Measures Sequential, 512K, 4K and 4KQD32 read/write speeds

Fuss free simple benchmarking utility...

CrystalDiskMark allows you to benchmark any type of disk drive. The PC utility requires minimal configuration and out of the box reports several common speed measurements: Read and write speeds for Sequential (large contiguous files) , 512 KB (medium) and 4 KB (small) files. Additionally it reports read/write speeds for 4KB files whilst the drive is under load with 32 simultaneous requests. The results are displayed in a simple to use graphic. The software is freely available as either an install package or as a standalone application.

How to use CrystalDiskMark to benchmark your own drive

  • Download and launch the utility
  • Chose a drive with the dropdown on the upper right
  • Click "All"
  • Let the tests run and watch the various speed fields populate
  • After multiple runs, CrystalDiskMark will take best reading rather than the average


 Crystaldiskmark Screenshot

Download and try it for yourself, it's freely available at the below link.

Added 10 years ago.

Excellent (edit your comment) Add link

22 months ago.


provides 8 measures; however, these depend on selected file size and block, hence not comparable: no common parameters. Other benchmark tools use standardized parameter sets.—Sep '14


4 years ago.

I have just found this site so I am new to this


6 years ago.

CrystalDiskMark is a sort of a de-facto standard when comparing the performance of USB sticks.


2 years ago.

Using settings of 1:50Mb & E: [external drive] 0/116Gb I had results of READ: 40.47; 0.697; 40.06; 0.588. Write: 39.90; 1.908; 39.43, 1.787. Can somebody translate the to FAST, SLOW, INDIFFERENT for me please. I have an HP laptop model 15-ac676TU with Intel Core i7-4510U CPU at 2.00 GHz 2.60 GHz


10 years ago.

Very good

10 years ago.

Great disk benchmarking utility with a clear and simple graphical display. Thanks to this, there are more screenshots from this benchmark on the web than any other. It's free, simple and has been around for ages.


3 years ago.

Amazing drive benchmark.


24 months ago.

Genuinely one of the best R/W benchmarking platforms out there.


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