COIL WHINE is not harmful. It is just annoying/irritating if your GPU is giving high-pitched squeaking sounds. Nothing to worry.
Sadly, there isn’t an easy fix for coil whine, like an updated driver or a Windows setting. It’s a physical property of your graphics card (or any other component you can hear exhibiting the noise). The fixes for the problem, therefore, are going to be physical in nature, IF ANY.
As power runs through the coil it vibrates and causes the noise we all find irritating. This is sometimes the case of bad soldering of an inductor coil, but it is not always the issue. Most usual suspects are core and input filter coils due to the fact that most of the current flows through them. Coils in the memory...