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Chapter 2: Hardware information
11) CPU Fan, Power Fan, and Chassis Fan Connectors
(CPU_, PWR_, CHA_FAN)
Three fan connectors support cooling fans of 350mA (4.2 Watts) or less.
Orient the fans so that airflow flows across the onboard heat sinks instead of
expansion slots. The fan wiring and plug vary depending on the type
employed. Connect the fan cable to the connector, ensuring that the black
wire matches the ground pin. (Use the “Rotation” signal only with a specially
designed fan with a rotation signal. You can monitor the Rotations Per Minute
(RPM) using ASUS PC Probe (see 5. Software Support).
A7S333
®
A7S333 12-Volt Fan Connectors
PWR_FAN
CPU_FAN
GND
Rotation
+12V
GND
Rotation
+12V
CHA_FAN
GND
Rotation
+12V
WARNING! Make sure to connect the fan cables to the fan connectors.
Lack of sufficient airflow within the system could cause damage to the
motherboard. These are not jumpers, do not place jumper caps over
these connectors!