Asus B85-A B85-A User's Manual - Page 24
B85-A USB3.0 Front panel connector, CPU and chassis fan connectors 4-pin CPU_FAN, 4-pin CHA_FAN
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6. USB 3.0 connector (20-1 pin USB3_12) This connector allows you to connect a USB 3.0 module for additional USB 3.0 front or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of USB 3.0 including faster data transfer speeds of up to 5Gbps, faster charging time for USB-chargeable devices, optimized power efficiency, and backward compatibility with USB 2.0. USB3_12 B85-A USB3+5V USB3+5V B85-A USB3.0 Front panel connector The USB 3.0 module is purchased separately. 7. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) 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. CPU_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND CHA FAN PWM CHA FAN IN CHA FAN PWR GND CHA_FAN1 B85-A B85-A Fan connectors 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! The CPU_FAN connector supports a CPU fan of maximum 1A (12 W) fan power. 1-16 Chapter 1: Product introduction