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Chapter 2: Hardware information
Chapter 2
8. CPU and chassis fan connectors
(4-pin CPU_FAN, 4-pin CHA_FAN1/2)
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.
• The CPU_FAN connector supports the CPU fan of maximum 1A (12 W) fan power.
• If you install two VGA cards, we recommend that you plug the rear chassis fan cable
to the motherboard connector labeled CHA_FAN1 or CHA_FAN2 for better thermal
environment.
Do not forget to connect the fan cables to the fan connectors. Insufcient air ow inside the
system may damage the motherboard components. These are not jumpers! Do not place
jumper caps on the fan connectors!
P8B75-V
P8B75-V fan connectors
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
CHA_FAN1
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND
CHA_FAN2
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND