Multimedia applications like TV in Linux and sound applications, too, have been The final testing took place on an AOpen AX3S motherboard, which includes. AOpen AX4BS-V Intel S Socket ATX Motherboard w/Audio + CPU + MB RAM. AOpen AX3S Pro ATX Motherboard Intel P3 MHz MB. AX3S. Online Manual. What s in this manual .. AX3S. Online Manual. Front Panel Audio (Optional). With AOpen Motherboard plus AOpen Modem Card.