For those of you who aren't that familiar with Noctua, they are an Austrian company that has been in the business of providing elite cooling solutions since 2005. I would say that they are best known for their high-performance / low-noise CPU coolers, but they obviously also sell their unique cooling fans separately.

On hand for this roundup we have three 120mm fans and three 140mm fans. The specific models include the NF-S12A FLX, NF-S12A ULN, NF-S12A PWM, NF-A14 FLX, NF-A14 ULN, and NF-A15 PWM.