Gigabyte GA-H55M-USB3 Manual - Page 23
ATX_12V_2X4/ATX 2x4 12V Power Connector and 2x12 Main Power Connector - power supply
UPC - 818313009951
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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 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. • Use of a power supply providing a 2x4 12V power connector is recommended by the CPU manufacturer when using an Intel Extreme Edition CPU (130W). • 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. 5 8 1 4 ATX_12V_2X4 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 ATX: 12 24 Pin No. Definition 1 3.3V Pin No. Definition 13 3.3V 2 3.3V 14 -12V 3 GND 15 GND 4 +5V 16 PS_ON (soft On/Off) 5 GND 17 GND 6 +5V 18 GND 7 GND 19 GND 8 Power Good 20 -5V 9 5VSB (stand by +5V) 21 +5V 10 +12V 22 +5V 11 +12V (Only for 2x12-pin ATX) 23 +5V (Only for 2x12-pin ATX) 1 13 12 3.3V (Only for 2x12-pin ATX) 24 GND (Only for 2x12-pin ATX) ATX - 23 - Hardware Installation