• 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 ATX12V power plug; otherwise, the system will not boot.

Use of a PSU with a higher power output is recommended when configuring a system with more power-consuming devices. The system may become unstable or may not boot up if the power is inadequate.

If you want to use two high-end PCI Express x16 cards, use a PSU with 500W to 600W power or above to ensure the system stability.

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.

The ATX 12 V Specification 2.0-compliant (400W) PSU has been tested to support the motherboard power requirements with the following configuration:

CPU: Intel® Pentium® Extreme 3.73GHz

Memory: 512 MB DDR3 (x4)

Graphics card: ASUS EAX1900XT

Parallel ATA device: IDE hard disk drive

Serial ATA device: SATA hard disk drive (x2)

Optical drive: DVD-RW

9.Front panel audio connector (10-1 pin AAFP)

This connector is for a chassis-mounted front panel audio I/O module that supports either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel audio I/O module cable to this connector.

P5K/EPU

AAFP

HD Audio-compliant

Legacy AC ‘97 audio

pin definition

pin definition

SENSE2_RETUR

PORT2 L

NC

Line out_L

 

SENSE_SEND

 

NC

SENSE1_RETUR

PORT2 R

NC

Line out_R

PRESENCE#

PORT1 R

NC

MICPWR

GND

PORT1 L

AGND

MIC2

P5K/EPU Analog front panel connector

We recommend that you connect a high-definition front panel audio module to this connector to avail of the motherboard’s high-definition audio capability.

If you want to connect a high-definition front panel audio module to this connector, make sure that the Front Panel Type item in the BIOS is set to [HD Audio]. If you want to connect an AC' 97 front panel audio module to this connector, set the item to [AC97]. Refer to page 4-25 for details.

ASUS P5K/EPU

2-31

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Asus P5K/EPU manual Front panel audio connector 10-1 pin Aafp