part of the point is that this guy stuffed a Prometia AND a water cooling system into a Lian Li AND at the same time made it look BEAUTIFUL. he completly rearanged the innards of the case as well which is very cool.
Prometeia are extreme cooling devices like a Vapochill which consists of a compressor, evaporator and some other parts which I'm not farmiliar with that cools into sub zero temperatures and it's very consistant up to like 100 watts of heat. The Prometeia's are in fact, better than the Vapochill because of maintaining better temperatures.
There is no noise ad all, al the fan`s are @5V, and also get the right rpm by the prometeia and the fan bus.
So the watercooling you can`t hear, and the Prometeia making only a litle sound when it`s getting start up. Just the same like the freezer at your home.
ps, you can better have 10 fan`s @5v than 2 fan`s on 12v with a high rpm.