A DirectX 9.0 application crashes on a computer that has more than 16 logical processors configured

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

To work around this issue, you can use one of the following methods to create or to modify a registry key that will change the processor-specific graphics pipeline settings.

Setting the number of logical processors that use processor specific graphics pipeline(PSGP)

To have us set the number of logical processors that use processor specific graphics pipeline(PSGP) for you, go to the "Fix it for me" section. If you'd rather number of logical processors that use processor specific graphics pipeline(PSGP)yourself, go to the "Let me fix it myself" section.

Fix it for me

To set the number of logical processors that use processor specific graphics pipeline(PSGP)to 16 automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.

Note This automatic fix sets the number of logical processors that use processor specific graphics pipeline(PSGP) to 16.

Note This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or a CD so that you can run it on the computer that has the problem.

Let me fix it myself

1. Click Start , type regedit in the Search programs and files box, and then press ENTER.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\Software\Microsoft\Direct3D
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type PSGPNumThreads, and then press ENTER.
5. Right-click PSGPNumThreads, and then click Modify.
6. In the Value data box, type the number of threads that you want to use, and then click OK.
7. Restart the computer to apply the change.

Note

• If you are running a 32-bit application on an x64-based computer, you must add the following registry subkey in addition to the registry entry that is described earlier in this section:
  HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Direct3D
  Then, set PSGPNumThreads to the number of threads that you want to use.
• The number of threads should not exceed the number of the logical processor that supports up to a maximum number of 16 threads.

Disable the processor specific graphics pipeline

To disable the processor specific graphics pipeline yourself, follow these steps:

1. Click Start , type regedit in the Search programs and files box, and then press ENTER.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\Software\Microsoft\Direct3D
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type DisablePSGP, and then press ENTER.
5. Right-click DisablePSGP, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Restart the computer to apply the change.