MSI B550M PRO-VDH WIFI User Manual

36
Overview of Components
CPU_FAN1, PUMP_FAN1, SYS_FAN1~3: Fan Connectors
Fan connectors can be classified as PWM (Pulse Width Modulation) Mode or DC Mode.
PWM Mode fan connectors provide constant 12V output and adjust fan speed with
speed control signal. DC Mode fan connectors control fan speed by changing voltage.
The auto mode fan connectors can automatically detect PWM and DC mode. However,
you can follow the instruction below to adjust the fan connector to PWM or DC Mode
manually.
Switching fan mode and adjusting fan speed
You can switch between PWM mode and DC mode and adjust fan speed in BIOS >
HARDWARE MONITOR.
Select PWM mode or DC mode
⚠
Important
Make sure fans are working properly after switching the PWM/ DC mode.
There are gradient points of the fan speed that allow you to adjust
fan speed in relation to CPU temperature.
Pin definition of fan connectors
CPU_FAN1
SYS_FAN3
PUMP_FAN1
SYS_FAN1
SYS_FAN2
Connector
Default fan
mode
Max.
current
Max.
power
CPU_FAN1 Auto mode 2A 24W
PUMP_FAN1 PWM mode 3A 36W
SYS_FAN1~3 DC mode 1A 12W
1
PWM Mode pin definition
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
1
DC Mode pin definition
1 Ground 2 Voltage Control
3 Sense 4 NC

MSI B550M PRO-VDH WIFI Specifications

General

Processor socket	Socket AM4
Processor manufacturer	AMD
Compatible processor series	-
Audio chip	Realtek ALC892 / Realtek ALC897
Component for	PC
Motherboard chipset	AMD B550
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Windows operating systems supported	Windows 10 x64
Bluetooth	Yes
LAN controller	Realtek RTL8111H
Bluetooth version	4.2
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
WLAN controller model	Intel Dual Band Wireless-AC 3168
Ethernet interface type	Gigabit Ethernet
Memory channels	Dual-channel
Memory slots type	DIMM
Number of memory slots	4
Supported memory types	DDR4-SDRAM
Maximum internal memory	128 GB
Supported memory clock speed (max)	4400 MHz
RAID levels	0, 1, 10
Supported storage drive interfaces	M.2, SATA III
PCI Express x1 (Gen 3.x) slots	2
PCI Express x16 (Gen 4.x) slots	1
DirectX version	12.0
USB 3.2 Gen 1 (3.1 Gen 1) connectors	3
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.