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Chapter 3: Motherboard Connections
3.2 Headers and Connectors
Fan Headers
There are seven fan headers on the motherboard. These are 4-pin fan headers; pins 1-3
are backward compatible with traditional 3-pin fans. The onboard fan speeds are controlled
by Thermal Management (via Hardware Monitoring) in the BMC. When using Thermal
Management setting, use all 4-pin fans.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM Control
12V 8-pin Auxilliary Power Connector (JPWR1)
JPWR1 is an 8-pin ATX power input to provide core 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
12V 8-pin Auxilliary Power Connector (JPWR2)
JPWR2 is an 8-pin ATX power input to provide core 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