The next software we used was the ATTO Disk Benchmark. The tool measures storage systems performance with various transfer sizes and test lengths for reads and writes. The benchmark performs file transfers ranging from 0.5 KB to 8192 KB. ATTO can be adjusted to do overlapped I/O, in a variety of queue depths. We tested the SSD using the benchmark's default settings, using 256KB file length performance and QD4. ATTO probably gives the most accurate results for compressible read and write data.

As you see above the drive's reading and writing performance with compressible files was pretty stable with files larger than 128KB. The average reading speed was about 539 MB/s and the writing speed was 426 MB/s.

However, the drive is suffering a bit in the sequential reading of small files (4KB or smaller) staying behind the competition:

On the other hand, the Crucial M500 drive was very fast when it was writing such small, compressible files:

Going further to larger file transfers, the M500 drive is not the fastest you can find for reading and writing, although it does not fall short our expectations: