Many of you are complaining about gigabyte but either using older drivers such as 18.104.22.16832 (which are a year out of date) Realtek are up to 8600 with the uad drivers (no gigabyte) customisation yet.
Or you are using an older version of windows 10.
Seriously update to 1809 win 10 if you have w10 and use the 8475 uad drivers from the driver page
if you loose front or rear sound - just swap to the blue line out jack and retask the conection. The drop in the front/rear jacks is down to drivers.