Asus P5B Premium Vista P5B Premium Quick Installation Guide - Page 60
CPU, chassis and power fan connectors, pin CPU_FAN, 3-pin CHA_FAN1-3, 3-pin PWR_FAN
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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 GND CPU FAN PWR CPU FAN IN CPU FAN PWM CPU_FAN PWR_FAN Rotation +12V GND CHA_FAN2 GND +12V Rotation CHA_FAN1 CHA_FAN3 GND +12V Rotation GND +12V Rotation P5B PREMIUM Fan connectors • Only the CPU-FAN and CHA-FAN 1-3 connectors support the ASUS QFAN 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. 2-32 Chapter 2: Hardware information