EarthWatts 500 Watt power supply (80 PLUS certified) Front mounted USB, eSATA, HDA & AC 97 Audio In/Out ports 9 Drive Bays: - 3 x 5.25" external drive bays - 2 x 3.5" external drive bays - 4 x 3.5" internal drive bays in individual trays with silicone grommets to absorb hard drive vibrations Cooling System: - 1 rear 120mm Tricool fan (standard) with 3-speed control to balance quiet with cooling - 1 front 120mm case fan (optional) Motherboards up to Standard ATX