Gigabyte GA-M55S-S3 Manual - Page 19

ATX_12V / ATX Power Connector

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English 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 (400W 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. 2 1 4 3 ATX_12V Pin No. 1 2 3 4 Definition GND GND +12V +12V 12 24 1 13 ATX Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Definition 3.3V 3.3V GND +5V GND +5V GND Power Good 5V SB(stand by +5V) +12V +12V(Only for 24-pin ATX) 3.3V(Only for 24-pin ATX) Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 Definition 3.3V -12V GND PS_ON(soft On/Off) GND GND GND -5V +5V +5V +5V (Only for 24-pin ATX) GND(Only for 24-pin ATX) - 19 - Hardware Installation

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Hardware Installation
- 19 -
English
Pin No.
Definition
1
GND
2
GND
3
+12V
4
+12V
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 connec-
tor 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 recom-
mended that a power supply that can withstand high power consumption be used (400W 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.
13
1
24
12
Pin No.
Definition
13
3.3V
14
-12V
15
GND
16
PS_ON(soft On/Off)
17
GND
18
GND
19
GND
20
-5V
21
+5V
22
+5V
23
+5V (Only for 24-pin
ATX)
24
GND(Only for 24-pin
ATX)
Pin No.
Definition
1
3.3V
2
3.3V
3
GND
4
+5V
5
GND
6
+5V
7
GND
8
Power Good
9
5V SB(stand by +5V)
10
+12V
11
+12V(Only for 24-pin
ATX)
12
3.3V(Only for 24-pin
ATX)
ATX
4
3
2
1
ATX_12V