HI !! You all must be having problem that windows 7 is not detecting soundmax driver on asus board. On installing from cd that came with motherboard it says OPERATING SYSTEM NOT SUPPORTED!!
So the solution for this problem is.
Download this zipfile from the link
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Extract the contents.
Findsetup.exe in it. Now, right click on the setup and choose option Troubleshoot compatibilty.
It will detect issues and search programs and you will be presented with a set of options.
Choose option it ran with previous versions and also choose need special permissions.
click next . And your setup should start.
Let the driver install . restart when prompted and done enjoy music on you system.
You may for first time get a Notification No ADI codec driver found.. Just click ok everything is fine.
IMPORTANT. do not try to upgrade the driver from device manager or it will again return to No sound condition.