3. HARDWARE SETUP 14) Power Supply, CPU, Chassis Fan Connectors (3-pin PWR_FAN, CPU_FAN1, CHA_FAN) These connectors support cooling fans of 350mA (4.2 Watts) or less. Orientate the fans so that the heat sink fins allow airflow to go across the onboard heat sink(s) instead of the expansion slots. Depending on the fan manufacturer, the wiring and plug may be different. The red wire should be positive, while the black should be ground. Connect the fan’s plug to the board taking into consid- eration the polarity of the connector. NOTE: The “Rotation” signal is to be used only by a specially designed fan with rotation signal.
The Rotations per Minute (RPM) can be monitored using ASUS PC Probe (see 6. SOFTWARE REFERENCE ). WARNING! The CPU and/or motherboard will overheat if there is no airflow across the CPU and onboard heatsinks. Damage may occur to the motherboard and/or the CPU fan if these pins are incorrectly used. These are not jumpers, do not place jumper caps over these pins. Connectors 3. H/W SETUP CPU_FAN GND Rotation +12V PWR_FAN Rotation +12V GND CHA_FAN Rotation +12V GND CUV4X CUV4X 12-Volt Cooling Fan Power 15) USB Headers (10-1 pin USB2) (optional) If the USB port connectors on the back panel are inadequate, two USB headers are available for two additional USB port connectors.
Connect the USB headers to an optional 2-port USB connector set and mount the bracket to an open slot on your chassis. USBPORT USB Power USBP2– USBP2+ GND NC 1 5 6 10 USB Power USBP3– USBP3+ GND CUV4X Front Panel USB Header 36 ASUS CUV4X User’s Manual