Asus B85M-K - Manual (Page 24)

1-16 Chapter 1: Product introduction
3. 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.
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.
CPU_FAN
CPU F
AN PWM
CPU F
AN IN
CPU F
AN PWR
GND
B85M-K
B85M-K CPU fan connector
CHA_FAN
VCC
CHA
F
AN IN
CHA
F
AN PWR
GND
4. USB 2.0 connectors (10-1 pin USB78, USB56)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specifications and supports up to
480Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
B85M-K
USB78
PIN 1
USB+5V USB_P7- USB_P7+ GND NC
USB+5V USB_P8- USB_P8+
GND
USB56
PIN 1
USB+5V USB_P5- USB_P5+ GND NC
USB+5V USB_P6- USB_P6+
GND
B85M-K USB2.0 connectors
Only the 4-pin CPU fan support the ASUS Fan Xpert feature.