Summary: The price was right. For Noctua's that is. I bought 4 for 73.96 from Cool tech PC. I replaced 4 fans that came with my Cool@#master Cosmos case that were a couple years old. There was no difference in sound at all. Airflow dropped a little too as I cut down the rpm's. I expected a slight drop in noise just because the other fans were old and cheap. I'm also addicted to reviews and read enough about Noctua that I always wanted some.
Summary: Pros: Good quality, moves decent amounts of air. The sound it makes is not a high pitched whine. Cons: Not as quiet as some of my other fans. Ugly color scheme. For the money, I was expecting it to be quieter. I will stick with Scythe brand fans next time.
Summary: I bought one of these to replace the loud stock fan in a DroboFS NAS unit. I should have paid more attention to the details - while this fan is indeed silent, it's also a very poor performer when static pressure is called for. Since in a DroboFS the fan acts as an air "puller" and the intake is all but blocked by the drives themselves, this means it needs fairly high static pressure performance to keep air moving through the case.
Summary: J'ai remplacé un Antec Tricool 120 DBB, de plus de 4 ans, par ce Noctua S12B FLX. Le Noctua S12B FLX vaut plus de 20 € contre 11 € pour l'Antec. L'Antec était bruyant au dessus de 1200 tr/mn. En fait, en activant la régulation de vitesse de la carte mère Asus, il tournait soit à 1050 tr/mn avec l'interrupteur Antec sur médium (la plupart du temps), soit à 1450 tr/mn sur la position high (l'été).