6.CPU, Chassis, and Power Fan Connectors (3-pin CPU_FAN, PWRFAN, CH_FAN)

The three fan connectors support cooling fans of 350mA (4.2 Watts) or a total of 1A (12W) at +12V. Orient the fans so that the heat sink fins allow air flow to go across the onboard heat sinks instead of the expansion slots. The fan wiring and plug may vary depending on the fan manufacturer. Connect the fan cable to the connector matching the black wire to the ground pin.

Do not forget to connect the fan cables to the fan connectors. Lack of sufficient air flow within the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors!

CPU_FAN

PWRFAN

P4B266

CH_FAN

P4B266 12-Volt Fan Connectors

GND

+12V

Rotation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rotation

+12V GND

GND

+12V

Rotation

 

 

 

 

 

 

 

 

 

7.USB headers (10-1 pin USB11_23)

If the USB port connectors on the rear panel are inadequate, three USB headers are available for additional USB port connectors. The header labeled USB11_23 complies with the Universal Serial Bus (USB) 1.1 specification. Connect the bundled 2-port USB connector set to this header and mount the USB bracket to an open slot in the chassis.

P4B266

P4B266 USB Header

USB11_23

NC

GND

USBP2+

USBP2–

USB Power

15

6 10

GND

USBP3+

USBP3–

USB Power

ASUS P4B266 motherboard user guide

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