Asus P4T533 14. SMBus Connector (6-1pin SMB), 13.ATX Power Connectors (20-pinATXPWR, 4-pin12V EZ_PLUG, 4- pin ATX12V)

13.ATX Power Connectors (20-pin ATXPWR, 4-pin 12V EZ_PLUG, 4- pin ATX12V)

These connectors are intended for 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 ATXPWR 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 at least 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.

	ATXPWR		EZ_PLUG
	+3.3VDC	+3.3VDC	NC
			GND
	-12.0VDC	+3.3VDC	GND
	GND	GND	+12V
	PS_ON#	+5.0VDC
	GND	GND
	GND	+5.0VDC
	GND	GND	ATX12V
	-5.0VDC	PWR_OK
P4T533	+5.0VDC	+5VSB
	+5.0VDC	+12.0VDC	GND	GND

+12V DC +12V DC

P4T533 ATX & Auxiliary Power Connectors

14. SMBus Connector (6-1 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.

P4T533

P4T533 SMBus Connector

SMB

1
FLOATING SMBCLK	Ground SMBDATA +3V

38 Chapter 2: Hardware information