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CPU Fan Connectors
(4-pin CPU_FAN1)
(see p.8, No. 7)
(4-pin CPU_FAN2)
(see p.8, No. 13)
3W Audio AMP Output Wafer
(4-pin SPEAKER1)
(see p.8, No. 28)
COM Port Headers (RS232)
(9-pin COM2, COM4,
COM5, COM6)
(see p.8, No. 19)
Chassis Intrusion Headers
(2-pin CI1, CI2: see p.8, No. 21)
GND
1
+12V
2
FAN_SPEED
3
FAN_SPEED_CONTROL
4
FAN_SPEED_CONTROL
4
FAN_SPEED
3
+12V
2
GND
1
1
1
GND
Signal
20
Though this motherboard
provides a 4-Pin CPU fan
(Quiet Fan) connector, 3-Pin
CPU fans can still work suc-
cessfully even without fan
speed control. If you plan to
connect a 3-Pin CPU fan,
please connect it to Pin 1-3.
PIN
Signal Name
1
SPK R-
2
SPK R+
3
SPK L+
4
SPK L-
These COM headers sup-
port serial port modules.
This motherboard supports
CASE OPEN detection
feature that detects if the
chassis cover has been
removed. This feature
requires a chassis with
chassis intrusion detection
design.
CI1:
Close: Active Case Open
Open: Normal
Cl2:
Close: Normal
Open: Active Case Open
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