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ASUS P4B266 motherboard user guide
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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!
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 12-Volt Fan Connectors
CPU_FAN
PWRFAN
CH_FAN
GND
Rotation
+12V
GND
Rotation
+12V
GND
Rotation
+12V
P4B266
®
P4B266 USB Header
USB11_23
USB Power
USBP2–
USBP2+
GND
NC
USB Power
USBP3–
USBP3+
GND
15
610