TGC-23400-2, Drive Bay Supports up to two 3.5" drives and two 5.25" drive, Cooling Fan 3 x 50mm front ball bearing fans, Switch Power ON/OFF x 1, System reset x 1, Indicator Power ON/OFF x 1, HDD x 1, NETWORK X 2, Connector One front accessible USB port, Motherboard Compatibility Support Micro-ATX (9.6" X 9.6"), ITX (6.7" X 6.7"), Power Supply Options Standard ATX power supply. Tgc Rack Mountable Server Chassis 2u 400mm Depth 2x Ext 5.2" Bays 2x Int 3.5" Bays 4x Low Profile Pcie Slots Matx Mb Atx Psu (TGC-23400-2)