Yeah, I think it’s the onboard audio. Physical gap to prevent picking up all the noise from the pcie slots.

I’d just check for any components in that area while after it’s running to make sure nothing is getting to hot. If you don’t want to buy a new mb and want to be maybe safer disable onboard audio in the bios. Then use your GPU, find a cheap sound card, or use usb audio.

Something is damaged, but sometimes it doesn’t effect how your using it.

deleted by creator