In our noise level tests we switched off all the case fans and replaced the AMD Radeon HD 7950 graphics card with a HD 5550 passive model so were just taking into account the noise generated by the cooler fans themselves.
We measured the noise level with a Digital Noise Level meter at a distance of 1 m from the front of the system.
All of the scores for the cooler are fairly impressive, however the numbers don’t tell the whole story. When running the pump at 5V and 7V it was completely inaudible. However, increasing the voltage to 12V caused the pump to start whining loudly. We would certainly recommend running the pump at 7V as the temperatures are only slightly worse. The included fans are fairly quiet but those looking for a near silent system should consider upgrading with some high quality Noctua, BeQuiet! or Corsair fans.