Connect Cooling Fans; Install System Memory - Biostar B550GTA 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.
CPU1_FAN/ OPT_FAN1: CPU Fan Header
SYS_FAN1/ SYS_FAN2: System Fan Header
Note
» CPU1_FAN, OPT_FAN1, 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 (OPT_FAN1): Support water cooling fan and CPU fan.

2.4 Install System Memory

DDR4 Modules
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
Chapter 2: Hardware installation | 11
B550GTA
Ground
Voltage Control
Sense
NC
Ground
Voltage Control
Sense
NC