As is the way with a surprising number of its products, Samsung’s SSD lineup is developed entirely by the various arms of the massive Korean company. It not only features its own in-house controller chip in the form of the MDX controller, which has three ARM cores inside it, but it also has its own 22nm MLCl NAND memory inside. The main difference between the Pro and the standard 840 comes down to the NAND – the standard version uses a new, cheaper triple layer cell (TLC) memory design.
The in-house technology makes the Samsung 840 Pro an excellent performer, and one of the best SSDs that we have tested. In AS SSD we saw 521MB/s reads and 506MB/s writes in the sequential tests, and 36MB/s reads and 123MB/s writes in the 4K tests.
This adds up to one very tempting SSD, and the pricetag of $250 for the 256GB version is quite reasonable for a premium drive. This alone makes it worth checking out.