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

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This article was previously published under Q270715
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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.
This behavior can occur if memory that is allocated by the video adapter driver is being corrupted.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows

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.
  1. Start Registry Editor (Regedt32.exe).
  2. Locate and click the following key in the registry:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
  3. 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
  4. Quit Registry Editor.
  5. Restart the computer.
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.

Article ID: 270715 - Last Review: 02/28/2014 04:20:17 - Revision: 4.4

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