Plextor PX-128M1S 128GB SSD - HDTune, IOMeter and Final Thoughts

Article Index
Plextor PX-128M1S 128GB SSD
Features and Specifications
Inside the Plextor SSD
SSD Testing Info and Benchmarks
Crystal DiskMark and HDTach
HDTune, IOMeter and Final Thoughts

Performance - HDTune:

HD Tune Pro is a relatively new benchmark for us here at BCCHardware as we don't typically do a lot of storage reviews.  This benchmark now allows random read and write tests to be performed, and the results are displayed on a very handy chart.  HDTune tests 512 byte, 4KB, 64KB, 1MB and Random sizes of data over the disk.  The results displayed below show total operations per second as well as average access time and average speed.  This is quite informative as it shows how the drive responds to different sizes of data - not only in transfer rate, but also in operations/sec, access time and more.

HDTune Read Performance
HDTune Read Performance
HDTune Write Performance
HDTune Write Performance


HDTune shows that the drive is quite capable at reaching its rated read speed, but once again the rated write speed falls short.  Also, 512 byte and 4K writes are very slow.  Once it gets above that, the performance picks up, but small files are not a strong point on this drive.


Performance - IOMeter:

Our last benchmark today for the Plextor SSD is IOMeter and this benchmark goes a long way to test out the Input/Output subsystem.  This benchmark is used to measure the performance of the drive under a very controlled set of circumstances.  The output is in total I/O per sec, average I/O response, maximum I/O response and MB/sec output.

IOMeter Chart

While the Plextor can't keep up in terms of Total I/O per second or Total MB/sec, it has very good response times as a redeeming feature.


Final Thoughts:

Plextor has been well known over the years for the high-quality optical drives.  They've also ventured into video capture and storage over the years, but the PX-128M1S is their first SSD.  While they once again focus on quality and drive integrity without performance degradation, I can't help but think they should have used a higher performance controller to keep up with the competition.  It may not be fair to compare the Plextor drive with other companies products that focus on "clean" speed more than reliability, but the truth is that people want the fastest product for the lowest price.

So how do we accurately and fairly score the Plextor PX-128M1S?  Can we fairly compare it and rate it when based on other drive technology?  I think we have to ultimately score the performance based on what Plextor claims it is capable of, and perhaps value in a broader sense of what other drives are available and how they perform.  One thing Plextor does is add Acronis True Image (~$50 value) to the mix and that helps improve its overall value.  That being said, I still believe that there are better choices if you are all about blistering fast SSDs.



  • Well designed/finished drive
  • 64MB cache keeps response time low. 
  • Drive performs consistently if NAND is "clean" or "dirty"
  • Exceeds rated read performance
  • Acronis True Image is handy for system migration



  • Priced same as a high-performance drive
  • 3 year warranty seems weak compared to other 5 year & 10 year warranties
  • Doesn't reach rated write speed in any tests




I'd like to thank Plextor for sending over this SSD for us to review.  I just can't help but feel that with other drives supporting TRIM and other "Garbage Collection" options, the performance of SSDs continues to remain the same in the long term and in order to compete, this drive needs better performance.

Please post your comments and questions in the forum at the "Comments" link below.