AS SSD (incompressible data)
AS SSD uses incompressible data. SSDs with a SandForce controller (like the OCZ Vertex 3, Intel SSD 520, and many others) can therefore not take advantage of the built-in compression tricks.
AS SSD performs both read and write tests. First it tests 4kB data blocks with one command at a time, then it tests 4kB data blocks with 64 simultaneous commands. Lastly, it performs a sequential read and write test, which measures how well the SSD works with very large files. Based on all the tests, AS SSD also gives an aggregate score.
In AS SSD we get a total score of 891 points which makes it the fastest Marvell-based SSD that we've tested. Only the OCZ Vertex 4 had a higher score. Particularly the single-threaded 4k read speed and the sequential write speed are excellent on the Plextor M3 Pro.