XtremeComputing posted a review on the Noctua NF-S12 and the NF-R8 Silent fans
A quote from the article:
Noctua NF-S12 and the NF-R8 Silent fans Review
Today I shall be taking a look at a product from Noctua that promises to be the answer to those seeking that silent dream. The Noctua NF- S12 and the NF R8. We only got one NF S12 (120mm) as we know most 120mm fans can be run silently, but on the R8 we decided to get 3 of these in to replace a complete set of fans in one rather loud UV acrylic case. Trust me even with the quiet golf ball fan there is still a slight hum of fan noise, so let us see if the Noctuas can give me even more piece and quiet shall we.
Noctua NF-S12 and the NF-R8 Silent fans Review