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4-6 Chapter 3: Starting up
R
M2N5-BN
M2N5-BN ATX Power Connector
EATXPWR
+3 Volts
+3 Volts
Ground
+5 Volts
+5 Volts
Ground
Ground
Power OK
+5V Standby
+12 Volts
-5 Volts
+5 Volts
+3 Volts
-12 Volts
Ground
Ground
Ground
PSON#
Ground
+5 Volts
+12 Volts
+3 Volts
+5 Volts
Ground
ATX12V
GND
+12V DC
GND
+12V DC
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for the 24-pin and 4-pin power plugs from the
power supply unit. The plugs from the power supply unit are designed
to t these connectors in only one orientation. Find the proper
orientation and push down rmly until the connectors completely t.
Do not forget to connect the 4-pin ATX12V power plug to the ATX12V
connector on the motherboard; otherwise, the system will not boot up.