Another coil whine user here...yaay...
This may sound dumb but i honestly think Sony did something with the software updates, either that or i got extremely unlucky.
I remember when i got my PS5 i was ecstatic on how quiet it was. I played Astro's for like 3 hours straight and it LITERALLY was "whisper quiet". I went onto Dead by Daylight and was in shock on how it made absolutely no sound, no coil whine, and you could only hear the fan when you were right next to the console. I was also bragging to my cousin on how you could barely hear it, compared to the jet engine that the PS4 was.
I thought how i got lucky to have the quietest fan and how i had no coil whine, but i swear after installing an software update it all went downhill. First the fan noise drastically increased, to the point of me getting my old PS4 Slim flashbacks. I open it up and it turns out i got the worst and loudest fan, even though it was insanely quiet the first week.
Now i open Dead by Daylight, and not only is the fan loud, but its coil whining like crazy, where i can hear it from the other side of the room.
I don't know what to do, i don't usually mind the noise or really notice it unless i'm playing with headphones or it's late at night and it's quiet in the house. It is super annoying once i do notice it, and then i can't help but focus on it, which annoys me even more in the process.
Don't wanna try my luck with getting another unit, as knowing my luck it's going to be even worse that this one, plus the main "warranty guarantee" or whatever is called is probably going to check my console and say that it's completely fine and then return it, as my country is pretty stupid in that sense.