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.
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.
How to run DxDiag
To run DxDiag, click Start, and in the run line, type dxdiag and press Enter.
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]
|/x outfile||Silently save XML information to <outfile> and quit.|
|/t outfile||Silently save txt information to <outfile> and quit.|
|/dontskip||Don't bypass any diagnostics due to previous crashes in DxDiag.|
|/whql:on||Allow dxdiag to check for WHQL digital signatures.|
|/whql:off||Do not allow dxdiag to check for WHQL digital signatures.
Note: Checking for WHQL digital signatures may connect via Internet to update WHQL certificates.
|/64bit||Launch 64-bit dxdiag.|
Example of dxdiag command
dxdiag /t dxdiag_output.txt
In the above example, DxDiag would save the output into the Users folder.