Gigabyte GA-970A-DS3P Manual - Page 12

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. 42 ATX_12V: Pin No. Definition 1 GND 31 ATX_12V 2 GND 3 +12V 4 +12V ATX: 12 24 Pin No. Definition Pin No. Definition 1 3.3V 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 23 +5V (Only for 2x12-pin ATX) ATX) 1 13 12 3.3V (Only for 2x12-pin 24 GND (Only for 2x12-pin ATX) ATX) ATX 3/4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers) The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin (SYS_FAN1) and a 3-pin (SYS_FAN2) system fan headers, and a 3-pin power fan header (PWR_FAN). Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the chassis. CPU_FAN: SYS_FAN2/PWR_FAN: Pin No. Definition Pin No. Definition 1 GND 1 GND 1 2 +12V 2 +12V CPU_FAN 3 Sense 4 Speed Control 3 Sense SYS_FAN1: 1 SYS_FAN1 Pin No. 1 2 3 4 Definition GND +12V Sense Reserve 1 1 SYS_FAN2 PWR_FAN •• Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Overheating may result in damage to the CPU or the system may hang. •• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers. - 12 -