4U industrial chassis depth of 51 cm only Motherboards ATX / EATX. LED indicator lights on the front and a task hard drives. Operating buttons, boot and USB 2.0 on the front. Residency to 6 devices “5.25. FSP 650W REDANDUNT Supports up to seven full-height expansion cards and 29 cm depth. Including an expansion card locking mechanism. (Option for 2 industrial Maorrim 80mm rear).