Noctua NH-U9 and NH-U12 - quiet and effective cooling

Looking at the stores of computer shops, many are at a loss thinking why such huge cooling systems are needed is small boxed cooler does its job well enough! It doesn't make much noise, and what's so big about it? There is one thing to know. Some people start up the PC like a "magic box" and are absolutely not surprised by that the computer makes sounds similar to a Boeing getting ready for a take-off - if it's roaring, it works! Others power on the PC as if it is a vacuum cleaner or a washing machine - as a household appliance. You haven't noticed the new trends in the adverts of washing machines: "Noise-free operation, nothing will disturb your calm..." , or something like that, have you? The same applies to vacuum-cleaners and other household appliances. Since these became ordinary household items, people have been increasingly exigent to the qualities of these devices. Including the noise levels. So the struggle for quietness of the CPU unit has been in full sway for the past several years.