Front mesh grill for maximum ventilation. 120mm silent fans at front and back for advanced cooling (front 120mm fan is optional). Air guide and openings on side panel for better CPU & VGA cooling. Dual USB 2.0, High Definition Audio. Drive Bays 9 - Accessible 3 x 5.25 , 2 x 3.5 - Hidden 4 x 3.5 . Expansion Slots 4. Motherboards Micro ATX. I/O Ports USB 2.0 x 2, HD Audio.