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

 

OPT_FAN3

 

CHA_FAN1

CROSSHAIR II FORMULA

CHA_FAN2

 

 

OPT_FAN1

 

OPT_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

 

OPT_FAN1 OPT_FAN2 OPT_FAN3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rotation +12V

GND

 

 

Rotation +12V

GND

 

 

Rotation +12V

GND

 

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

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