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Plextor M6e 256GB PCIe SSD Review - Breaking the Chains of SATA III

By: Chris Ramseyer | PCIe in Storage | Posted: Mar 10, 2014 2:06 pm
TweakTown Rating: 93%Manufacturer: Plextor

HD Tune Pro


Version and / or Patch Used: 4.00

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HD Tune is a Hard Disk utility which has the following functions:


Benchmark: measures the performance

Info: shows detailed information

Health: checks the health status by using SMART

Error Scan: scans the surface for errors

Temperature display


HD Tune Pro gives us accurate read, write, and access time results and, for the last couple of years, has gained popularity amongst reviewers. It is now considered a must have application for storage device testing.





Most users will find the largest gains in sequential performance with PCIe SSDs. As we see here, the M6e takes sequential reads to a new level. The drive has eight NAND flash packages, so the parallelism is very high in this drive. The SanDisk A110 M.2 drive we tested previously has just four packages, and the M6e offers around 100 MB/s extra sequential read performance.




The 256 GB and 512 GB M6e models deliver higher sequential write performance than is possible with SATA III. The M6e 128 GB model only writes at a maximum of 335 MB/s. That means the two largest capacity sizes put SATA III drives to shame.


HD Tach - Sequential Write Performance after Random Writes




Plextor uses an aggressive garbage collection scheme, and, at times, it can diminish performance. After hitting the M6e 256GB with a light load of random writes, the drive dipped down to 25 MB/s at one point in a sequential test.

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