Gigabyte GA-8I845GVM775 User Manual page 17

1/2) ATX_12V/ATX (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, please make sure that all
components and devices are properly installed. Align the power connector with its proper location on
the motherboard and connect tightly.
The ATX_12V power connector mainly supplies power to the CPU. If the ATX_12V power
connector is not connected, the system will not start.
Caution!
Please use a power supply that is able to handle the system voltage requirements. It is
recommended that a power supply that can withstand high power consumption be used (300W or
greater). If a power supply is used that does not provide the required power, the result can lead to an
unstable system or a system that is unable to start.
If you use a 24-pin ATX power supply, please remove the small cover on the power connector
on the motherboard before plugging in the power cord ; Otherwise, please do not remove it.
3
Pin No.
1
1
2
4
2
3
4
11
1
Pin No.
1
2
3
4
5
6
7
8
20 10
9
10
11
12
13
14
15
16
17
18
19
20
- 17 -
Definition
GND
GND
+12V
+12V
Definition
3.3V
3.3V
GND
+5V
GND
+5V
GND
Power Good
5V SB (stand by +5V)
+12V
3.3V
-12V
GND
PS_ON(soft on/off)
GND
GND
GND
-5V
+5V
+5V
Hardware Installation