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DirectX: Description of the DirectX Diagnostic Tool
Article ID: 190900 - View products that this article applies to.
This article was previously published under Q190900
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This article describes the DirectX Diagnostic Tool (Dxdiag.exe) included with Microsoft DirectX.
The DirectX Diagnostic Tool is designed to help you troubleshoot DirectX-related issues.
The default installation folder for Dxdiag.exe for Microsoft Windows 2000 and Microsoft Windows XP is:
C:\Windows\System32To start the DirectX Diagnostic Tool, click Start, click Run, type dxdiag in the Open box, and then click OK.
The following list contains a description of each tab in the DirectX Diagnostic Tool dialog box.
SystemThe System tab provides system information about your computer and specifies the version of DirectX that is installed on your computer.
DirectX FilesThe DirectX Files tab lists the file name and the version number for each DirectX file that is installed on your computer, as well as the file name and the version number of many common files that are used by games that are running under DirectX.
If the DirectX Diagnostic Tool detects a problem with a DirectX file, a warning message appears in the Notes box.
Display'N'('N' is the number of the physical display device.)
The Display tab lists your current display settings, and allows you to disable DirectDraw, Direct3D, and AGP Texture Acceleration. This tab also allows testing of DirectDraw and Direct3D. Passing these tests indicates that the DirectX Graphics runtime files are installed and operating correctly. It is not a comprehensive test of your computer's display hardware.
The Display tab also lists your device's available memory and can tell you if your video driver has passed Microsoft's Windows Hardware Quality Labs (WHQL) testing regimen by checking whether the WHQL Logo'd is set to Yes or No.
Note Dxdiag.exe cannot report memory that is in use at the time that it starts. Therefore, it is not uncommon to see less memory reported than your video card actually has.
If the DirectX Diagnostic Tool detects a problem with your display settings, a warning message appears in the Notes box.
SoundThe Sound tab displays your current sound settings, and enables you to test DirectSound. The Sound tab can tell you if your audio driver is "Signed" - which indicates that it has passed Microsoft's Windows Hardware Quality Labs testing regimen.
The Hardware Sound Acceleration Level slider is used to correct audio glitches that might be caused by some audio drivers. Reducing the acceleration by one notch and re-testing the application is the best way to troubleshoot DirectSound audio problems. Lowering the Hardware Sound Acceleration Level from the default setting of "full acceleration" may disable advanced audio processing techniques, such as 3D spatialization from functioning.
If the DirectX Diagnostic Tool detects a problem with your sound settings, a warning message is displayed in the Notes box.
MusicThe Music tab displays your current MIDI settings, and enables you to test the DirectMusic component of DirectX.
If the DirectX Diagnostic Tool detects a problem with DirectMusic, a warning message is displayed in the Notes box.
Note DirectMusic is a new component included in DirectX 6.1.
InputThe Input tab lists the input devices connected to your computer and the input drivers installed on your computer.
If the DirectX Diagnostic Tool detects a problem with an input device or an input device driver, a warning message is displayed in the Notes box.
NetworkThe Network tab lists the registered DirectPlay Service Providers. These are the connection methods that DirectPlay will operate across. A registry problem here can normally be resolved by reinstalling DirectX.
The Registered Lobyable DirectPlay Applications section lists all applications that have informed DirectX that they will use DirectPlay for their network communication needs. A registry error here can normally be resolved by removing and reinstalling that application.
The DirectPlay test opens a chat window over DirectPlay using the settings you specify. Systems that cannot successfully chat with one another here will almost certainly be unable to establish a network connection within games.
If the DirectX Diagnostic Tool detects a problem with a DirectPlay Service Provider or Application, a warning message is displayed in the Notes box.
More HelpIf you cannot resolve your DirectX issue by using the previous troubleshooting tabs, you can use the More Help tab to continue troubleshooting the issue.
The following list contains a description of the functionality of each button on the More Help tab:
Article ID: 190900 - Last Review: May 7, 2007 - Revision: 5.5