SanDisk Extreme Pro & WD Black M.2 NVMe SSDs Review (1TB) – 3.4GB/s and 500K IOPS


Crystal Disk Benchmark is used to measure read and write performance through sampling of random data which is, for the most part, incompressible. Performance is virtually identical, regardless of data sample so we have included only that using random data samples.

This Crystal DiskMark result is from the SanDisk Extreme Pro and…at least typically… we might see performance drop a bit in comparing ATTO Disk Benchmark and Crystal DiskMark.  Not here though, this is an incredible Crystal DiskMark score.


The toughest benchmark available for solid state drives is AS SSD as it relies solely on incompressible data samples when testing performance. For the most part, AS SSD tests can be considered the ‘worst case scenario’ in obtaining data transfer speeds and many enthusiasts like AS SSD for their needs. Transfer speeds are displayed on the left with IOPS results on the right.






We didn’t quite reach listed specs of 500K read and 400k write IOPS but there is nothing wrong with this result whatsoever.  Performance remained very high, considering this benchmark is famous for knocking it down significantly in most cases, and our Copy Benchmark displayed some great data transfer results


Anvil’s Storage Utilities (ASU) is the most complete test bed available for the solid state drive today. The benchmark displays test results for, not only throughput but also, IOPS and Disk Access Times. Not only does it have a preset SSD benchmark, but also, it has included such things as endurance testing and threaded I/O read, write and mixed tests, all of which are very simple to understand and use in our benchmark testing.

Performance is decent with respect to Anvil, however, we would have like to see read IOPS just a bit higher.  When comparing the two SSDs, WD black came in with a total score of 16624 where the SanDisk Extreme pro resulted in 16348.


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 to 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


This may be a dated benchmark but we hardly ever see any of its tests exceed 2GB/s, but for RAID drive testing.  Both SSDs had virtually similar results with HDD6 exceeding 2GB/s six others above 1GB/s and HDD7 just below the 1GB/s mark.  This is an excellent result.

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