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Title: DxDiag  
Author: World Heritage Encyclopedia
Language: English
Subject: DirectX, Hardware mixing
Publisher: World Heritage Encyclopedia


DirectX Diagnostics
A component of Microsoft Windows
DxDiag from DirectX 6.1 ( running on
Windows 95 and DirectX 1.0
Included with Windows 98 Second Edition, all other Windows versions with DirectX 6.0 or later
Replaces DXInfo
Related components

DxDiag ("DirectX Diagnostics") is a diagnostics tool used to test DirectX functionality and troubleshoot video- or sound-related hardware problems. DirectX Diagnostic can save text files with the scan results. These files are often posted in tech forums or attached to support emails in order to give support personnel a better idea of the PC the requester is using in case the error is due to a hardware failure or incompatibility.

DxDiag is located in %SystemRoot%\System32.[1] Starting from Windows Vista, DxDiag only shows information; it is no longer possible to test the hardware and the various DirectX components.[2]


The System tab displays the current DirectX version, the computer's hostname, the operating system's version, information on the system BIOS, and other data. The DirectX Files tab displays information about the versions of specific DirectX system files, which are portable executables or dynamic-link libraries (DLLs).

DxDiag displays information about the current display settings and the video hardware on the Display tab. If the computer has more than one monitor, then DxDiag will display a separate tab for each monitor. This tab can disable DirectDraw, Direct3D, and/or AGP Texture Acceleration for troubleshooting purposes. If the installed display driver has passed Windows Hardware Quality Labs testing, DxDiag will display this result on the right side of the window.

The Music tab displays information about the computer's MIDI settings, and lists different music-related software and hardware on your computer. The Input tab, displays information about input devices installed in the computer such as keyboards and mice. It will also attempt to detect problems with these devices. DxDiag also displays information about the installed DirectPlay Service Provider.

It is possible to create chat rooms with DxDiag that can be accessed by other computers, as long as anyone attempting to join knows the IP address of the host computer.

In Windows XP Professional x64 edition, Windows Vista x64 edition, and Windows 7 x64 edition, two versions of DxDiag are included, a native 64-bit version and a 32-bit version.


  1. ^ "DirectX: Description of the DirectX Diagnostic Tool". Microsoft. 2007-05-07. Retrieved 2008-03-03. 
  2. ^ XNA Framework Goals
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