Noise Level Results
At an idle the fans run from 900 to around 1100 RPM as it adjusts to the minor increases in temperature while things get shuffled around in the background processes. Even so I got an average reading of 30dB of noise behind the radiator at 12 inches away.
Outside of that first foot or outside of a case, you aren't likely to hear it at all at this stage of the game.
With the overclock applied and twelve volts running to the fan, the level of noise does jump up a bit, but it's nothing to be worried about. With a reading of 54 dB at this point I would hope you were playing a game to induce this level of stress and then the games audio will cover the noise of the H60.