When the game or application reports AGP is "off" or disabled, or Microsoft DirectX* Diagnostic tool (dxdiag.exe) shows AGP Texture Acceleration is "not available" on the display tab, check for an update.
If the graphics driver reports all of the video memory is local, the DirectX AGP Texture Acceleration setting shows "Not Available." If some or all of the video memory reported is non-local, the AGP Texture Acceleration setting shows "Available."
Older Intel® Graphics Drivers (production versions 13.0 or greater) report all of the video memory as non-local video memory (AGP memory). Therefore, the AGP Texture Acceleration setting shows "Available."
The latest Intel Graphics Drivers (production versions 14.X or greater) don't report non-local video memory. Instead, all of the video memory is reported as local video memory. Normally, the AGP Texture Acceleration setting shows "Not Available" on computers using the latest Intel Graphics Drivers because the driver isn't reporting non-local video memory.
|Note||With the Intel Graphics Drivers (production versions 15.0 or greater) on the Windows Vista* and newer Windows* operating systems, AGP Texture Acceleration shows as "Available." While the Intel Graphics Driver still reports only local memory, these Windows operating systems control the memory management and interprets the Intel graphics aperture as non-local memory. To further clarify, the graphics aperture is a contiguous virtual memory space where the Intel Graphics Driver initiates access to the graphics memory.|
Having the AGP Texture Acceleration setting as "Not Available" is a normal and expected behavior for the Intel graphics drivers (production versions 14.0 or greater). This setting doesn't need to be made available, enabled, or activated, and doesn't affect the performance of games or 3-D applications.
When a game or application is checking for AGP or AGP Texture Acceleration, it is looking for non-local memory. Generally, local video memory is usually faster than non-local.
Intel recommends contacting the game or application vendor to get a setting or update that allows the game or application to check for local video memory first.