PCIe Gen4 x4	Interface PCIe Gen4 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280
SSD Controller WD/SanDisk NVMe G2	SSD Controller -
NAND Flash Type 3D NAND	NAND Flash Type 3D NAND TLC
Max Sequential Read Up to 7000 MB/s	Max Sequential Read Up to 7300 MB/s
Max Sequential Write Up to 5100 MB/s	Max Sequential Write Up to 6300 MB/s
MTBF 1.75M Hours	MTBF 1,750,000 hours