The Basic Series fans are the same Real Silent fans as we looked at last year. But the real difference comes with the included Silicon Fan mounts and the color scheme being used on the 80 and 92mm as well. The fans are quiet but slightly underpowered in CFM. But the difference is in both noise / cfm is very slim. But their cheaper than the Noctua's and seriously though, how quiet do you want them? These are pretty quiet already :).
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