Noise emanating from the CPU section.
Noise emanating from the CPU section.
Your approach to measuring noise might be off. Sound waves can be tricky, and motherboards aren’t designed for easy measurement—especially with a CPU cooler in place.
Whine results from shaking, CPU components may not vibrate audibly despite tight packaging. Their minuscule size also means vibrations occur at frequencies beyond human hearing range.
It might be your mainboard. Switching the power adapter could potentially assist, as it supplies the voltage to the mainboard, though it's uncertain.
motherboards are far more prone to coil whine compared to graphics cards, though results can vary for both.
It seems the issue might be related to the iGPU. You didn't note the minor whining during the prime95 test.