From the manufacturer
The SSD you trust
The newest edition to one of the world’s top selling* SATA SSD series, the Samsung PM851 is specially designed to enhance performance of mainstream PCs and laptops. With the latest V-NAND technology, this fast and reliable SSD comes in a wide range of compatible form factors and capacities.
*Sources: NPD (US data from Jan. 2015 to Oct. 2017)
Speeds are consistent, even under heavy workloads and multi-tasking allowing for faster file transfer.