Asus A7Pro Motherboard DIY Troubleshooting Guide - Page 39
pin PWR_FAN, CHA_FAN, F_FAN, CPU_FAN
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3. HARDWARE SETUP 14) Power Supply, CPU, Chassis Fan Connectors (3-pin PWR_FAN, CHA_FAN, F_FAN, CPU_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 consideration 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). The Rotation signal is not supported by F-FAN. 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. PWR_FAN CHA_FAN GND +12V Rotation F_FAN CPU_FAN A7PRO A7PRO 12-Volt Cooling Fan Power 3. H/W SETUP Connectors 01 01 01 GND +12V Rotation NC +12V GND Rotation +12V GND ASUS A7PRO User's Manual 39