If you have not gotten your driver situation straight, this will work:
Go into Device Manager, under the system folder, right click the ms uaa
high definition bus driver. disable the device and uninstall it. you
will be able to load the realtek driver. reboot and enjoy your hd
audio! it is that simple.


--
Chicky

Thank you, it's works.
After changing MB i've got the same problem.
Thaks again!