Asus A7V333 A7V333 User Manual - Page 48

13) Power Supply Connectors (20-pin block ATXPWR) This connector supports an ATX 12V power supply. The plug from the power supply fits in only one orientation. Push down firmly ensuring that the pins are aligned. IMPORTANT! Make sure that the ATX 12V power supply (minimum recommended wattage: 230W) can supply at least 10mA on the +5-volt standby lead (+5VSB). The system may become unstable and may experience difficulty powering up if the power supply is inadequate. For Wake-On-LAN support, the ATX power supply must supply at least 720mA +5VSB. A7V333 ® ATXPWR Pin 1 +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 A7V333 ATX Power Connectors 14) SMBus Connector (5-1 pin SMB) This connector supports SMBus (System Management Bus) devices. SMBus devices communicate by means of the SMBus with an SMBus host and/or other SMBus devices. SMBus is a multi-device bus that permits multiple chips to connect to the same bus and enable each one to act as a master by initiating data transfer. A7V333 ® A7V333 SMBus Connector SMB 1 SMBCLK Ground SMBDATA +3V 36 Chapter 2: Hardware information