Biostar B550MH 3.0 User Manual

Chapter 2: Hardware installaon | 11
B550MH 3.0
2.3 Connect Cooling Fans
These fan headers support cooling-fans built in the computer. The fan cable and connector
may be dierent according to the fan manufacturer.
CPU_FAN: CPU Fan Header
Pin Assignment
1 Ground
2 +12V
3 FAN RPM rate sense
4 AI Fan Control
SYS_FAN1: System Fan Header
Pin Assignment
1 Ground
2 +12V
3 FAN RPM rate sense
4 AI Fan Control
Note
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CPU_FAN, SYS_FAN1 support 4-pin and 3-pin head connectors. When connecng with wires onto
connectors, please note that the red wire is the posive and should be connected to pin#2, and the
black wire is Ground and should be connected to pin#1(GND).

Biostar B550MH 3.0 Specifications

General

Form Factor	Micro ATX
Chipset	AMD B550
Socket	AM4
Maximum Memory	64GB
LAN	Realtek RTL8111H Gigabit LAN
PCIe Slots	1 x PCIe 4.0 x16, 1 x PCIe 3.0 x1
Storage Interface	4 x SATA III
USB Ports	4 x USB 3.2 Gen1 (2 front, 2 rear), 2 x USB 2.0 (2 rear), 2 x USB 2.0 (Front)
Audio	Realtek ALC887 7.1-Channel
Video Outputs	HDMI, DVI-D
Memory Slots	2 x DIMM