Asus P4XP-X User Manual - Page 27

5. ATX power connectors (20-pin ATXPWR1, 4-pin ATX12V1) These connectors connect to an ATX 12V power supply. The plugs from the power supply are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit. In addition to the 20-pin ATXPWR1 connector, this motherboard requires that you connect the 4-pin ATX +12V power plug to provide sufficient power to the CPU. Make sure that your ATX 12V power supply can provide 8A on the +12V lead and at least 1A on the +5-volt standby lead (+5VSB). The minimum recommended wattage is 230W, or 300W for a fully configured system. The system may become unstable and may experience difficulty powering up if the power supply is inadequate. ATX12V1 ATXPWR1 +12V DC COM ® P4XP-X +12V DC COM P4XP-X ATX Power Connectors +12.0VDC +5VSB PWR_OK COM +5.0VDC COM +5.0VDC COM +3.3VDC +3.3VDC +5.0VDC +5.0VDC -5.0VDC COM COM COM PS_ON# COM -12.0VDC +3.3VDC 6. SMBus connector (6-1 pin SMB1) This connector allows you to connect SMBus (System Management Bus) devices. Devices communicate with an SMBus host and/or other SMBus devices using the SMBus interface. ® P4XP-X P4XP-X SMBus Connector SMB1 1 FLOATING SMBCLK Ground SMBDATA +3V ASUS P4XP-X motherboard user guide 1-17