To conduct our noise level tests, we replaced the graphics card in our system with a AMD Radeon HD 5550 Silence which was passively cooled. We also momentarily disconnected the fans on the CPU cooler so we were only taking into account the noise generated by the fans in the case.
We are also impressed with the acoustic performance of the case, which is excellent considering the lack of sound proofing. Again, this is thanks to the quiet Air Penetrator fans and the lack of a rear exhaust fan.