CrystalDiskMark

Main Window

Main Window

How to start Benchmark

1. Select Number of Test Runs, Test Size and Test Drive.

2. Click "All" button (or Seq, 512K, 4K, 4K QD32 button) to start Benchmark.

Test Types

All : All Test (Seq, 512K, 4K, 4K QD32)
Seq : Sequential Read/Write Test (Block Size = 1024KB)
512K : Random Read/Write Test (Block Size = 512KB)
4K : Random Read/Write Test (Block Size = 4KB)
4K QD32 : Random Read/Write Test (Block Size = 4KB, Queue Depth = 32) for NCQ&AHCI

Number of Test Runs

1~9. Default value is 5.

Test Size

50MB, 100MB, 500MB, 1000MB, 2000MB and 4000MB.

Default value is 1000MB. But it may be too large for low speed storage (USB memory etc...), so you should choose small size.

Test Drive

C:\, D:\ and etc... CrystalDiskMark is required Drive Letter for benchmark.