Please note that coil whining is in no way harmful to your graphics card, nor does it affect the performance or lifespan of the card.
What is coil whine?
Coil whine is the vibration of the coil in an inductor when current flows through it. With high-end graphics cards like the RTX 30 series models, ten or more large inductors supply power to critical components. In short, it is not a hardware problem and it is expected for the card to have this symptom.
Every inductor in every electronic device has coil whine, but for the vast majority of inductors, it's well outside of our hearing range. With high-end graphics cards, however, the inductors vibrate at a frequency in the range that we can hear.
What can I do?
Sometimes, the motherboard and power supply combination might affect how loud the coil whine effect is going to be. That is why testing the Graphics Card in a different computer, with different components is recommended, so you could determine if the coil whine effect can be reduced.
Ultimately, depending on how loud the coil whine effect is you could always check with the manufacturer of your Graphics Card if a replacement is possible.