Gigabyte GA-MA78LM-S2 User Manual page 22

1/2) ATX_12V/ATX (2x2 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.
• The main power connector is compatible with power supplies with 2x10 power connectors.
When using a 2x12 power supply, remove the protective cover from the main power connector
on the motherboard. Do not insert the power supply cable into pins under the protective cover
when using a 2x10 power supply.
12
1
Hardware Installation
ATX:
Pin No. Definition
24
1
2
3
4
5
6
7
8
9
10
11
12
13
ATX
3 1
4 2
ATX_12V
3.3V
3.3V
GND
+5V
GND
+5V
GND
Power Good
5VSB (stand by +5V)
+12V
+12V (Only for 2x12-pin ATX)
3.3V (Only for 2x12-pin ATX)
- 22 -
ATX_12V:
Pin No. Definition
1 GND
2 GND
3 +12V
4 +12V
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 2x12-pin ATX)
24 GND (Only for 2x12-pin ATX)