5.When the fan and heatsink assembly is in place, connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.

CPU_FAN

GND

CPU FAN PWR

CPU FAN IN

CPU FAN PWM

CROSSHAIR II FORMULA

CROSSHAIR II FORMULA CPU fan

Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if you fail to plug this connector.

This connector is backward compatiable with old 3-pin CPU fan.

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Chapter 2: Hardware information