Plextor M5 Pro Xtreme SSD Review (256GB) – 100,000 IOPS and Excellent Performance


ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.

Plextor Xtreme ATTO

Initial ATTO results are almost dead on for listed specifications, remembering of course that ATTO is the manufacturers favorite method of determining SSD specifications because it utilizes highly compressible data, yielding a more optimum result.


Crystal Disk Benchmark is used to measure read and write performance through sampling of highly compressible data (oFill/1Fill), or random data which is, for the most part, incompressible. In the M5 Pro Xtreme, we have provided the result with random data samples as both results were extremely similar.

Plextor Xtreme CDM

Crystal DiskMark scores traditionally drop just a bit when comparing to ATTO and this is the result of the testing sample now being primarily incompressible data, such data representing movies, music and photographs.  We have also noticed that the all important low 4k random write transfer speed has stepped up a bit since the M5 Pro test of a few weeks back.


Up until recently, AS SSD was the only benchmark created specifically for SSD testing and it uses incompressible data.  AS SSD, for the most part, gives us the worst case scenario in SSD transfer speeds because of its use of incompressible data and many enthusiasts like to AS SSD for their needs. Transfer speeds are displayed on the left with IOPS results on the right.

Plextor Xtreme AS SSD IOPSPlextor Xtreme AS SSD BenchAS SSD favored the Plextor M5 Xtreme in more ways than one.  Not only was the Total Score very encouraging, but also, 4k-64Thrd readvIOPS came just under the specifications of 100,000 IOPS. We also found the Copy Bench to be impressive as all three transfer speeds were in the 6Gbps range and the transfer times of the files was lightning fast.

Plextor Xtreme Copy Bench


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    Why is the 256GB OCZ Vector that was reviewed by this site missing from the Top 25 SATA 3 SSDs in the Vantage Chart?

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    Your link to Amazon actually shows the Extreme, with shipping, is a little more expensive than the Pro, which ships for free.


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    Bought it last weekend because of this review!! 😀

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    I think Les you should definitely update yours “SATA 3 SSD PCMark Vantage Point Total” in “SSD Benchmark Locker”.
    People could draw the wrong conclusions from the current results

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    Still looks like if a fella wants the overall fastest, the Samsung 840 Pro is it. What’s a few dollars?

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    I have to say, for the price point of this drive, it performs very well. I have been a longtime user of OCZ products as I have never had any problems with them and their Vector line is incredible. With that said, I am currently using the Plextor M5 Pro Xtreme and the performance is exactly as stated in this review. It is a solid drive and I recommend anyone who wants to save a bit of money and still have great performance to get this drive.

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    I’d like to follow up with another comment about this drive. I have continued to be impressed with this hard drive. After reviewing many different drives and testing their performance, this one still continues to impress. Let’s be realistic here. You take the top 5 best drives, which Plextor M5P is apart of, and put each one into identical setups you are highly unlikely to see any different in boot speed or how fast programs open and close. It is simply a great drive and a great price. Do yourself a favor, and purchase it. I couldn’t be happier.

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