User`s manual

A770 A2+/A740X A2+
7
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.
CPUFAN: CPU Fan Header
Pin
Assignment
1 Ground
2 +12V
3
FAN RPM rate
sense
14
4 Smart Fan
Control (By Fan)
SYSFAN: System Fan Headers
Pin Assignment
1 Ground
2 +12V
1
3
3
FAN RPM rate
sense
Note:
The CPUFAN and SYSFAN support 4- pin and 3-pin head connector. When connecting
with wires ont o c onnect ors, please note that the red wire is t he positi ve and s houl d be
connected t o pi n#2, and the bl ac k wire is Ground and s hould be c onnect ed to GND.