Review on Enhance PC Cooling with Scythe Kaze Flex 120mm Case Fan - 2000 RPM, Single Pack by Norman Costello

You can't turn off the sound of airflow, but that's exactly what this fan tries to do. Running at a maximum of 2000 RPM, this silent warrior has enough static pressure to force air through every part of the PC case/dust filter. These fans helped keep the system temperature down on my PC and at least kept it a little quieter. You can't get better performance or a quieter fan for this price. Very close to the performance and smoothness of Noctua fans at half the price.