Asus A7V333-X - Manual (Page 26)

1-16 Chapter 1: Motherboard Information
Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
6. CPU and Chassis Fan Connectors
(3-pin CPU_FAN1, CHA_FAN1)
The fan connectors support cooling fans of 350mA~740mA (8.88W
max.) or a total of 1A~2.22A (26.64W 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.
A7V333-X ®
A7V333-X 12-Volt Fan Connectors
CPU_FAN1
CHA_FAN1
GND Rotation +12V
GND
Rotation
+12V
A7V333-X ®
A7V333-X Chassis Alarm Lead
CHASSIS1
+5VSB_MB Chassis Signal GND
7. Chassis intrusion connector (4-1 pin CHASSIS1)
This lead is for a chassis designed with intrusion detection feature. This
requires an external detection mechanism such as a chassis intrusion sensor
or microswitch. When you remove any chassis component, the sensor
triggers and sends a high-level signal to this lead to record a chassis
intrusion event.
By default, the pins labeled “Chassis Signal” and “Ground” are shorted with a
jumper cap. If you wish to use the chassis intrusion detection feature, remove
the jumper cap from the pins.