1) ATX_12V (+12V Power Connector)

This connector (ATX_12V) supplies the CPU operation voltage (Vcore).

If this "ATX_12V connector" is not connected, system cannot boot.

2

 

Pin No.

Definition

1

1

GND

4

3

2

GND

3

+12V

 

 

 

 

4

+12V

2) ATX (ATX Power)

AC power cord should only be connected to your power supply unit after ATX power cable and other related devices are firmly connected to the mainboard.

 

 

Pin No.

Definition

 

 

1

3.3V

 

 

2

3.3V

 

 

3

GND

10

20

4

VCC

5

GND

 

 

 

 

6

VCC

 

 

7

GND

 

 

8

Power Good

 

 

9

5V SB (stand by +5V)

 

 

10

+12V

 

 

11

3.3V

 

 

12

-12V

 

 

13

GND

1

11

14

PS_ON(soft on/off)

15

GND

 

 

16

GND

 

 

17

GND

 

 

18

-5V

 

 

19

VCC

 

 

20

VCC

English

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Hardware Installation Process

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Gigabyte GA-8IR2003 manual ATX12V +12V Power Connector, ATX ATX Power