6.CPU, chassis, and optional fan connectors

(4-pin CPU_FAN, 3-pin CHA_REAR_FAN, 3-pin CHA_FRONT_FAN, 3‑pin OPT_FAN1, 3-pin OPT_FAN2, 3-pin OPT_FAN3, 3-pin OPT_FAN4, 3-pin OPT_FAN5)

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!

CPU_FAN

CROSSHAIR

OPT_FAN5

CPU_FAN

OPT_FAN4

OPT_FAN3

CHA__REAR_FAN

OPT_FAN1

OPT_FAN2

CHA__FRONT_FAN

GND +12V Rotation adjustmentRPM

OPT_FAN4

 

 

 

 

 

 

 

 

 

Rotation

 

 

 

 

 

 

 

 

+12V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

OPT_FAN1 OPT_FAN5

Rotation

 

 

 

Rotation

 

 

 

+12V

 

 

 

+12V

 

 

 

 

 

 

 

GND

 

 

 

GND

 

 

 

 

 

 

 

OPT_FAN2 CHA_FRONT_FAN

 

 

 

 

 

 

 

 

 

Rotation

 

 

 

Rotation

 

 

 

+12V

 

 

 

+12V

 

 

 

 

 

 

 

GND

 

 

 

GND

 

 

 

 

 

 

 

OPT_FAN3 CHA_REAR_FAN

 

 

 

 

 

 

Rotation

 

 

 

Rotation

 

 

 

+12V

 

 

 

+12V

 

 

 

 

 

 

GND

GND

 

CROSSHAIR Fan connectors

7.Chassis intrusion connector (4-1 pin CHASSIS)

This connector is for a chassis-mounted intrusion detection sensor or switch. Connect one end of the chassis intrusion sensor or switch cable to this connector. The chassis intrusion sensor or switch sends a high-level signal to this connector when a chassis component is removed or replaced. The signal is then generated as a chassis intrusion event.

By default, the pins labeled “Chassis Signal” and “Ground” are shorted with a jumper cap. Remove the jumper caps only when you intend to use the chassis intrusion detection feature.

CROSSHAIR

+5VSB MB

Chassis Signal GND

CHASSIS

(Default)

CROSSHAIR Chassis intrusion connector

ASUS Crosshair

2-31