Asus M2N-LR - Motherboard - ATX, User Manual, Page: 45 / 113

2-2 Chapter 2: Hardware information
8. ATX power connectors (24-pin ATXPWR1, 4-pin ATX12V)
These connectors are for an ATX power supply plugs. The power supply
plugs 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.
• Use of a PSU with a higher power output is recommended when
configuring a system with more power-consuming devices. The system
may become unstable or may not boot up if the power is inadequate.
• Make sure that your power supply unit (PSU) can provide at least the
minimum power required by your system. See the table below for details.
9. Power Supply SMBus connector (5-pin PSUSMB1)
This connector allows you to connect SMBus (System Management Bus)
devices to the power supply unit. Devices communicate with an SMBus host
and/or other SMBus devices using the SMBus interface.
M2N-LR/SATA
®
M2N-LR/SATA ATX Power Connector
+3
Vo
lts
+3
Vo
lts
5
Vo
lts
+5
Vo
lts
Ground Ground Power O
K
+5V S12
Vo
lts
-5 V
olts
+5
Vo
lts
+3
Vo
lts
-12
Vo
lts
Ground Ground Ground
PSON#
Ground
+5
Vo
lts
+12
Vo
lts
+3
Vo
lts
+5
Vo
lts
Ground
ATXPWR1
ATX12V1
+1
2V
D
C
G
ND
+1
2V
D
C
G
ND
M2N-LR/SATA
®
M2N-LR/SATA Power Supply SMBus Connector
PSUSMB1
+3.3V Remote Sense
GND
NC
PSU_I2CDA
TA
PSU_I2CCL
K