I ordered the power supply due to a test in the c't 26/2010 and am well pleased. It is actually the quietest power supply that I had previously. For anyone who wants to make its middle-class computer quietly, I can only recommend it. It runs virtually silently in my case (Antec 300). Because no other fan in run (very good heat circulation from bottom to top by a thick heat sink around at lower overall exposure ((no games))) is the entire computer almost silently. Andreas