Manual

3-10 Chapter 3: Motherboard info

•

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 ATX12V power plug; otherwise, the

system will not boot.

• Use of a PSU with a higher power output is recommended 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.

• The ATX 12 V Specication 2.0-compliant (300W) PSU has been tested to

support the motherboard power requirements.

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

These connectors are for ATX power supply plugs. The power supply plugs

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

orientation and push down rmly until the connectors completely t.

M4A78LT-M LE

M4A78LT-M LE ATX power connectors

EATXPWR

ATX12V

PIN 1

+12V DC

GND

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