I've heard from electronics enthusiasts that the coil whine could be caused by the power supply. Can you test with another power supply of the same power or more
I reckon cekeu might be spot on, the power supply is likely contributing to the coil whine.
I upgraded to a Seasonic TX Prime 1000w and I have never had this since, my specs are in profile. I see you have same PSU as me, seems odd as its highly rated. Perhaps change the GPU power cables?