Asus Crosshair II Formula User Manual - Page 59
CPU, chassis, and optional fan connectors, pin CPU_FAN, 3-pin CHA_FAN1-3, 3-pin PWR_FAN, pin - cpu support
UPC - 610839160044
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7. CPU, chassis, and optional fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN1-3, 3-pin PWR_FAN, 3‑pin OPT_FAN1-3) The fan connectors support cooling fans of 350 mA-1000 mA (24 W max.) or a total of 1 A-3.48 A (41.76 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! PWR_FAN CPU_FAN PWR_FAN CHA_FAN1 CHA_FAN2 CHA_FAN3 CPU FAN PWM CPU FAN IN CPU FAN PWR GND Rotation +12V GND Rotation +12V GND Rotation +12V GND Rotation +12V GND CPU_FAN OPT_FAN3 CROSSHAIR II FORMULA ® CHA_FAN1 CHA_FAN2 OPT_FAN1 OPT_FAN2 OPT_FAN1 OPT_FAN2 OPT_FAN3 Rotation +12V GND Rotation +12V GND Rotation +12V GND CHA_FAN3 RESET CROSSHAIR II FORMULA FAN connectors • Only the CPU_FAN, CHA_FAN1-3, and OPT_FAN1-3 connectors support the ASUS Q-Fan Plus feature. • If you install multiple VGA cards, we recommend that you plug the chassis fan cable to the motherboard connector labled OPT_FAN1/2 for better thermal environment. ASUS Crosshair II Formula 2-33