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Chapter 4: Motherboard Connections
Important:
To provide adequate power to the motherboard, connect the 24-pin
and
the 8-pin
power connectors to the power supply. Failure to do so may void the manufacturer's warranty
on your power supply and motherboard.
12V 8-pin Auxilliary Power Connector (JPWR1)
JPWR1 is an 8-pin ATX power input to provide auxiliary power to the processor. Refer to the
table below for pin definitions.
12V 8-pin Power Connector
Pin Definitions
Pins
Definition
1 through 4
Ground
5 through 8
+12V
Power SMB Header (PWRI
2
C)
Power System Management Bus (I
2
C) header monitors power supply, fan and system
temperatures. See the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PWR Fail
4
Ground
5
+3.3V