Last month I decided to change out my H150I Elite Capellix AIO with Corsair QL 120 RGB fans attached to the cooler. The AIO has served me well for many years. I decided to go with iCUE Link H150i LCD 360mm AIO along with the Corsair iCUE Link QX 120 fans starter pack (3 fans). I was looking forward to the iCue Link single cable installation.
The first thing I noticed was the increased noise of the AIO pump compared to my older H150i Elite Capellix. My PC is placed to the right of my monitor and is approx. 3 feet away from and the AIO pump is at ear level. If I place the AIO pump in quiet mode and place the fans at 50% or greater speed in iCue software I can mask the AIO pump noise. Forget placing the AIO in the balanced or extreme settings as your video shows / sounds the sound level increases and so does the tone gets higher. I rather listen to the louder sound of the fans over the sound and tone of the AIO pump even in quiet mode.
I sent Corsair customer support a video of the sound of the AIO pump and they informed me it was normal. Since I purchase my AIO from Amazon, I purchased another one (same model) and it produced the same sound. Corsair customer support advised me to return the AIO if I could not live the sound of the AIO pump. I was also dealing with a reduced brightness issue message in the iCUE software. Corsair is presently working on that issue as others have reported the issue after a firmware update that is associated with Link Hub.
My solution was to return the iCUE Link AIO and fans I purchased and installed my old setup. Like you when I game the sound from the game masks the sound from the AIO pump but I also use my PC for work related tasks at home and it is very quiet in my office in my house. I own many Corsair PC related items, RAM , PC case, headset, PSU, and keyboard.
The funny thing is, a YouTube reviewer did a review later last year with the same items I purchased. I posted a comment on his Youtube channel describing my AIO pump noise and he replied that his setup does not have any noise that you and I are experiencing.