2.Push down two fasteners at a time in a diagonal sequence to secure the heatsink and fan assembly in place.
B
A
A
A | B | B |
BA
3.When the fan and heatsink assembly is in place, connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN1.
CPU_FAN1
CPU FAN PWM 
CPU FAN IN 
CPU FAN PWR 
GND 
Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if you fail to plug this connector.
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