Mixed opinion
Noctua NF-A14: a good reference, but only on paper... Ordered to replace an ageing ANTEC tower fan that was starting to vibrate.
But as soon as I switched it on, I already missed the original fan because of the noise generated by this Noctua.
Perhaps an attenuator to reduce the rotation speed a little would have solved the problem, but this product doesn't have one.
Looking for something really quiet? Skip it ...