This fan is OK, does exactly what it should, nähmlich my Dreambox 800 HD cool. As for the volume of the fan, I can not recommend anyone to spray the shaft at the fulcrum with graphite powder, then is the super quiet, and when I say that is quiet, he is silent, then 0 dB and no noises are there more , The FYI: runs 24 hours a day, and from March.