Installing the AMD southbridge drivers do not install propertly in WHS2011. Normally you can install Windows 7 drivers in WHS2011 but the southbridge/USB 3.0 installation software does not seem to detect the hardware properly in WHS2011. I was able to get the drivers completely installed and working by following the steps outlined here: http://forum.wegotserved.com/index.php?/topic/27006-amd-usb-30-drivers/ in post #8.
It seems to be that all the drivers work correctly in WHS2011 but the installer is not smart enough to install them in this OS. I have read that others have the same issue under WHS 2011 and AMD southbridge/USB 3.0 drivers. Is there a way for me to complete a bug report to get AMD's attention? Thank you.