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SMBus Header
This is a SMBus interface header (2.54mm pitch).
SPI Header
The SPI header (1.27mm pitch) is for SPI signal interface.
Fan Headers
There are two headers (CPUFAN and SYSFAN, 2.54mm pitch) on the
motherboard. These fans can be speed detected/controlled and displayed in the
Hardware Health Configuration section of the CMOS Setup. The fans are
automatically turned off after the system enters S3, S4 or S5 mode.
Pin
Definition
1
+3.3V Standby
2
SMBus CLOCK
3
SMBUS DATA
4
GND
Pin
Definition
Pin
Definition
1
CS
2
VDD
3
SO
4
SOLD
5
WP
6
CLK
7
VSS
8
SI
Pin
Definition
1
GND
2
+12V
3
Sense
4
Control
Pin
Definition
1
GND
2
+12V
3
Sense
Note:
The CPU fan cable can be either a
3-pin or a 4-pin connector.
Connect a 3-pin connector to
pins 1, 2, and 3 on the mainboard
connector.
1
4
1
3
1
1
2
7
8
