Fan Headers - Biostar A770L3 Setup Manual

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
SYS_FAN1: System Fan Header
Note:
The CPU_FAN1 and SYS_FAN1 support 4-pin and 3-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.
1 4
1 3
A770L3
Pin Assignment
1 Ground
2 +12V
3
FAN RPM rate
sense
4 Smart Fan
Control (By Fan)
Pin Assignment
1 Ground
2 +12V
3
FAN RPM rate
sense
7