- 13 -
3/4) CPU_FAN/SYS_FAN (Fan Headers)
All fan headers on this motherboard are 4-pin. Most fan headers possess a foolproof insertion design.
When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is
the ground wire). The speed control function requires the use of a fan with fan speed control design. For
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
DEBUG
PORT
G.QBOFM
13
1
24
12
ATX
ATX:
Pin No.
Definition
Pin No.
Definition
1
3.3V
13
3.3V
2
3.3V
14
-12V
3
GND
15
GND
4
+5V
16
PS_ON (soft On/Off)
5
GND
17
GND
6
+5V
18
GND
7
GND
19
GND
8
Power Good
20
NC
9
5VSB (stand by +5V)
21
+5V
10
+12V
22
+5V
11
+12V (Only for 2x12-pin
ATX)
23
+5V (Only for 2x12-pin ATX)
12
3.3V (Only for 2x12-pin
ATX)
24
GND (Only for 2x12-pin ATX)
CPU_FAN:
Pin No.
Definition
1
GND
2
+12V
3
Sense
4
Speed Control
•
Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Overheating
may result in damage to the CPU or the system may hang.
•
These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers.
SYS_FAN
CPU_FAN
DEBUG
PORT
G.QBOFM
1
DEBUG
PORT
G.QBOFM
1
1/2) ATX_12V_2X4/ATX (2x4 12V Power Connector and 2x12 Main Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the components
on the motherboard. Before connecting the power connector, first make sure the power supply is turned
off and all devices are properly installed. The power connector possesses a foolproof design. Connect the
power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected,
the computer will not start.
To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption
be used (500W or greater). If a power supply is used that does not provide the required power, the result can
lead to an unstable or unbootable system.
ATX_12V_2X4:
Pin No.
Definition
Pin No.
Definition
1
GND (Only for 2x4-pin 12V)
5
+12V (Only for 2x4-pin 12V)
2
GND (Only for 2x4-pin 12V)
6
+12V (Only for 2x4-pin 12V)
3
GND
7
+12V
4
GND
8
+12V
DEBUG
PORT
G.QBOFM
ATX_12V_2X4
5
8
1
4
SYS_FAN:
Pin No.
Definition
1
GND
2
+12V/Speed Control
3
Sense
4
VCC
Summary of Contents for GA-H81M-HD3
Page 1: ...GA H81M HD3 User s Manual Rev 2002 12ME H81MHD3 2002R ...
Page 35: ... 35 ...
