Asus P5K PREMIUM/WIFI-AP - Pearl Special Edition Motherboard User Manual page 56

Never connect a USB cable to the IEEE 1394a connector. Doing so will damage
the motherboard!
You can attach a FireWire/1394 cable to this connector if your chassis supports
the front panel IEEE1394 port. Connect the 1394 cable to ASUS Q-Connector
(1394, red) first, and then install the Q-Connector (1394) to the 1394 connector
onboard.
6. CPU, chassis and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN1-4, 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!
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Only the CPU-FAN and CHA-FAN 1-4 connectors support the ASUS Q-Fan
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.
Chapter 2: Hardware information