Asus P4RD1-MX - Manual (Page 16)

1-4 Chapter 1: Product introduction
6-channel audio support
The motherboard comes with the ADI AD1986A high-definition audio
CODEC that lets you enjoy high-quality 6-channel audio without having to
buy advanced sound cards.
S/PDIF digital sound ready
The motherboard supports the S/PDIF Out function through the S/PDIF
interfaces on the rear panel and at midboard. The S/PDIF technology turns
your computer into a high-end entertainment system with digital connectivity
to powerful audio and speaker systems. See pages 1-26 for details.
USB 2.0 technology
The motherboard implements the Universal Serial Bus (USB) 2.0
specification, dramatically increasing the connection speed from the
12 Mbps bandwidth on USB 1.1 to a fast 480 Mbps on USB 2.0. USB 2.0 is
backward compatible with USB 1.1. See pages 1-20, 1-21, 1-24 and 2-18
for details.
Temperature, fan, and voltage monitoring
The CPU temperature is monitored by the ASIC (integrated in the ITE
Super I/O) to prevent overheating and damage. The system fan rotations
per minute (RPM) is monitored for timely failure detection. The ASIC
monitors the voltage levels to ensure stable supply of current for critical
components.