Want excellent cooling and especially in silence, a management rotation speed run by the board of the German quality, a contact (I had ever dealt with for various technical information before purchase) and with sav be quiet at the top, a system of ingenious anti-vibration mounting ... so it's a quiet fan be you. I replaced all of my home fans Cooler Master case by Be Quiet (I put 4 in total, 2 in 140mm and 120mm 2), this is the day and night. Luckily my computer case is windowed, otherwise sometimes you wonder if it turns.
