[SOLVED] ASRock Z390 Phantom Gaming-ITX/ac Coil Whine

[iDrakus]

Good day!
I ran into a significant problem. My computer is standing next to me on the table. I specifically assembled it for this, making it compact.

When the radiator fans run at low speeds, I clearly hear electric sound (Coil Whine) from the processor area. It definitely comes from my ASRock Z390 Phantom Gaming-ITX / ac motherboard. The sound appears when I move the mouse cursor, and in any operating system, whether it be Windows or Linux. It also appears, for example, when starting a video on YouTube and in other situations.

I do not use a discrete graphics card. My power supply is not making any sounds. What options can I change in Bios to solve this problem?

My configuration:
Motherboard: ASRock Z390 Phantom Gaming-ITX / ac
Processor: Intel Core i9-9900K
Power: Corsair SF750 Platinum
RAM: Kingston HyperX Fury 32GB 3467MHz

 

[alexoiu]

Hi, Not sure about the issue, but try this: connect the CPU cooler to a case fan header and the case fan to the CPU fan header. See if same.

 

[iDrakus]

Hi, Not sure about the issue, but try this: connect the CPU cooler to a case fan header and the case fan to the CPU fan header. See if same.

No, that doesn't help.
I tried to completely disconnect the fan from the processor heatsink - it did not help.

 

[alexoiu]

It could be a ground connection issue. Have you used washers to install the motherboard in the case? Is the wall socket grounded?

 

[iDrakus]

It could be a ground connection issue. Have you used washers to install the motherboard in the case? Is the wall socket grounded?

What washers were you talking about? I screwed the motherboard to the case with the screws from the ASRock kit. My case: NCase M1.

 

[alexoiu]

This kind of washers… https://www.ebay.com/itm/2mmx6mmx1m...rs-Insulation-Spacer-Red-100pcs-/311514645221

 

[iDrakus]

This kind of washers… https://www.ebay.com/itm/2mmx6mmx1m...rs-Insulation-Spacer-Red-100pcs-/311514645221

Do you think this problem may be due to their absence?

 

[alexoiu]

As I said, I'm not sure about the issue, but it might be related to ground. Try using washers. Try also connecting the pc case to the radiator via a metal wire, or touching an exposed metal portion of the pc case, while moving the mouse. See if same.