Samsung 950 PRO 512GB M.2 vs SANDISK Optimus GX PRO 850X 1TB SSD Comparison

Samsung 950 PRO 512GB M.2 and SANDISK Optimus GX PRO 850X 1TB are both solid state drives with the same Form Factor (M.2-2280). The main differences are in Capacity and Interface.

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Samsung 950 PRO 512GB M.2	SANDISK Optimus GX PRO 850X 1TB
Prices (Change region) In Stock Free shipping $499.99	Prices (Change region) In Stock $329.99 In Stock Free shipping $329.99 In Stock Free shipping $329.99 Out of Stock $329.99 Out of Stock Free shipping $387.88 Show 2 more offers
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Pangoly Score (How do we rate?) 95	Pangoly Score (How do we rate?) -
Brand Samsung	Brand SanDisk
Model MZ-V5P512BW	Model SDSP81100TAN-000E0 SDSP81100TAN
Release Date 📅 October 2015	Release Date 📅 February 2026
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews ★★★★★ (104 reviews) Add a product review	User reviews Add a product review
Performance (Charts) 109th / 1746	Performance (Charts) n/a
Effective Value 215th / 336	Effective Value -
Price history View Details ►	Price history View Details ►
Price/GB $0.98	Price/GB $0.33
GB/$1 1.02	GB/$1 3.03
Series 950 PRO	Series -
Capacity 512 GB	Capacity 1000 GB
Interface PCIe Gen3 x4	Interface PCIe Gen4 x4
NVME Yes	NVME Yes
Form Factor M.2-2280	Form Factor M.2-2280
SSD Controller Samsung UBX	SSD Controller -
NAND Flash Type Samsung V-NAND	NAND Flash Type -
Cache 512MB	Cache -
Max Sequential Read Up to 2500 MB/s	Max Sequential Read -
Max Sequential Write Up to 1500 MB/s	Max Sequential Write -
MTBF 1,500,000 hours	MTBF -