Hello, thank you very much for all your replies. Yes, that's what I thought, on most of the 4080s and 4090s that I tested I had the same problem except ... On the one I currently have, which is a superb graphics card, with very good temperatures and very good results, it's the KFA2 RTX4090 SG OC KFA2 RTX4090 SG OC (24 GB)
The only thing that bothers me is that I have a white PC which is full ASUS and I would have liked to take the white STRIX in 4090 and I would have liked to sell my KFA2 which is really top top top top without coil whine ...

Yes, mine has that too, but I only hear it when it's quiet in my room and I have my ear close to the case. So I don't hear anything when I'm gaming. And it only occurs when I use it heavily. So it's not annoying and if you use a headset you never hear it.

Hello

Can't tell you that yet Pc is still being built, can only pick it up tomorrow

This is the case with practically all new GPUs. At high fps or 4k120+fps, practically under full load, you can sometimes hear it. But it's not really annoying if you play with a headset.

Yes, as far as I know, all RTX4090s have it. Mine has it too. But it's only clearly noticeable during a benchmark. I haven't noticed it negatively during gaming so far. My PC is on the table, right next to the monitor.