User guide

1-22

Chapter 1: Product introduction

Chapter 1

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

These connectors are for an ATX power supply. The plugs from the power supply are

designed to t these connectors in only one orientation. Find the proper orientation and

push down rmly until the connectors completely t.

• For a fully congured system, we recommend that you use a power supply unit

(PSU) that complies with ATX 12 V Specication 2.0 (or later version) and provides a

minimum power of 300 W.

• DO NOT forget to connect the 4-pin ATX12 V power plug; otherwise, the system will

not boot.

• We recommend that you use a PSU with higher power output when conguring a

system with more power-consuming devices. The system may become unstable or

may not boot up if the power is inadequate.

• 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.

• If you want to use two high-end PCI Express x16 cards, use a PSU with 1000W power

or above to ensure the system stability.

M5A97 LE R2.0

M5A97 LE R2.0 ATX power connectors

EATXPWR

PIN 1

GND

+5 Volts

-5 Volts

GND

PSON#

GND

-12 Volts

+3 Volts

+12 Volts

+5V Standby

Power OK

GND

+5 Volts

GND

+5 Volts

GND

+3 Volts

ATX12V

PIN 1

+12V DC

GND