Fits micro and standard ATX motherboards. 500 Watt EarthWatts power supply included. Integrated cable organizers. 4 x 5.25" external drive bays (w/ 5.25" to 3.5" adapter) 4 removable HDD bays Front-mounted ports for easy multimedia connections: 2 x USB 2.0 1 x IEEE 1394 (FireWire i.Link) Audio In and Out (High Definition and AC 97 compatible). 120mm TriCool selectable-speed fan (installed). Built-in washable air filter. Removable front and side bezels.