5.Serial port connector
This connector is for a serial (COM) port. Connect the serial port module cable to this connector, then install the module to a slot opening at the back of the system chassis.
Z7S WS
COM1
Z7S WS Serial port connectors PIN1
The serial port module is purchased separately.
6.CPU and system fan connectors
The fan connectors support cooling fans of 350 mA ~ 740 mA (8.88 W max.) or a total of 3.15 A ~ 6.66 A (53.28 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!
SPS_FAN1
FBD_FAN1 
Z7S WS | CPU0_FAN |
| CPU1_FAN |
CHA_FAN1
CHA_FAN2
CHA_FAN3
CHA_FAN4 
Z7S WS Fan connectors
SPS_FAN1 | FBD_FAN1 | ||
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| FAN Power |
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GND FAN Power FAN Speed PWM Control | GND FAN Power FAN Speed PWM Control | GND FAN Power FAN Speed PWM Control |
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CHA_FAN1 CHA_FAN2 CHA_FAN3 CHA_FAN4
ASUS Z7S WS |