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Overview

Range/Series Overview


IMPORTANT: This Range/Series overview section describes the range of which this product belongs. Features of different versions might be mentioned and may not apply to the specific product on this page. Please view Specs for specification of product.

The MSI PRO B840M-B is designed to meet the demands of performance-driven users, featuring a robust AMD B840 chipset and compatibility with Ryzen processors from the 7000 to 9000 series. This micro ATX motherboard supports DDR5 SDRAM with speeds ranging from 4800 MT/s to 8000 MT/s when overclocked, ensuring users can maximize their system's memory capabilities. The motherboard includes dual-channel memory architecture and a well-structured layout, allowing for efficient multitasking and responsiveness during various computing tasks. With a variety of connectivity options, the PRO B840M-B offers multiple USB ports, including USB 2.0 and USB 3.2 Gen 1, as well as audio options powered by the Realtek ALC897 codec, providing high definition audio output. The integrated 2.5 Gigabit Ethernet ensures rapid networking capabilities, enhancing online activities and gaming experiences. Other notable features include ESD protection, MSI Audio Boost, and MSI Mystic Light for customizable aesthetics, making this motherboard functional and visually appealing.


Specification Summary

Product Description
MSI PRO B840M-B - motherboard - micro ATX - Socket AM5 - AMD B840
Product Type
Motherboard - micro ATX
Chipset Type
AMD B840
Processor Socket
1 x Socket AM5
Compatible Processors
Ryzen (supports Ryzen 7000/8000/9000 Series)
Max RAM Size
128 GB
RAM Supported
2 DIMM slots - DDR5, non-ECC, on-die ECC, unbuffered
Storage Ports
4 x SATA-600 (RAID), 2 x M.2
USB / FireWire Ports
4 x USB 3.2 Gen 1 + 2 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 via headers)
Audio
HD Audio (8-channel)
LAN
2.5 Gigabit Ethernet

Specifications

EAN / GTIN:
4711377360166
General
Product Type
Motherboard - micro ATX
Chipset Type
AMD B840
Processor Socket
Socket AM5
Max Processors Qty
1
Compatible Processors
Ryzen (supports Ryzen 7000/8000/9000 Series)
Supported RAM
Max Size
128 GB
Technology
DDR5
Bus Clock
4800 MT/s, 5600 MT/s, 5600 MT/s (O.C.), 7200 MT/s (O.C.), 8000 MT/s (O.C.)
Supported RAM Integrity Check
Non-ECC, on-die ECC
Registered or Buffered
Unbuffered
Features
AMD EXPO technology, dual channel memory architecture
Audio
Type
HD Audio (8-channel)
Audio Codec
Realtek ALC897
Compliant Standards
High Definition Audio
LAN
Network Controller
Realtek RTL8125D
Network Interfaces
2.5 Gigabit Ethernet
Expansion / Connectivity
Expansion Slots
1 x CPU ¦ 2 x DIMM 288-pin ¦ 1 x PCIe 4.0 x16 ¦ 1 x PCIe 3.0 x1 ¦ 2 x M.2 socket (2260/2280 M.2 Key M slot)
Storage Interfaces
SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 ¦ PCIe 4.0 -connectors: 2 x M.2 - RAID 0 / RAID 1
Interfaces
1 x HDMI ¦ 1 x VGA ¦ 1 x LAN (2.5Gigabit Ethernet) ¦ 2 x USB 2.0 ¦ 4 x USB 3.2 Gen 1 ¦ 1 x microphone - mini-jack ¦ 1 x audio line-in - mini-jack ¦ 1 x audio line-out - mini-jack
Internal Interfaces
1 x USB-C 3.2 Gen 1 - header ¦ 2 x USB 3.2 Gen 1 - header ¦ 4 x USB 2.0 - header ¦ 1 x audio - header ¦ 1 x serial - header ¦ 1 x SPI - header
Power Connectors
24-pin main power connector, 8-pin ATX12V connector
Features
BIOS Type
AMI
BIOS Features
MSI ClickBIOS
Hardware Features
7+2+1 Phase Power Design, Frozr AI Cooling, MSI AI Engine, MSI Companion, MSI LAN Manager, EZ PCie Clip II, EZ M.2 Clip II, EZ Debug LED, MSI Core Boost, MSI Audio Boost, MSI Memory Boost, ESD Protection, 6 Layer PCB, 2oz Copper PCB, Surface Mount Technology (SMT), transient voltage suppressors, MSI Stainless Steel Back I/O, pre-mounted I/O shield, CUDIMM support, chipset heatsink, MSI Mystic Light
Miscellaneous
Included Accessories
2 x EZ M.2 clip II, EZ M.2 clip II remover
Cables Included
1 x Serial ATA cable
Width
24.384 cm
Depth
22.6 cm

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