Gigabyte GA-790XT-USB3 User Manual page 23

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 com-
ponents 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 con-
nector 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 power connectors are compatible with power supplies with 2x2 12V and 2x10 power
connectors. When using a power supply providing a 2x4 12V and a 2x12 power connector,
remove the protective covers from the 12V power connector and the main power connector on
the motherboard. Do not insert the power supply cables into pins under the protective covers
when using a power supply providing a 2x2 12V and a 2x10 power connector.
12
1
ATX:
Pin No.
24
1
2
3
4
5
6
7
8
9
10
11
12
13
ATX
8 4
5 1
ATX_12V_2X4
Definition
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)
- 23 -
ATX_12V_2X4:
Pin No. Definition
1 GND (Only for 2x4-pin 12V)
2 GND (Only for 2x4-pin 12V)
3 GND
4 GND
5 +12V (Only for 2x4-pin 12V)
6 +12V (Only for 2x4-pin 12V)
7 +12V
8 +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)
Hardware Installation