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Windows XP Lists CNR SoundMAX Audio Extension Card as an Unknown PCI Device

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article was previously published under Q307110
After you install a communication and network riser (CNR) SoundMAX audio extension card, Windows XP does not recognize the card. Device Manager lists the card as an unknown PCI device.
This behavior can occur because Windows XP does not support the CNR-based SoundMAX audio extension card.
To resolve this behavior, contact Analog Devices, Inc. (ADI) to ask about availability of an updated driver that is compatible with Windows XP. Visit the ADI Web site at:Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
The CNR-based SoundMAX (S/PDIF & Optical Output) audio extension card extends audio functionality. Although you can add the card to an i815-based motherboard if the motherboard has a CNR slot, you cannot use the output from the card.

S/PDIF stands for Sony/Philips-Digital Interface.

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: 307110 - Last Review: 12/01/2007 02:41:33 - Revision: 2.7

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional x64 Edition
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