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Plextor M5 Pro Xtreme 256GB / M5S 256GB SSD review: one is cheap, the other faster?

One is cheaper, but is the other one faster?


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 the M5 Pro Xtreme scores 1.094 points, compared to the 1,084 points of the M5 Pro. Not a big difference. The M5S is slightly faster again than the M3. 887 points is good, but fairly average by now.

4k blocks read - single threaded

4k blocks read - 64 threads

Sequential read

4k blocks write - single threaded


4k blocks write - 64 threads

Sequential write

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