3.ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

These connectors are for ATX power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

ATX12V EATXPWR

DC DC

+3

Volts

+12V +12V

+12

Volts

 

+12

Volts

 

+5V Standby

 

Power OK

 

PIN 1

GND

GND GND

+5

Volts

 

GND

P7P55-M

+5 Volts

 

 

GND

 

+3

Volts

 

+3

Volts

PIN 1

P7P55-M ATX power connectors

GND

+5 Volts

+5 Volts

+5 Volts

-5 Volts

GND

GND

GND

PSON#

GND

-12 Volts

+3 Volts

• For a fully configured system, we recommend that you use a power supply unit (PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum power of 400 W.

•DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will not boot up.

•If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus. com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.

4.Digital audio connector (4-1 pin SPDIF_OUT)

This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect the S/PDIF Out module cable to this connector, then install the module to a slot opening at the back of the system chassis.

+5V

SPDIFOUT GND

P7P55-M

SPDIF_OUT

P7P55-M Digital audio connector

The S/PDIF module is purchased separately.

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Chapter 1: Product introduction