"The NZXT Whisper Case is unique in a way that is different from most cases. The Whisper by NZXT features 10mm noise dampening foam pads placed around the case. The Whisper comes with HDD mounts that have rubberized grommets to help reduce noise and vibration from the HDDs. The NZXT Whisper has nine hard drive bays and six 5.25" drive bays for those who need a lot of room or plan to expand in the future. NZXT even provides a special rubber gasket for your PSU to eliminate noise from it, as well. The NZXT Whisper HDD brackets are compatible with both 3.5" and 2.5" HDDs and the PSU is separated from the motherboard to help keep the heat away from most of the major components. The Whisper is also equipped with two 120mm fans and two 80mm fans to constantly keep air moving through both chambers of the case."