7.ATX power connectors(20-pin ATXPWR, 4-pin ATX12V)

These connectors connect to an ATX 12V 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.

In addition to the 20-pin ATXPWR1 connector, this motherboard requires that you connect the 4-pin ATX +12V power plug to provide sufficient power to the CPU.

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

•Make sure that your ATX 12V power supply can provide 12A on the +12V lead and at least 1A on the +5-volt standby lead (+5VSB). The minimum recommended wattage is 300W, or 350W for a fully configured system. The system may become unstable or may not boot up if the power is inadequate.

ATXPWR

ATX12V

Pin 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+12.0VDC

 

 

 

 

 

+5.0VDC

+12V DC

 

 

 

 

 

 

 

 

 

+12V DC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5VSB

 

 

 

 

 

+5.0VDC

GND

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWR_OK

 

 

 

 

 

-5.0VDC

 

 

 

 

 

 

 

 

 

 

 

COM COM

+5.0VDC COM

K8V

COM

COM

+5.0VDC PS_ON#

COM COM

+3.3VDC -12.0VDC

+3.3VDC +3.3VDC

K8V ATX Power Connectors

2-28

Chapter 2: Hardware information