Been having a nightmare the last few days with audio issues (crackling and popping when sound was played). First I thought it was a game issue. Then I noticed it watching youtube. Started testing all my speaker cables, tried headphones. Opened up the PC to check connections since I've replaced the psu and gpu recently. Thought maybe the motherboard might be on its way out. Maybe a dodgy psu?
Then I remembered I overclocked the ram to 3200 when I was last in the bios. The MB is rated to 3466, the ram is 3200, so it shouldn't be an issue. Put it back to 2133 and the audio seems fine now. That is the highest the MB supports without overclocking.
Quick google and my asus MB seems to be the issue. Putting the voltage too high when overclocking? So I guess I'll just leave it at 2133