D-416 is a reliable and stable 4U-high server chassis. The full size I/O supports all ATX motherboard with a Dual-core/ Quad-Core processors and the backplane supports 7 full-height add-on cards. This chassis is 21" deep and has optional three 80mm cooling fans in the center and two 60mm fans at rear for air ventilation. In addition, D-416 supports a standard ATX PS2 power supply to meet regular server system applications. - Supports Front Access USB2.0 x2. - Power and HDD LED. - Power and Reset Switch. - Support ATX PS2 Power Supply.