Plextor M6e Black Edition SSD Review (256GB) – Back in Black!


The SSD Review uses benchmark software called PCMark Vantage x64 HDD Suite to create testing scenarios that might be used in the typical user experience. There are eight tests in all and the tests performed record the speed of data movement in MB/s to which they are then given a numerical score after all of the tests are complete. The simulations are as follows:

  • Windows Defender In Use
  • Streaming Data from storage in games such as Alan Wake which allows for massive worlds and riveting non-stop action
  • Importing digital photos into Windows Photo Gallery
  • Starting the Vista Operating System
  • Home Video editing with Movie Maker which can be very time consuming
  • Media Center which can handle video recording, time shifting and streaming from Windows media center to an extender such as Xbox
  • Cataloging a music library
  • Starting applications


 PCMark Vantage gives us our first look into real-world workload performance. The Plextor M6e Black Edition returned a Total Point Score of 92,498 with a high transfer speed of 599MB/s while testing in Windows Media Center. During most of the other tests, performance was in the SATA 6Gb/s range. The worst being in the adding music to Windows Media Player section of the test at 287MB/s. Overall however, the total performance score puts it well above any SATA 6Gb/s drive we have tested thus far.

M6e Black Edition 256GB PCMark Vantage



For our last benchmark, we have decided to use PCMark 8 Extended Storage Workload in order to determine steady state throughput of the SSD.  This software is the longest in our battery of tests and takes just under 18 hours per SSD.  As this is a specialized component of PCMark 8 Professional, its final result is void of any colorful graphs or charts typical of the normal online results and deciphering the resulting excel file into an easily understood result takes several more hours.

There are 18 phases of testing throughout the entire run, 8 runs of the Degradation Phase, 5 runs of the Steady State Phase and 5 runs of the Recovery Phase.  In each phase, several performance tests are run of 10 different software programs; Adobe After Effects, Illustrator, InDesign, Photoshop Heavy and Photoshop Light, Microsoft Excel, PowerPoint and Word, as well as Battlefield 3 and World of Warcraft to cover the gaming element.

  • PRECONDITIONING -The entire SSD is filled twice sequentially with random data of a 128KB file size.  The second run accounts for overprovisioning that would have escaped the first;
  • DEGRADATION PHASE – The SSD is hit with random writes of between 4KB and 1MB for 10 minutes and then a single pass performance test is done of each application.  The cycle is repeated 8 times, and with each time, the duration of random writes increases by 5 minutes;
  • STEADY STATE PHASE – The drive is hit with random writes of between 4KB and 1MB for 45 minutes before each application is put through a performance test.  This process is repeated 5 times;
  • RECOVERY PHASE – The SSD is allowed to idle for 5 minutes before and between performance tests of all applications.  This is repeated 5 times which accounts for garbage collection; and
  • CLEANUP – The entire SSD is written with zero data at a write size of 128KB

In reading the results, the Degrade and Steady State phases represent heavy workload testing while the recovery phase represents typical consumer light workload testing.


As you can see, performance is recorded in terms of Bandwidth and Latency. Bandwidth (or throughput) represents the total throughput the drive is able to sustain during the tests during each phase. Latency, at least for the purposes of PCMark 8, takes on a different outlook and for this, we will term it ‘Total Storage latency’.  Typically, latency has been addressed as the time it takes for a command to be executed, or rather, the time from when the last command completed to the time that the next command started.  This is shown below as ‘Average Latency’.

PCMark 8 provides a slightly different measurement, however, that we are terming as ‘Total Storage Latency’.  This is represented as being the period from the time the last command was completed, until the time it took to complete the next task; the difference of course being that the execution of that task is included in ‘Total Storage Latency’.  For both latency graphs, the same still exists where the lower the latency, the faster the responsiveness of the system will be.  While both latency charts look very similar, the scale puts into perspective how just a few milliseconds can increase the length of time to complete multiple workloads.

For a more in-depth look into Latency, Bandwidth, and IOPS check out our primer article on them here.


These results show the total average bandwidth across all tests in the 18 phases. In this graph the higher the result the better.

Plextor M6e Black Edition PCMark 8 Average Bandwidth


These results show the average access time during the workloads across all tests in the 18 phases. In this graph the lower the result the better.

Plextor M6e Black Edition PCMark 8 Average Latency


These results show the total access time across all tests in the 18 phases. In this graph the lower the result the better.

Plextor M6e Black Edition PCMark 8 Total Latency

The first thing we notice in our PCMark 8 testing is how much more consistent the M6e Black Edition’s results are compared to the standard drive. And not only is it more consistent, it also performs much better. Two things are the most likely candidates for this. One, the heat sink. During this test the drive is bombarded with writes over an 18hr span, it is given almost no rest, which in turn results in high power usage and high heat output. The standard M6e without the heat sink seems to show less consistent performance possibly due to thermal throttling by the controller. And two, the firmware has been revised, the M6e Black Edition features firmware v1.05 while the standard M6e features v1.04, so that could be at play as well.

Overall, when looking at its performance here we can see that while it does not perform as fast as a top tiered SATA drive during heavy workloads, we can see that once it hits standard light workloads that it performs very similarly. This also goes to show that most tasks don’t fully rely on sequential performance, what matters more is access times and low queue depth speeds for real-world desktop usage.


  1. blank

    I like the asthetics of this and wondered if the XP941 would work as it normally does (G2 X4) if the drives were swapped?

    • blank

      The drive in this adapter is not a PCIe 2×4, but rather 2×2. We can check this out in the next week or so when it is being reviewed for Tech X.

      • blank

        Awesome. Would love to find out as I’m thinking about purchasing the 128GB model just for the adaptor/housing. I’m also waiting to see how the Kingston HyperX Predator version stacks up.

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