Short for DirectX diagnostics, DxDiag is a Microsoft tool included with DirectX that allow you to view system information and DirectX information relating to your video card and sound card. This tool is helpful when needing to troubleshoot driver related issues being encountered by DirectX.

DxDiag overview

Below, is a picture of the DirectX Diagnostic Tool window. As seen in the picture, DxDiag has system, display, sound, and input information tabs. These tabs allow you to save all DirectX information to a text file by clicking the Save All Information button at the bottom of the window.

  • DxDiag overview
  • How to run DxDiag
  • DxDiag commands
  • Example of dxdiag command
  • Related DirectX pages.
  • DirectX help and support.

How to run DxDiag

To run DxDiag, click Start, and in the run line, type dxdiag and press Enter.

DxDiag commands

The dxdiag also has a few command options, as shown in the below syntax.

dxdiag [/dontskip] [/whql:on] [/whql:off] [/64bit] [/x outfile] [/t outfile]

Example of dxdiag command

dxdiag /t dxdiag_output.txt

In the above example, DxDiag would save the output into the Users folder.

Computer abbreviations, DirectX, Software terms

  • DirectX Diagnostic or DxDiag shows wrong total memory.
  • DirectX help and support.