Samsung tempted value-oriented enthusiasts in December with its 'V-NAND'-based 850 Evo series. Equipped with 3D TLC NAND, which allows Samsung to stack layer upon layer of transistors, the design improved density, endurance, performance and lowered production costs. Today we have two similarly new drives that focus on different form factors. The mSATA version will appeal to compact PC users, while the M.2 will be more sought after by power users.