Our industrial 4U ATX chassis will support a 14-slot backplane. There are three 5.25" drive bays, one 3.5" bay, and three internal 3.5" bays, all mounted on a floating shock-mounted frame, with a locking drive cover. A 12cm cooling fan is built-in with a removable filter. An adjustable expansion card clamp is built into this sturdy case to keep adapter cards in place under shock and vibration. Choose any PS\/2-style power supply.