Connect Cooling Fans - Biostar B450GT Manual

2.3 Connect Cooling Fans

These fan headers support cooling-fans built in the computer. The fan cable and connector
may be different according to the fan manufacturer.
CPU_FAN1: CPU Fan Header
CPU_OPT: CPU Fan Header
SYS_FAN1/ SYS_FAN2: System Fan Header
Note
» CPU_FAN1, CPU_OPT, SYS_FAN1/ 2 support 4-pin and 3-pin head connectors. 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 pin#1(GND).
» CPU Fan Header (CPU_OPT): Support water cooling fan and CPU fan.
10 | Chapter 2: Hardware installation
Pin Assignment
1 Ground
2 +12V
3 Sense
4 Speed Control Signal
PWM Mode DC Mode
Pin Assignment Pin Assignment
1 Ground 1
2 +12V 2
3 Sense 3
4 Speed Control Signal 4
PWM Mode DC Mode
Pin Assignment Pin Assignment
1 Ground 1
2 +12V 2
3 Sense 3
4 Speed Control Signal 4
Ground
Voltage Control
Sense
NC
Ground
Voltage Control
Sense
NC