8 . 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 fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

• Do not forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will not boot up.

•When using an ATX 12 V PSU with 20-pin power plug, make sure that it can provide 8 A on the +12 V lead and at least 1A on the +5V standby lead (+5 VSB). The minimum recommended wattage is 300 W, or 350 W for a fully configured system. The system may become unstable or may not boot up if the power is inadequate.

•You must install a Power Supply Unit (PSU) with a higher power rating if you intend to install additional devices.

ATX12V

EATXPWR

+12V DC

GND

 

 

 

 

+3 Volts

+3 Volts

 

 

-12 Volts

+3 Volts

 

 

Ground

Ground

+12V DC

GND

PSON#

+5 Volts

 

 

Ground

Ground

 

 

Ground

+5 Volts

 

 

Ground

Ground

P5P800

 

-5 Volts

Power OK

 

 

+5 Volts

+5V Standby

 

 

+5 Volts

+12 Volts

P5P800 ATX power connector

 

+5 Volts

+12 Volts

 

Ground

+3 Volts

 

 

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Chapter 2: Hardware information