be quiet! CM BQT E9-CM Straight Power PC Power Supply (580 Watt) (Accessories)
Hey What can one say much ?! The NT is very quiet and, with its 80+ Gold - certification about 548 watts, which is quite good! In my case I have about 5 fan (large and small) and the NT is by far the quietest "fan", I've ever had in my PC! Easy