Please refer to the user manual and check whether relevant hardware/software settings as well as signal connections are set correctly. Also make sure the multimedia files, such as DVD、CDROM、and MP3 files, and multimedia players you use support 5.1 channel audio output.
The difference between motherboard revision 1.0 and 1.1 is the cooling system design. Revision 1.1 has a modified layout structure reinforcing the overall construction of cooling design to improve quality. When the product is used under same conditions, the thermal performance and system compatibility between revision 1.0 and 1.1 are the same.