6 x USB 3.1 Gen 1 (4 front, 2 rear) , 2 x microphone (1 front, 1 rear) , 1 x headphones (1 in front) , 2 x USB 2.0 , 1 x serial , 1 x LAN (Gigabit Ethernet) , 1 x VGA , 2 x DisplayPort , 1 x PS/2 keyboard , 1 x PS/2 mouse , 1 x audio line-in , 1 x audio line-out , 1 x parallel