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8. CPU, CPU OPT, Chassis fan connectors
(4-pin CPU_FAN; 4-pin CPU_OPT; 4-pin CHA_FAN1/2/3/4)
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.
• The CPU_FAN connector supports the CPU fan of maximum 2A (24 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, CHA_FAN2, CHA_FAN3 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!
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Chapter 2: Hardware information