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.
Although designed as a cache drive, when tested with the AS-SSD benchmark the SNV3400-400G's read score of 1428 was good enough to fill the 5th slot in our results chart for 400GB-500GB class drives.