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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
Fan Headers
There are eight 4-pin fan headers on the motherboard. Pins 1-3 are backward compatible
with traditional 3-pin fans. The onboard fan speeds are controlled by Thermal Management
via IPMI. When using Thermal Management setting, use all 3-pin fans or all 4-pin fans.
Required Connection
8-pin Power
Pin Definitions
Pin#
Definition
1 - 4 Ground
5 - 8 P12V (12V Power)
8-Pin Power Connector
JPWR1 is an 8-pin 12V DC power input for the processors, which must be connected to the
power supply. Refer to the table below for pin definitions.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
2.5A/+12V (Red)
3
Tachometer
4
PWM_Control
SGPIO Header
There is one Serial Link General Purpose Input/Output (S-SGPIO1) header located on the
motherboard. Refer to the table below for pin definitions.
SGPIO Header
Pin Definitions
Pin#
Definition Pin#
Definition
1
NC
2
NC
3
Ground
4
Data
5
Load
6
Ground
7
Clock
8
NC
NC = No Connection
