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Chapter 4: Motherboard Connections
Fan Headers
There are five 4-pin fan headers (FAN1 ~ FAN4, FANA) on the motherboard.
All these 4-pin
fan headers are backwards compatible with the traditional 3-pin fans. However, fan speed
control is available for 4-pin fans only by Thermal Management via the IPMI 2.0 interface.
Refer to the table below for pin definitions.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
5A/+12V (Red)
3
Tachometer
4
PWM_Control
SGPIO Headers
There is one Serial Link General Purpose Input/Output (S-SGPIO1) header located on the
motherboard. S-SGPIO is for sSATA use. Refer to the tables 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
Disk-On-Module Power Connector
The Disk-On-Module (DOM) power connectors at JSD1 and JSD2 provide 5V power to a
solid state DOM storage device connected to one fo the SATA ports. Refer to the table below
for pin definitions.
DOM Power
Pin Definitions
Pin#
Definition
1
5V
2
Ground
3
Ground