I ended up buying a Inno3D RTX 4090 iChill X3 after i was told by the support of Zotac that the fan-sound of my newly bought Zotac RTX 4090 AMP Extreme Airo is normal.
So here i made a comparison between this two cards before i sadly sent back my zotac :-(. In my last video, it was hard to hear the problem, i hope this one helps to understand the "humming" or "buzzing" sound.
![](https://i.ytimg.com/vi/XY5HLRtLGnw/mqdefault.jpg)