Virtual address space usage + DirectX 10 not using the second graphics card - Overclock.net

Fierceleaf · 09-01-07

Im not sure if this is old news or if these are included in windows updates in Vista but its worth a look anyway. There is a download attached on each page.

Virtual address space usage in Windows game development

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SUMMARY
This article discusses virtual address space usage in Windows game development. The article describes potential problems that may occur when you run applications in a modern operating system such as Windows Vista. The article contains information about an update that may resolve some of these problems. For more information about these problems, visit the following Microsoft Web site:

When a DirectX 10 application runs on a Windows Vista-based computer that has multiple graphics cards, the computer does not use the secondary graphics card

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SYMPTOMS
Consider the following scenario:
• You have a Windows Vista-based computer.
• The computer uses two or more DirectX-compatible graphics processing units (GPUs) in a linked configuration.
• You are using a DirectX 10 application and driver.
In this scenario, the computer's graphics performance indicates that only a single GPU is being used.