AS SSD is a great free tool designed just for benching Solid State Drives. It performs an array of sequential read and write tests, as well as random read and write tests with sequential access times over a portion of the drive.
AS SSD includes a sub suite of benchmarks with various file pattern algorithms but this is difficult in trying to judge accurate performance figures.
Again, the MX300 2TB drive shows good 4K write performance at both deep and shallow queue depths which is more than can be said for the 4K read performance at a QD of 1.