Asus A7V266 16)SMBus Connector (5-1pin SMB), 15)Power Supply Connectors (20-pinblock ATXPWR), IMPORTANT: Make sure that the ATX 12V power supply (minimum

.3 H/WConnectors SETUP

3.HARDWARE SETUP

15)Power Supply Connectors (20-pin block ATXPWR)

This connector connects to an ATX 12V power supply. The plug from the power supply fits in only one orientation because of the different hole sizes. Find the proper orientation and push down firmly making sure 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.

		+12.0Volts	+5.0 Volts
	1
		+5V Standby	+5.0 Volts
		Power Good	-5.0 Volts
		Ground	Ground
		+5.0 Volts	Ground
		Ground	Ground
		+5.0 Volts	Power Supply On
		Ground	Ground
		+3.3 Volts	-12.0Volts
A7V266		+3.3 Volts	+3.3Volts

A7V266 ATX Power Connector

16)SMBus Connector (5-1 pin SMB)

This connector allows you to connect 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 specific implementation of an I2C bus, a multi-device bus that allows multiple chips to connect to the same bus and

enabling each one to act as a master by initiating data transfer.

A7V266

A7V266 SMBus Connector

SMB_COM

1

SMBCLK Ground SMBDATA +3V

38 ASUS A7V266 User’s Manual