No water coolers in this build. It sounds like it’s coming from the cpu if I really stick my ear in there, lol. I reapplied thermal paste when I put in a new cpu so idk could bubbles form and do that?? CPU temp is normal.
It’s not loud so I think the buzz you’re hearing is just normal load. The buzz I heard is almost like a sound byte used in video games for electricity. A bit higher pitched as to be more prominent. It’s gone now, though.