Audio Interference with the B860L WIFI

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   Severe Audio Interference with the B860L WIFI Motherboard

My B860L motherboard, paired with a Core Ultra 5-235 processor, is producing severe interference noise at the audio output. The noise intensifies when the processor is under load?�for instance, when a program is launched or the mouse is moved.
I have tried several different ATX power supplies, but the noise persists.
I also tested two separate sound cards as an alternative to the motherboard's integrated audio output; it appears the interference is being transmitted via USB.
This situation is particularly frustrating, as I use this PC for music production.
Is the motherboard defective? Or is this a design flaw?

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Juergen Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 17 Dec 2025 Status: Offline Points: 45	Post Options Post Reply Quote Juergen Report Post Thanks(0) Quote Reply Topic: Audio Interference with the B860L WIFI Posted: Yesterday at 3:22am
	Severe Audio Interference with the B860L WIFI Motherboard My B860L motherboard, paired with a Core Ultra 5-235 processor, is producing severe interference noise at the audio output. The noise intensifies when the processor is under load?�for instance, when a program is launched or the mouse is moved. I have tried several different ATX power supplies, but the noise persists. I also tested two separate sound cards as an alternative to the motherboard's integrated audio output; it appears the interference is being transmitted via USB. This situation is particularly frustrating, as I use this PC for music production. Is the motherboard defective? Or is this a design flaw?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 38978	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: Yesterday at 5:11am
	It may be worth trying the system outside the case. Bad grounding can cause audio interference too, if you don't have any of the board's grounded mounting holes making contact with the case it could be causing issues. I have seen this with some cases that use anodized/painted standoffs. The same applies to the power supply itself, if it isn't grounded to the case it may cause interference. Now that I am thinking about it, maybe also check to make sure your actual power outlet is properly grounded and that your power cable is grounding correctly too. I have built more than a few audio workstations over the years, in almost every instance I had interference issues it turned out to be either a bad ground or a noisy (electrically) PSU. It shouldn't be caused by the board itself as it has an isolated portion of the PCB dedicated to audio explicitly to prevent noise/sound contamination. If it is happening with the built in audio then it's highly unlikely to be the USB ports as the sound portion of the board is physically isolated and shielded from the rest of the board.