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10. CPU, chassis, and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN, 3-pin CHA_FAN2, 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-VM DO Fan connectors
Only the CPU-FAN and CHA-FAN connectors support the ASUS
Advanced Q-Fan feature.
11. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
P5B-VM DO Serial port connector
The COM module is purchased separately.
ASUS P5B-VM DO
CPU_FAN
CHA_FAN
CPU_FAN
PWR_FAN
CHA_FAN2
CHA_FAN
COM1
PIN1
PWR_FAN
GND
+12V
Rotation
CHA_FAN2
GND
+12V
Rotation
1-37
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