Asus P5G31D-M PRO T-P5G31 user's manual - Page 50

2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) These connectors are for the 24-pin and 4-pin power plugs from the power supply unit. The plugs from the power supply unit are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit. Do not forget to connect the 4-pin ATX12V power plug to the ATX12V connector on the motherboard. Otherwise, the system will not boot up. EATXPWR ATX12V +3 Volts +3 Volts Ground +5 Volts Ground +5 Volts Ground Power OK +5V Standby +12 Volts +12 Volts +3 Volts +12V DC GND +3 Volts -12 Volts Ground PSON# Ground Ground Ground -5 Volts +5 Volts +5 Volts +5 Volts Ground +12V DC GND R P5K18L P5K18L ATX Power Connector 3. IDE connector (40-1 pin PRI_IDE) This connector is for an IDE 100/66 signal cable, a blue connector for the primary IDE connector on the motherboard PRI_IDE R P5K18L P5K18L IDE Connector PIN1 NOTE: Orient the red markings (usually zigzag) on the ID ribbon cable to PIN 1. • Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA cable connector. This prevents incorrect insertion when you connect the IDE cable. • Use the 80-conductor IDE cable for Ultra DMA 100/66 IDE devices. 4- Chapter 4: Motherboard Info