User's Manual

1-16
Chapter 1: Product introduction
3. 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.
• WerecommendthatyouuseanATX12VSpecication2.0-compliantpowersupply
unit(PSU)withaminimumof300Wpowerrating.ThisPSUtypehas24-pinand4-pin
power plugs.
• IfyouintendtouseaPSUwith20-pinand4-pinpowerplugs,ensurethatthe20-pin
powerplugcanprovideatleast15Aon+12VandthatthePSUhasaminimum
powerratingof300W.Thesystemmaybecomeunstableormaynotbootupifthe
powerisinadequate.
• DONOTforgettoconnectthe4-pinATX+12Vpowerplug.Otherwise,thesystemwill
not boot up.
• WerecommendthatyouuseaPSUwithhigherpoweroutputwhenconguringa
systemwithmorepower-consumingdevicesorwhenyouintendtoinstalladditional
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.
A78M-E
A78M-E ATX power connectors
EATXPWR
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
ATX12V
PIN 1
+12V DC +12V DC
GND GND