New
#11
You must have a different model/version motherboard that what is listed in your original post. Accessing the specs for the motherboard listed on your first post lists Realtek as the sound hardware.
One final option, and I've seen this on several with a device driver problem, is to do a complete new (clean) install. I know its radical but I've seen cases where the OS is corrupted and won't allow correct driver install.
Unfortunately the reinstall may be required. I've worked several similar audio problems, on this forum, that required a reinstall to fix the problems.