Asus MAXIMUS VIII EXTREME User Manual page 60

7. CPU, water pump, CPU optional, extension, and chassis fan connectors (4-pin
CPU_FAN; 4-pin W_PUMP; 4-pin CPU_OPT; 5-pin EXT_FAN; 4-pin CHA_FAN1-4)
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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The CPU_FAN connector supports the CPU fan of maximum 1A (12 W) fan power.
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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.
Chapter 1: Product Introduction