I have two Lian-Li PC-O8 case and each of them produce a whining/ringing noise with a headphone connected to front panel. It's not audible during audio playback luckily, but it still annoys me. I want to make sure it's not my motherboard. I tried disconnecting the front USB headers, add shielding to the HD Audio wire, installing chipset and audio drivers but nothing solved the problem. If I connect the headphone directly to the motherboard, the audio is fine. How can I be sure, that it's not caused by a faulty HD Audio header?
Also I'm having issues with the built-in speakers of my Asus ROG Swift monitor. I sold my GPU last week and I'm using the Intel HD graphics currently. I hear two popping noise before and after each sound that comes from the monitor. I tried using HDMI instead of DP and it's the same. The strange thing is, when I connect the computer only to my TV the popping stops. If I connect a headphone the the monitor, the popping is also present in the headphone. Also I don't I had this issue with the Nvidia GPU installed. Maybe it's the Intel Display Audio driver, but I still can't rule out the motherboard.
Also I'm having issues with the built-in speakers of my Asus ROG Swift monitor. I sold my GPU last week and I'm using the Intel HD graphics currently. I hear two popping noise before and after each sound that comes from the monitor. I tried using HDMI instead of DP and it's the same. The strange thing is, when I connect the computer only to my TV the popping stops. If I connect a headphone the the monitor, the popping is also present in the headphone. Also I don't I had this issue with the Nvidia GPU installed. Maybe it's the Intel Display Audio driver, but I still can't rule out the motherboard.