The power supply is clean and well processed by the plugin system all cables are not needed to be kept out of the PC herraus which creates space and clarity. The large fan rotates when you turn up briefly, then regulate but to first inaudible level, and is at least for me, despite energy-hungry i7 and GTX680 also playing not louder. I recommend to take the charge on the 730W model into account, since the power supply is almost not heard up to 60% load. Anyone who attaches importance to absolute peace, should choose generously dimensioned depending on the hardware, then the power supply reaches the power state of 80% or higher and is hardly including beautiful laufruig. Otherwise a typical Be Quiet product, not cheap but very good!