Asus P5B Premium Series Hardware User Manual page 60

8. CPU, chassis and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN1-3, 3-pin PWR_FAN
The fan connectors support cooling fans of 350 mA ~ 2000 mA (24 W max.)
or a total of 1 A ~ 7 A (84 W max.) at +12V. Connect the fan cables to the
fan connectors on the motherboard, making sure 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!
P5B PREMIUM Fan connectors
•
•
2-32
Only the CPU-FAN and CHA-FAN 1-3 connectors support the ASUS Q-
FAN 2 feature.
If you install two VGA cards, we recommend that you plug the rear
chassis fan cable to the motherboard connector labled CHA_FAN1
or CHA_FAN2 for better themal environment.
CPU_FAN PWR_FAN
Rotation
+12V
GND
CHA_FAN2
GND
+12V
Rotation
CHA_FAN1 CHA_FAN3
Chapter 2: Hardware information