IWILL UPX, User Manual, Page: 28 / 78

Hardware Installation
buzzer. If you want to use external case-mounted speaker instead of
internal buzzer, remove jumper cap and connect speaker wire to the 4-pin
connector.
9. ATX Power Switch / Soft Power Header (2-pin PWR_SW)
A momentary switch connected to these connector controls the system
power. Pressing the button once it will switch the system between
ON and
SLEEP. The system power LED shows the status of the system’s power.
10. System Power LED Header (3-pin PWR_LED)
This 3-pin connector connects the system power LED, which lights up
when the system is powered on and blinks when it is in sleep mode.
11. CPU and Aux Fan Connectors (4 3-pin FAN connectors):
There are four 3-pin fan connectors in the UPX M/B. Two fans are used for
CPU1 and CPU2 and two are for auxiliary power. These connectors
support cooling fans of 500mA (6W) or less. Depending on the fan
manufacturer, the wiring and plug may be different. The red wire should be
positive, while the black should be ground. Connect the fan’s plug to the
board taking into consideration the polarity of this connector.
F r o n t F A N 2
S Y S F A N 3
F r o n t F A N 1
C P U F A N 1
C P U F A N 2
S Y S F A N 1
G N D + 5 v + 1 2 v
S Y S F A N 2
1-14
UPX Fan Connectors