I built my PC a year and a half ago and recently, coil whine started happening. And I am 100% sure the noise comes from the motherboard since the sound intensifies when I listen from the top of the case/near the cpu compared to near the psu or gpu.
I don't think that the motherboard alone could produce this type of sound. The problem may be coming from the psu as it probably delivers bad power to the motherboard, but I'm not 100% sure
mobo : msi b450 gaming plus max
psu : be quiet system power 9 700w
gpu : xfx 308 rx 6600xt
cpu : ryzen 5 3600
I don't think that the motherboard alone could produce this type of sound. The problem may be coming from the psu as it probably delivers bad power to the motherboard, but I'm not 100% sure
mobo : msi b450 gaming plus max
psu : be quiet system power 9 700w
gpu : xfx 308 rx 6600xt
cpu : ryzen 5 3600