MSI PRO B840M-B Motherboard, AMD B840, Socket AM5, micro ATX

Processor socketSocket AM5
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Motherboard chipsetAMD B840
Supported memory typesDDR5-SDRAM
Number of memory slots2
Motherboard form factorMicro ATX
All features

Product Overview

Enhance your computing experience with the MSI PRO B840M-B Motherboard. Designed for AMD’s latest technology, this micro ATX motherboard is the perfect foundation for your next build, ensuring seamless performance for both casual and professional users.

Key Features

Chipset: AMD B840 for exceptional performance and stability.
Socket: AM5, compatible with the newest AMD processors.
Form Factor: Micro ATX design, fitting into a variety of PC cases.
Durability: High-quality components designed for longevity and reliability.
Connectivity: Multiple ports for USB, audio, and networking to meet all your connectivity needs.

Performance and Compatibility

The MSI PRO B840M-B is built to support the latest generation of AMD processors, allowing you to unlock their full potential. With efficient power delivery and robust thermal solutions, this motherboard keeps your system running smoothly even under heavy loads.

Easy Installation

The micro ATX size ensures compatibility with a vast array of cases, while the intuitive layout simplifies installation and cable management, making your build process easier and quicker.

Why Choose MSI?

MSI is known for performance and innovation, offering products that cater to gamers, creators, and everyday users alike. The MSI PRO B840M-B stands out with its reliable quality and the powerful features needed for an exceptional computing experience.

Specifications

Product Code: 4711377360166
Form Factor: Micro ATX
Supported Processors: AMD AM5
Chipset: AMD B840
Memory Slots: Multiple slots for increased RAM capacity.

Upgrade Your Build Today!

Don't settle for less. Choose the MSI PRO B840M-B Motherboard and set the stage for an incredible computing experience. Whether you’re gaming, streaming, or creating, this motherboard has everything you need for high performance.

Main

Brand

MSI

Warranty

1 year warranty

Product code

4711377360166

EAN/UPC code

4711377360166

BIOS

ACPI version

6.5

BIOS memory size

256 Mbit

BIOS type

UEFI AMI

System management BIOS (SMBIOS) version

3.7

Expansion slots

1st M.2 highest PCI Express generation

4.0

1st M.2 largest key size

2280

2nd M.2 highest PCI Express generation

4.0

2nd M.2 largest key size

2280

Number of M.2 (M) slots

2

PCI Express x16 slots

2

Features

Audio chip

Realtek ALC897

Audio output channels

7.1 channels

Component for

PC

Motherboard chipset

AMD B840

Motherboard chipset family

AMD

Motherboard form factor

Micro ATX

Product colour

Black

Windows operating systems supported

Windows 11 x64

Internal I/O

Number of chassis fan connectors

5

Number of CPU fan connectors

1

Number of RGB LED pin headers

3

Number of SATA III connectors

4

Number of water pump connectors

1

RGB LED pin header

Yes

Total number of SATA connectors

4

USB 2.0 connectors

4

USB 3.2 Gen 1 (3.1 Gen 1) connectors

2

USB 3.2 Gen 2 (3.1 Gen 2) connectors

1

Memory

ECC сompatibility

Non-ECC

Maximum internal memory

128 GB

Memory channels

Dual-channel

Memory slots type

DIMM

Number of memory slots

2

Supported memory clock speed (max)

8000 MHz

Supported memory clock speeds

4800,5600,8000 MHz

Supported memory types

DDR5-SDRAM

Network

Ethernet interface type

2.5 Gigabit Ethernet

Ethernet LAN

Yes

LAN controller

Realtek RTL8125D

Processor

Processor manufacturer

AMD

Processor socket

Socket AM5

Supported processor sockets

Socket AM5

Compatible processor series

AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series

Rear panel I/O ports

Ethernet LAN (RJ-45) ports

1

HDMI ports quantity

1

HDMI version

2.1

USB 2.0 ports quantity

2

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity

4

Storage controllers

Number of HDDs supported

4

Number of storage drives supported

6

RAID levels

0, 1, 10

RAID support

Yes

Supported storage drive interfaces

M.2, Micro SATA III

Supported storage drive types

HDD & SSD

Weight & dimensions

Depth

243.8 mm

Width

226 mm

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4

Reviews: 5

5 stars

0%

4 stars

100%

3 stars

0%

2 stars

0%

1 star

0%

רותם רוזנברג

17/02/2026

4

אני מאוד מרוצה מה-MSI PRO B840M-B. הוא מתפקד בצורה מופתית עם תהליכי עיבוד מרובים, בהחלט שווה את המחיר. חסרון אחד הוא שהמדריך לא היה כל כך ברור, אבל זה לא מונע מלהמליץ עליו.

Advantages

תפקוד מצוין בתהליכי עיבוד מרובים

Disadvantages

מדריך לא ברור

Иван Петров

05/03/2025

4

Материнская плата MSI PRO B840M-B отлично справляется с задачами в играх и повседневной работе. Я был приятно удивлён качеством сборки и поддержкой процессоров AMD нового поколения. Однако, несмотря на все преимущества, я столкнулся с некоторыми проблемами совместимости с определёнными видеокартами.

Advantages

Качество сборки, поддержка новых процессоров AMD

Disadvantages

Проблемы совместимости с видеокартами

Amit Levi

15/01/2024

4

The MSI PRO B840M-B is a solid choice for anyone looking to build a reliable PC. The thermal management is impressive, which allows for stable performance during long gaming sessions. However, I wish there were more RGB customization options, as I am a fan of visually appealing setups.

Advantages

Excellent thermal management, stable performance

Disadvantages

Limited RGB customization

Shay Ben-Eliyahu

29/10/2023

4

For a micro ATX board, the MSI PRO B840M-B packs quite a punch. I've been using it for a workstation, and it handles multitasking very well. The BIOS interface is user-friendly as well. The only downside is that it doesn't have Wi-Fi built-in, which can be inconvenient for some users.

Advantages

Great for multitasking, user-friendly BIOS

Disadvantages

No built-in Wi-Fi

דוד כהן

10/07/2023

4

הקדשתי זמן לחקור את ה-MSI PRO B840M-B ואני חייב לומר שזה היה אחד המשפטים הטובים שעשיתי. הוא מציע ביצועים גבוהים מאוד, והתקנה שלו הייתה פשוטה. כרטיס המסך שלי רץ חלק וכך גם כל הבדיקות. עם זאת, חסרונות קטנים כמו שטח מוגבל לחיבורי USB נוספים יכולים להוות אתגר.

Advantages

ביצועים גבוהים, התקנה פשוטה

Disadvantages

שטח מוגבל לחיבורי USB

MSI PRO B840M-B - Motherboard, AMD B840, Socket AM5, micro ATX