Owner's Manual

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. Insufcient air ow 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 FAN PWM
CPU FAN IN
CPU FAN PWR
GND
H81M-A
H81M-A CPU fan connector
CHA_FAN
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND
4. USB 2.0 connectors (10-1 pin USB910, USB1112)
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 specications 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.
H81M-A
USB910
PIN 1
USB+5V USB_P10- USB_P10+ GND NC
USB+5V
USB_P9-
USB_P9+
GND
USB1112
PIN 1
USB+5V USB_P12- USB_P12+ GND NC
USB+5V
USB_P11-
USB_P11+
GND
H81M-A USB2.0 connectors
Only the 4-pin CPU fan and chassis fan support the ASUS Fan Xpert feature.