Asus M3N78-AM - Manual (Page 44)

1-32 Chapter 1: Product introduction
10. 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.
• We recommend that you use an ATX 12 V Specification 2.0-compliant
power supply unit (PSU) with a minimum of 300 W 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 300 W. The system may become unstable
or may not boot up if the power is inadequate.
• Do not forget to connect the 4-pin ATX +12 V power plug. Otherwise, the
system will not boot up.
• We recommend that you use a PSU with higher power output when
configuring 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.
• You must install a PSU with a higher power rating if you intend to install
additional devices.
M3N78-AM
M3N78-AM 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