Asus MAXIMUS VI FORMULA User Manual page 60

7. CPU, chassis, and optional fan connectors
(4-pin CPU_FAN; 4-pin CPU_OPT; 4-pin CHA_FAN1-3; OPT_FAN1-3)
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.
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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!
Ensure to fully insert the 4-pin CPU fan cable to the CPU fan connector.
The CPU_FAN connector supports the CPU fan of maximum 1A (12 W) fan power.
The CPU_FAN connector and CHA_FAN connectors support the ASUS FAN Xpert 2
feature.
Chapter 1: Product introduction