MSI B450M GAMING PLUS User Manual

14
Overview of Components
CPU_FAN1, SYS_FAN1~2: 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. When you plug a 3-pin (Non-PWM) fan to a fan connector in PWM mode, the
fan speed will always maintain at 100%, which might create a lot of noise. You can
follow the instruction below to adjust the fan connector to PWM or DC Mode.
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.
Default PWM Mode
fan connector
Default DC Mode fan
connector
1
CPU_FAN1
1
SYS_FAN1/
SYS_FAN2
PWM Mode pin definition
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
DC Mode pin definition
1 Ground 2 Voltage Control
3 Sense 4 NC
Pin definition of fan connectors

MSI B450M GAMING PLUS Specifications

General

Audio chip	Realtek ALC887
Cooling type	Passive
Component for	PC
Motherboard chipset	AMD B450
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Number of mounting holes	6
Motherboard chipset family	AMD
Windows operating systems supported	Windows 10, Windows 7
Non-ECC	Yes
Memory channels	Dual-channel
Memory slots type	DIMM
Number of memory slots	2
Supported memory types	DDR4-SDRAM
Maximum internal memory	32 GB
Supported memory clock speeds	1866, 2133, 2400, 2667, 2800, 2933, 3000, 3066, 3200, 3466 MHz
Processor socket	Socket AM4
Compatible processor series	AMD Athlon, AMD Ryzen 3, AMD Ryzen 3 2nd Gen, AMD Ryzen 3 3rd Gen, AMD Ryzen 5, AMD Ryzen 5 2nd Gen, AMD Ryzen 5 3rd Gen, AMD Ryzen 7, AMD Ryzen 7 2nd Gen, AMD Ryzen 7 3rd Gen, AMD Ryzen 9 3rd Gen
Maximum number of SMP processors	1
Maximum graphics card memory	2048 MB
Number of SATA II connectors	0
Number of SATA III connectors	4
HDMI version	1.4
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.
LAN controller	Realtek RTL8111H
Ethernet interface type	Gigabit Ethernet
Cables included	SATA
BIOS type	UEFI

Weight and Dimensions

Depth	210 mm
Width	244 mm