SANDISK WD Blue SN5100 4TB vs Optimus GX 7100 4TB SSD Comparison

SANDISK WD Blue SN5100 4TB and SANDISK Optimus GX 7100 4TB are both solid state drives with the same Capacity (4000 GB), Interface (PCIe Gen4 x4) and Form Factor (M.2-2280). The main differences are in NAND Flash Type, Max Sequential Read and MTBF.

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SANDISK WD Blue SN5100 4TB	SANDISK Optimus GX 7100 4TB
Prices (Change region) In Stock Free shipping $534.49 In Stock $538.59 Last updated 51 minutes ago. In Stock Free shipping $599.99	Prices (Change region) In Stock $869.99 In Stock Free shipping $869.99 In Stock $869.99 In Stock Free shipping $869.99 In Stock $869.99 Last updated 51 minutes ago. Out of Stock + $7.85 Shipping $869.99 Show 3 more offers
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Brand SANDISK	Brand SanDisk
Model WDS400T5B0E-00CPE0 WDS400T5B0E	Model SDSP71400TAN-000E0 SDSP71400TAN
Release Date 📅 September 2025	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 $0.13	Price/GB $0.22
GB/$1 7.48	GB/$1 4.6
Series -	Series Optimus GX 7100
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
NAND Flash Type QLC 3D CBA NAND	NAND Flash Type 3D NAND TLC
Cache No DRAM (HMB)	Cache -
Max Sequential Read Up to 6900 MB/s	Max Sequential Read Up to 7000 MB/s
Max Sequential Write Up to 6700 MB/s	Max Sequential Write Up to 6700 MB/s
MTBF 1.75 Million hours	MTBF 1,750,000 hours