I upgraded my 2012 MBP with this SSD, it is now so much faster!

A tiny bit slower than the smaller 256GB Samsung Pro drive I replaced, however, not so slow it will be noticed other than in a benchmark. It is also a little slower than my Samsung 1TB EVO, however, with large files the EVO slows down a great deal after the buffer is full; the Pro does not suffer...

Samsung SSD 860 PRO Arrives With New 64-Layer MLC NAND and MJX Controller Samsung released the 850 PRO way back in July 2014 (our review) and the series was quickly found to be an ideal drive for PC gamers, enthusiasts and storage snobs needing a SATA SSD.