Chapter 5: Advanced Motherboard Setup
5-13
Fan Header
Pin Definitions
Pin# Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM_Control
Fan Headers
There are three fan 4-pin headers.
Pins 1-3 are backward compatible
with the traditional 3-pin fans, but you
can use 4-pin fans to take advantage
of the fan speed control using Pulse
Width Modulation through the BMC.
This allows the fan speeds to be
automatically adjusted based on the
motherboard temperature. Refer to
the table on the right for pin definitions.
Internal Buzzer (SP1)
The Internal Buzzer (SP1) can be
used to provide audible indications for
various beep codes. See the table on
the right for pin definitions.
Internal Buzzer
Pin Definition
Pin# Definitions
Pin 1
Pos. (+)
5V
Pin 2
Neg. (-)
Beep In
DOM PWR Connector (JSD1)
The Disk-On-Module (DOM) power
connector, located at JSD1/JSD2,
provides 5V (Gen1/Gen) power to
a solid-state DOM storage device
connected to one of the SATA ports.
See the table on the right for pin
definitions.
DOM PWR
Pin Definitions
Pin# Definition
1
5V
2
Ground
3
Ground
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