Asus M5A78L USB3 User Manual page 38

8. CPU and chassis fan connectors (4-pin CPU_FAN and 3-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
M5A78L/USB3
M5A78L/USB3 Fan connectors
DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
Only the 4-pin CPU fan supports the ASUS Q-Fan feature.
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CPU_FAN
CHA_FAN
GND
+12V
Rotation
Chapter 1: Product introduction