tweakoli

Hi, I have a curious buzzing/clicking sound, almost like a HDD searching for data. This seems to only occur on the balanced fan profile in iCue 3.29.110. Balanced seems to sit between 1440-1650 RPM If I try quiet or Extreme the sound disappears. I've created a custom profile and if the fans go into the same RPM range as the balanced profile the sound appears. Does anyone know what could be causing this?