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 1m from the front of the case.
The H60 can get a little loud when the processor is hit with extended 100% load, but it remains quiet during normal use.