Microsoft KB Archive/270715

= AGP program may hang when using page size extension on Athlon processor =

Article ID: 270715

Article Last Modified on 1/27/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Media Center Edition 2002
 * Microsoft Windows XP Tablet PC Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Datacenter Server

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This article was previously published under Q270715



Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
A Windows-based computer may stop responding (hang) when you use an Accelerated Graphics Port (AGP) program such as Ziff Davis 3D WinBench 2000. This behavior may occur more frequently depending on the computer's processor, memory, and graphics configuration. This problem is known to occur with NVIDIA GeForce 256 and Matrox G400 video adapters on computers with AMD Athlon processors. This issue is not specific to any particular video adapter type.



CAUSE
This behavior can occur if memory that is allocated by the video adapter driver is being corrupted.



RESOLUTION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

The following workaround for this issue prevents Memory Manager from using the processor's Page Size Extension feature and may affect the performance of some programs, depending on the paging behavior. This registry value also limits non-paged pool to a maximum of 128 megabytes (MB) instead of 256 MB.  Start Registry Editor (Regedt32.exe). Locate and click the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management

 On the Edit menu, click Add Value, and then add the following registry value:

Value name: LargePageMinimum

Data type: REG_DWORD

Radix: Hexadecimal

Data value: 0xffffffff

 Quit Registry Editor. Restart the computer.</ol>

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MORE INFORMATION
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Additional query words: kbfaqw2kperf

Keywords: kbgraphic kbhardware kbprb KB270715

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