Hi. yes, I've used several PSUs.I've got to say, did you try swapping out the PSU? The only time I had it (a GTX 1080) it howled like a banshee but the PSU took a turn for the worse not long after I'm inclined to think the two are related. Never seen it since in regular use. That being said you will get whine if you have ridiculously high FPS in menus say, always limit to something close to maximum monitor refresh rate anything over is wasted effort on the gpu's part.
I started with an EVGA 500w BR Bronze then move on to an NZXT C750W and then recently I upgraded to a Corsair RM850W 2019
Because of the zero fan RPM. But I still get coil whine
After reading this forum I guess I'm just extremely unlucky!