3.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 ATX power 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 12A on the +12V lead and at least 2A on the +5-volt standby lead (+5VSB). The minimum recommended wattage is 250W, 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 GND

Pin 1

 

 

+12.0VDC

+5.0VDC

 

 

 

 

+5VSB

+5.0VDC

 

 

PWR_OK

-5.0VDC

 

 

COM

COM

P4B533-X

+12V DC GND

+5.0VDC

COM

 

COM

COM

 

 

 

 

+5.0VDC

PS_ON#

 

 

COM

COM

 

 

+3.3VDC

-12.0VDC

 

 

+3.3VDC

+3.3VDC

P4B533-X ATX Power Connector

4.Internal audio connectors (4-pin CD1, AUX1)

These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card.

CD1(Black)

Right Audio Channel

Ground

Ground

Left Audio Channel

P4B533-XAUX1(White)

Right Audio Channel

Ground

Ground

Left Audio Channel

P4B533-X Internal Audio Connectors

1-18

Chapter 1: Product introduction