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.
We are using the 2.0 version for NVMe drive testing.
The 1774 read and 1935 write scores in ASSSD place the drive firmly in the middle of the pack of the NVMe drives we have tested.