Hello, my problem is that I hear a buzzing electrical sound in my rig from quite a distance. I don't know whether it's my CPU, GPU or power supply unit. What I discovered is that when I run prime95 to stress my CPU, the buzzing sound seems to get louder. Also, when my rig is powered down, I can still hear the buzzing noise. The only way to eliminate this annoyance is to unplug the power supply from the wall.