OCZ Vertex 3.20 20nm SSD Review (240GB)


The SSD Review Benchmark SystemOur analysis today will be conducted with our Asus Z77 Premium Test Bench. Clicking on any pictures or benchmarks will bring up a more easily viewable high resolution image.

In testing, our main objective is to obtain results as pure and as accurate as possible and we want to ensure that no anomalies slip through. Simply put, we want to provide you with the absolute best results the tested hardware can provide. Repetition in testing is standard and, if necessary, we may conduct specific tests in Windows 7 safe mode to ensure the OS has little to no influence on the end result.

In order to validate and confirm our findings, testing is supported by industry accepted benchmark programs. All results are displayed through capture of the actual benchmark for better understanding of the testing process by the reader.

We would like to thank ASUS (P8Z77-V Premium), Intel (Core i7-3770K), Crucial (Ballistix), Corsair (H100) and Be Quiet (PSU/Fans) for supporting the build of our Z77 Premium Test Bench.


The software we will be using for today’s analysis is typical of many of our reviews and consists of ATTO Disk Benchmark, Crystal DiskMark, AS SSD, Anvil Storage Utilities and PCMark Vantage.  We rely on these as they each have a way of supporting one another yet, at the same time, adding a new performance benchmark to the total picture.  Much of the software is free and can be downloaded simply by clicking on the linked title.


All SSDs are not created equal and many new SSD enthusiasts realize that when they test their new drive to confirm specifications and ensure all is in order. SandForce controlled SSDs, as in the OCZ Vertex 3.20 SSD we are testing today, use compression techniques in storage whereas many others do not. This creates a bit of confusion when enthusiasts test the drive with random data through benchmarking programs such as AS SSD and Crystal DiskMark. The results seem to be lower than the listed specifications.

OCZ Vertex 3.20 SF-2281

An understanding of testing data samples helps as the LSI SandForce really only falls a bit short when examining high sequential test results using highly incompressible data, where in just about all cases, it is superior in it’s transfer of highly compressible data such as we might see in OS operations and software.  The truth is that the high sequential writes that might show the difference between SSDs is actually very rarely used by most users and pertains to only the transfer speed of large files where this speed can be reached. It is for this reason that all of our comparison testing is done through PCMark Vantage. PCMark Vantage HDD Suite simply provides evaluation results based on transfer speeds reached through typical user patterns. Vantage provides a better testing medium, in that, it sees through the typical synthetic benchmarks and provides us with ‘true to life’ results of the drive.


Crystal Disk Info provides some excellent information about the SSD itself to include its health, product information, power on information as well as the characteristics of the SSD. Having received this SSD brand new as a sample for review from OCZ, we can see that it has undergone standard burnin and quality tests even before reaching us, as it already contained 1TB host read/writes.

OCZ Vertex 3.20 Crystal DiskINFO


  1. Nice review as always Les! I can’t believe this kind of low performance in 2013!

    Well i guess we won’t see anything better than my 840pro until the next gen SATA…

    • Vector is faster than your 840 Pro especially with Vectors newly released FW 2.0 lol..

      • Nice catch! Any reviews backing that up? Because that 4k read of 30mb/s looks lower than the 40mb/s the 840 manages… lol!

      • so your basing the total speed of the drive on 1 metric? I heard the new firmware bumps that up actually but the vector kills the 840 pro is steady state performance as well as in writes..


        “The Samsung 830 Series was only recently unseated from the top of our
        overall performance rankings by the OCZ Vector. While the 840 Pro is an
        improvement over its predecessor, it’s not fast enough to match the

      • So what? I said we won’t see something faster. This tiny advantage in write speed is enough for you to call it faster? I whould hardly call it a tie as a number of benchmarks like Vantage, Pcmark07, even AnandTech’s Storage Bench which is mighty similar to our every day usage, suggest 840 is a little faster overall. That said, steady state is indeed Vectors strong point and i admit that although the latest firmware improved the 840 steady state perf, vector scores here.

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