If it's doing it on front rear and hdmi, it's not the sound chip on the board, hdmi carries audio from a chip on your graphics card, an entirely different sound chip.
It could be ram, it might be worth giving memtest an overnight run.
I'm also having issues with the rear audio on my Gaming 7 WiFi. Just built a new rig with the following:
- Aorus X470 Gaming 7 WiFi Rev 1.1
- Ryzen 3600X
- RTX 2070 Super
- 16GB Trident Z 3200mhz C14 RAM
Updated Bios to F42a, installed Windows 10 Home 1803 and updated to 1903, installed AMD chipset drivers, updated firmware, installed audio drivers from Gigabyte's support page. Audio worked fine for a few days, then I turned on the PC one morning and no sound from the rear green Line Out port. Plugged the speakers into the front headphone jack on my case and everything works fine, tried the headphone jack on my monitor and everything works fine. Plugged the speakers back in to the green Line Out port and nothing. Plugged the speakers in to all the other rear ports one at time, selecting stereo speaker output for each, and no sound from any of the rear ports.
Reinstalled the audio drivers from Gigabyte's page, nothing. Installed the most recent drivers from Realtek's page, nothing. Flashed the audio chip with the firmware provided by @GIGA-Man and nothing.
Based on Google and forum searches, audio issues seem to be somewhat common with these boards, but nobody seems to have the exact symptoms as me either.
I really don't want to tear my rig apart and wait for weeks to have the board replaced/repaired, but I need to have this issue resolved, any help will be greatly appreciated!!
To be honest, I can't say for certain that the firmware flash is working correctly, as it gives me no feedback. I unzipped the the file and ran it, loaded the .bin file and clicked flash, then it restarted my computer and that's it. No confirmation was given as to whether or not it had worked, but it didn't fix the issue I'm having with the sound. I also downloaded and installed the EC FW Update tool from the Gigabyte support page which contained an application called IFU_XE32_v1310, and I can't get that one to work at all. I open the application and an error message appears immediately saying the .bin file cannot be found, and when I click OK the application terminates. There are several .bin files in the same folder as the application, but it doesn't give me a chance to select or load any as the error message appears as soon as the application is launched.If you've used the flash and you are getting the same issues that's strange, everyone that used the update I passed them had the issue fixed. Can you make sure the firmware is 100% installed, some times if you try installing direct from a .zip file or .rar it will not work. Make sure the file is unzipped to your desktop, then run the update. If it still does the same I can ask my RMA team to have a look but as it's random this could be sent back as no fault found.
Let me know how you get on and I will see what I can do for you.