My tower unit media server has five fans and wasn't the quietest thing on the planet until I fitted air filters having become fed up with the speed at which dust collected inside.
An unexpected side effect is that noise has now dropped to a background hum.
CPU and HDD temperatures remain unaffected, as does the air temperature inside the enclosure with the remote probe I use.
Worth a punt for very few £s.
Last edited by The late XV105; 14th January 2011 at 20:26.
Reason: Typo