My mistake, i checked a website that had the specs for you motherboard. The website said two INPUTS. My apologies...
Evil Newegg. Rear Panel Ports
PS/2 1
USB 8 x USB 2.0
IEEE 1394 1 x IEEE 1394a
eSATA 1 x eSATA 3Gb/s
S/PDIF
In 1 x Optical, 1 x Coaxial
Audio Ports 6 Ports
The Asus website says they are outputs...