I can chime in on the other side.Yea it's weird to see people say they are having issues, I don't doubt them but after hours of Enhanced gaming and watching UHD movies I've never heard the X1X do anything
Again, it is not SUPER loud but I can hear it. Quiet room, I mute the TV while playing a game like Wolfenstein 2. Yes I can hear the fans running. At certain points, I can hear the fans kick into to overdrive for 3 seconds of "whoosh" With the audio on, I can't really hear it. Unless the scene gets quiet or it gets to a loading screen.
My console is absolutely not silent though