Samsung 256GB 850 Pro SSD

What is V-NAND and how does it differ from existing technology?
Samsung's flash memory is fabricated using an innovative 3D V-NAND architecture, which stacks cell layers on top of one another rather than trying to decrease the cells' length and width to fit today's shrinking form factors. The result is higher density and higher performance using a smaller footprint and a breakthrough in overcoming the density limits of conventional planar NAND architecture.

Boost performance with an industry-leading 3D V-NAND SSD
Powered by Samsung's cutting-edge 3D V-NAND technology, the NAND flash memory delivers the ultimate in read and write performance in both sequential and random aspects. This is especially impressive in the 128 GB model* that outperforms similar models on the market by more than 80 MB/s in write speed.

* 850 PRO 128 GB Sequential Write speed: 470 MB/s

Shift into high gear with the enhanced RAPID mode
You can kick up the read/write performance on every capacity when you need it with the RAPID mode. Just like shifting gears in a car, Magician software gives you the option to enhance performance by processing data on a system level using free PC memory (DRAM) as a cache, providing 1.8 times faster performance in the RAPID mode*.

* PCMark Vantage score (512 GB): 53K < 97K(in RAPID mode)