The Silencio is a silent case that makes no compromises in thermal performance. Sound dampening material surrounds the system build, rubber padding cushions all included fans, and a removable cover shields noise that escapes from the top panel. For optimal noise reduction, the steel side panel features sound dampening materialMotherboard Supported - 15.50 lb - 5 x Fan(s) Supported - 1 x External 5.25" Bay - 4 x Internal 3.5" Bay - 4 x Internal 2.5" Bay - 4x Slot(s) - 2 x USB(s) - 1 x Audio In - 1 x Audio Out.