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ASUS P4B266-C motherboard user guide
2-27
5. CPU, Chassis, and Power Fan Connectors
(3-pin CPU_FAN, CH_FAN, PWRFAN)
The three fan connectors support cooling fans of 350~740mA (8.88W
max.) or a total of 1~2.22A (26.64W max.) 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!
6. USB Header (10-1 pin USB11_23)
If the USB port connectors on the rear panel are inadequate, a USB
header is available for two additional USB port connectors. Connect a
2-port USB connector set to the USB header and mount the USB
bracket to an open slot in the chassis.
P4B266-C
®
P4B266-C 12-Volt Fan Connectors
CPU_FAN
PWRFAN
CH_FAN
GND
Rotation
+12V
GND
Rotation
+12V
GND
Rotation
+12V
P4B266-C
®
P4B266-C USB Header
USB11_23
NC
GND
USBP2+
USBP2–
USB Power
GND
USBP3+
USBP3–
USB Power
1
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