3. HARDWARE SETUP 12) Serial Infrared Module Connector (5-pin IR) This connector supports an optional wireless transmitting and receiving infrared module. This module mounts to a small opening on system cases that support this feature. You must also configure the setting through Peripheral Setup (BIOS) to select whether UART2 is directed for use with COM2 or IrDA. Use the five pins as shown in Back View and connect a ribbon cable from the module to the motherboard’s IR connector according to the pin definitions. IR Front View Back View 1 +5V IRRX GND IRTX ® CUA +5V IRTX IRRX (NC) GND 3.
H/W SETUP Connectors CUA Infrared Module Connector 13) ATX Power Supply Connector (20-pin block ATXPWR) This connector connects to an ATX power supply. The plug from the power sup- ply will only insert in one orientation because of the different hole sizes. Find the proper orientation and push down firmly making sure that the pins are aligned. IMPORTANT: Make sure that your ATX power supply (minimum recommended wattage: 200 watts; 235W for a fully-configured system) can supply at least 20 amperes on the +5-volt lead and at least 10mA (720mA recommended) on the +5- volt standby lead (+5VSB).
Your system may become unstable/unreliable and may experience difficulty in powering up if your power supply is inadequate. For Wake- On-LAN support, your ATX power supply must supply at least 720mA +5VSB. +3.3 Volts -12.0 Volts Ground Power Supply On Ground -5.0 Volts +5.0 Volts +5.0 Volts Ground Ground ® CUA +12.0 Volts +5V Standby Power Good Ground +5.0 Volts Ground +5.0 Volts +3.3 Volts +3.3 Volts Ground CUA ATX Power Connector 36 ASUS CUA User’s Manual