PCGamesN was saying that the
quietest AIO cooler is the Corsair H100i Pro RGB.
That's total bull from PCGN. ANY cooler can be set to run quiet once you customize fan/pump curves yourself.
when the computer is in full use for hours?
... doing what?
Without having to change anything in bios:
1)Games? Sure.
2)Browsing, MS Word, video editing? Sure.
3)Blender, Cinebench R23, OCCT small data set, and the like? Negative.
I'm currently using a 7820X direct die mounted with an Alphacool Eisbaer Aurora 360(fans replaced with Phanteks T30-120). I've also used a NH-D15S(2 fans) and Fractal Celsius+ S28 Dynamic on it.
With 1 & 2, I personally don't notice any difference between these 3 coolers. It's not until apps like Cinebench and OCCT that the coolers start to split off.
FYI: H100i Pro is about the same tier as the NH-D15.