have bought the fan eigentich because of voltage change to 7V, because I no longer had something at home. He is now the loudest part of a PC with an AMD 6850 in the reference design, a 8400E, and an original Lenovolüfter 92er, and Lenovonetzteil 290W and but at 7V, 12V can no longer speak of quiet one, I wonder even if I will not let an old 12er from BitFenix Shinobi run on 7V, because I think that would be quieter. So BQ I'm a bit disappointed here.