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Fan Header
This motherboard has one system cooling
fan header (Fan 3) on the motherboard.
This 4-pin fan header is backward com-
patible with the traditional 3-pin fans.
However, fan speed control is available
for 4-pin fans only. The fan speeds are
controlled by Thermal Management via
the IPMI 2.0 interface. See the table on
the right for pin definitions.
LE1
VGA
JB1
A
C
1
UID
JVGA
JUIDB1
JIB1
1
3
QSFP
1
JB3
1
JB2
3
JP1
1
JP2
JBT1:
CMOS
CLEAR
MH1
CPU1
CLOSE 1st
CPU2
CLOSE 1st
A
COM1
JCOM1
LAN2
LAN1
C
LEDBMC
JUSBRJ45
JSTBY1
1
JPB1:BMC
1-2:ENABLE
2-3:DISABLE
BT1
1
1
JSD2
+
OPEN 1st
OPEN 1st
2-23
Chapter 2: Installation
Fan Header
Pin Definitions
Pin#
Definition
1
Ground
2
+12V
3
Tachometer
4
PWR Modulation
A. Fan 3
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