MSI PRO B840M-B

AM5, AMD B840, mATX
1Ratings
BrandMore from MSI
Delivered between Wed, 8.4. and Fri, 10.4.
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Product details

Business elegance
The PRO series is tailored to professionals from all walks of life. The range offers impressive performance and high quality while aiming to provide users with an incredible experience. Users who value productivity and efficiency can definitely rely on the MSI PRO series to assist in multitasking and increasing efficiency.

MSI motherboards are equipped with advanced hardware and technology that optimally support the demanding computing requirements of gaming and AI.

Direct 7+2+1 power design
Unleash and maintain maximum performance with a VRM design consisting of a total of 7+2+1 digital power phases. With an 8-pin power connector, the PRO B840M-B is ready for the challenges of compute-intensive tasks.

Chipset heat sink
The chipset heatsink is designed to reduce dust and noise and is able to maintain high heat dissipation efficiency.

High bandwidth and low latency network
MSI's premium networking solution offers incredible data transfer speeds for demanding users.

Key specifications

Number of memory modules (RAM)
2x
Internal connection options
M.2 PCIe (2x), S-ATA III (4x)

General information

Item number
58523935
Manufacturer
MSI
Category
Motherboards
Manufacturer no.
7E76-002R
Release date
13.5.2025
External links
Manufacturer's site (it)

Motherboard properties

Form factor
Micro ATX (mATX)
Socket
AM5
Chipset
AMD B840
Operating system compatibility
Windows 11 Pro
BIOS type
UEFI AMI

Memory

Memory form factor
DIMM
Number of memory modules (RAM)
2x
Max. memory (RAM)
128 GB
Memory chip
DDR5-5200, DDR5-5600
Max. RAM OC
8000 MHz

Graphics properties

Video connections
HDMI (1x)
Video connection version
HDMI 2.1

Network

Network connections
RJ45 2.5 Gigabit Ethernet (1x)
Ethernet controller brand
Realtek
Ethernet controller
Realtek RTL8125
Max. port speed
2.50 Gbit/s

Audio

Chip
Realtek ALC897
Audio channel
7.1 Channel

Data storage

RAID configuration
0, 1, 10

Internal interfaces

Internal connection options
M.2 PCIe (2x), S-ATA III (4x)
Expansion slot
PCI Express x16 (2x)
PCI express version (max.)
4
Number of fan connector
5

Further connections

USB ports
USB-A
Exact USB ports
USB-A 2.0 (2x), USB-A 3.2 Gen 1 (4x)

Origin

Country of origin
China

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂ emissions
1479.42 kg
Climate contribution
CHF 4.54

Product dimensions

Length
243.80 mm
Width
226 mm
Weight
967 g

Package dimensions

Length
28.20 cm
Width
26.50 cm
Height
7.30 cm
Weight
965 g

30-day right of return
24 Months Warranty (Bring-in)
6 additional offers

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Motherboards» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 1.MSI
    2.4 %
  • 2.ASUS
    2.5 %
  • 3.Gigabyte
    2.6 %
  • 4.AsRock
    2.9 %
  • 5.Supermicro
    3.2 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 1.AsRock
    4 days
  • 2.MSI
    6 days
  • 3.ASUS
    8 days
  • 4.Gigabyte
    10 days

Return rate

How often is a product of this brand in the «Motherboards» category returned?

Source: Digitec Galaxus
  • 1.MSI
    4.8 %
  • 2.Gigabyte
    5 %
  • 3.ASUS
    5.1 %
  • 4.AsRock
    5.9 %
  • 5.Biostar
    7.7 %
Source: Digitec Galaxus