Biostar H77MU3 Setup Manual - Page 10
CPU_FAN1: CPU Fan Header, SYS_FAN1: System Fan Header - cpu support
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Motherboard Manual 2.2 FAN HEADERS These fan headers support cooling-fans built in the computer. The fan cable and connector may be different according to the fan manufacturer. Connect the fan cable to the connector while matching the black wire to pin#1. CPU_FAN1: CPU Fan Header Pin Assignment 1 Ground 2 +12V 1 4 3 FAN RPM rate sense 4 Smart Fan Control SYS_FAN1: System Fan Header Pin 1 2 13 3 Assignment Ground +12V FAN RPM rate sense Note: The SYS_FAN1 supports 3-pin head connector; the CPU_FAN1 supports 4-pin head connector. When connecting with wires onto connectors, please note that the red wire is the positive and should be connected to pin#2, and the black wire is Ground and should be connected to GND. 8
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Motherboard Manual
8
2.2
FAN
H
EADERS
These fan headers support cooling-fans built in the computer. The fan
cable and connector may be different according to the fan manufacturer.
Connect the fan cable to the connector while matching the black wire to
pin#1.
CPU_FAN1: CPU Fan Header
4
1
Pin
Assignment
1
Ground
2
+12V
3
FAN RPM rate sense
4
Smart Fan Control
SYS_FAN1: System Fan Header
1
3
Pin
Assignment
1
Ground
2
+12V
3
FAN RPM rate sense
Note:
The SYS_FAN1 supports 3-pin head connector; the CPU_FAN1 supports 4-pin head
connector. When connecting with wires onto connectors, please note that the red wire is
the positive and should be connected to pin#2, and the black wire is Ground and should
be connected to GND.