M/B Form Factor ATX(12" x 9.6"), ATX(12" x 10"), EEB(12" x 13") Drive Bay External: hot-swap 3.5" x 12 or 2.5" x 12 5.25" x 1 Internal: 2.5" HDD x 2 or 3.5" HDD x 1 Power Supply Case Only no PSU Indicator Power status, HDD, LANs, System fail activity LEDs Front Control Panel Power switch, ID switch, System reset, NMI, USB 3.0 x 2 Chassis Security Intrusion Switch (optional), Padlock Loop, Kensington Lock Supported Backplane Mini-SAS HD, SFF-8643 x 3 (12Gb/s supported) Cooling Fan 92 x 25mm PWM easy-swap fan x 3 Expansion Slot Full height PCI slot x 7 Material Material: SGCC Thickness: 1.0mm Cubic Feet 5.36 Item Dimension (L inchxW inchxH inch) 24 x 29 x 14