Microsoft KB Archive/810772

= Dxdiag.exe Does Not Report AGP Texture Acceleration =

Article ID: 810772

Article Last Modified on 1/10/2006

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APPLIES TO


 * Microsoft DirectX 9.0
 * Microsoft DirectX 8.1b

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SYMPTOMS
When you run the Microsoft Dxdiag.exe utility on a computer that uses an NVIDIA GeForce 4-based video adapter, the Display tab may report that AGP Texture Acceleration is not available, and the button to enable AGP Texture Acceleration may be unavailable.



CAUSE
This issue may occur if either of the following conditions exist:
 * AGP is not enabled in your computer BIOS.
 * Your video adapter driver does not respond to the Dxdiag.exe query for AGP information.



RESOLUTION
To resolve this issue, use one of the following methods.

Enable AGP in Your Computer BIOS
For information about how to enable AGP in your computer BIOS, view the documentation that is included with your computer.

Obtain and Install the Latest Video Adapter Driver
For information about how to obtain and install the latest video adapter driver, view the documentation that is included with your computer or your video adapter.



MORE INFORMATION
Even if Dxdiag.exe cannot detect AGP texture acceleration, AGP texture acceleration may still be available. Some video adapter drivers implement AGP texture acceleration and manage their own AGP heap memory, and do not report it to the Microsoft DirectX runtime. Dxdiag.exe uses the GetAvailDriverMemory function to query the display driver. However, some video adapter drivers do not respond to this query. For video adapter drivers that manage AGP Texture Acceleration independent of DirectX, games are not affected by the Dxdiag.exe failure to report the AGP Texture Acceleration status.

Keywords: kbhardware kbui kbprb KB810772

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