Catalog   /   Computing   /   Components   /   Motherboards   /   MSI

MSI PRO B840M-B

Photos - Motherboard MSI PRO B840M-B
Photos 5
MSI PRO B840M-B
Towards:home / office
Form Factor:micro-ATX
Socket:AM5
Chipset:AMD B840
BIOS:Ami
RAM slots:DDR5 2 sl
RAM form factor:DIMM
RAM clock:8000 MHz
Sound (channels):7.1
Connectors:HDMI, M.2
Power connector:24-pin
Processor power:8-pin
All specifications
Specifications PRO B840M-B
Main
Featuresfor home/office
SocketAM5
Form factormicro-ATX
Power phases10 / 7+2+1 /
Size (HxW)244x226 mm
Chipset
ChipsetAMD B840
BIOSAmi
UEFI BIOS
RAM
DDR52 slot(s)
Memory moduleDIMM
Operation mode2 channel
Max. clock frequency8000 MHz
Max. memory128 GB
EXPO support
Drive interface
SATA 3 (6Gbps)4
M.2 connector2
M.22xPCIe 4x
M.2 version2x4.0
Integrated RAID controller
Expansion slots
1x PCIe slots1 pcs
PCIe 16x slots1 pcs
PCIe support4.0
Steel PCIe connectors
Internal connections
TPM connector
USB-A 2.02 pcs
USB-A 5Gbps1 pcs
USB-C 5Gbps1 pcs
ARGB LED strip3
RGB LED strip1
Video outputs
D-Sub output (VGA)
HDMI output
HDMI versionv2.1
Integrated audio
AudiochipRealtek ALC897
Sound (channels)7.1
Network interfaces
LAN (RJ-45)2.5 Gbps
LAN ports1
LAN controllerRealtek 8125D
External connections
USB-A 2.02 pcs
USB-A 5Gbps4 pcs
BIOS FlashBack
Clear CMOS
Power connectors
Main power socket24-pin
CPU power8-pin
Fan power connectors3
CPU Fan 4-pin1
Chassis/Water Pump Fan 4-pin2
Official Websitemsi.com
Added to E-CatalogJune 2025
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog MSI 2026 - new arrivals, bestsellers, and the most relevant models MSI.
How to choose a motherboard?Motherboard is the main part of any computer. Here's how to choose the right one for work, play and entertainment

Buy MSI PRO B840M-B

All prices 10 →
When you make a purchase through links on our site, we may receive a affiliate commission.

MSI PRO B840M-B micro ATX AMD Socket AM5 Motherboard

BUSINESS ELEGANCE The PRO Series is tailored to professionals from all walks of life. The lineup features impressive perfor... moremance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency. MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI. Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before. DIRECT 7+2+1 POWER DESIGN Unleash and sustain the maximum performance with a VRM design built with a total of 7+2+1 digital power phases. With an 8-pin power connector, PRO B840M-B is ready for the challenge of heavy-loading tasks. Chipset Heatsink The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation. HIGH-BANDWIDTH AND LOW-LATENCY NETWORK MSIs premium network solution provides incredible data transfer speed for demanding users.
Box.co.uk
Delivery: to United Kingdom
Report
£79.99

MSI MSI Pro B840M-B (AMD AM5) B840 Micro-ATX Motherboard

ChipsetAMD B840 CPUSupports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors SocketAM5 Memory 2x DDR5... moreUDIMM, Maximum Memory Capacity 128GB DDR5 8000 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s Ryzen™ 9000 Series max. overclocking frequency: • 1DPC 1R Max speed up to 8000+ MT/s • 1DPC 2R Max speed up to 7200+ MT/s Supports AMD POR Speed and JEDEC Speed Supports Memory Overclocking and AMD EXPOTM Supports Dual-Channel mode Supports Non-ECC, Un-buffered memory Supports CUDIMM, Clock Driver bypass mode only* * Compatibility may vary by CPU series, BIOS updates improve support. DIMM slots have single-sided latches. Onboard Graphics 1x HDMI™ (HDMI 2.1, max 4K 60Hz)* 1x VGA (max resolution 2048x1536 50Hz) * Available only with CPUs with integrated graphics. Slots 1x PCI-E x16 (PCIe 4.0, from CPU) 1x PCI-E x1 (PCIe 3.0, from chipset) PCI_E1 slot supports: - PCIe 4.0 x16 (Ryzen 9000/7000) - PCIe 4.0 x8 (Ryzen 8700/8600/8400) - PCIe 4.0 x4 (Ryzen 8500/8300) AudioRealtek® ALC897 7.1-Channel High Definition Audio Storage 2x M.2 (PCIe 4.0 x4, supports 2280/2260 devices) 4x SATA 6G M2_2 slot supports up to PCIe 4.0 x4 (x2 for Ryzen 8500/8300) RAIDSupports RAID 0, 1, 10 for SATA; RAID 0, 1 for M.2 NVMe USB Rear: 2x USB 2.0, 4x USB 5Gbps Type A Front: 4x USB 2.0, 2x USB 5Gbps Type A, 1x USB 5Gbps Type C LANRealtek® 8125D 2.5G LAN Internal IO 1x ATX Power Connector 1x CPU Power Connector 1x CPU Fan 2x System Fan 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 1x Com Port (JCOM) 3x Addressable V2 RGB LED (JARGB_V2) 1x RGB LED (JRGB) 1x TPM header (TPM 2.0) Additional USB headers as listed LED Features4x EZ Debug LED, 1x EZ Memory Detection LED Back Panel Ports Clear CMOS Button HDMI™ VGA USB 5Gbps Type-A 2.5G LAN Audio Connectors Flash BIOS Button USB 2.0 Operating SystemSupports Windows® 11 64-bit Form FactormATX, 226mm x 243.84mm
Overclockers.co.uk
Delivery: to United Kingdom
Report
£79.99

MSI PRO B840M-B AM5 DDR5 PCIe 4.0 microATX Motherboard

Scan.co.uk
Delivery: to United Kingdom
Report
£79.99

Msi 911-7E76-002

BUSINESS ELEGANCE.The PRO Series is tailored to professionals from all walks of life.The lineup features impressive performan... morece and high quality, while aiming to provide users incredible experience.Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI.Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before.DIRECT 7+2+1 POWER DESIGN.Unleash and sustain the maximum performance with a VRM design built with a total of 7+2+1 digital power phases.With an 8-pin power connector, PRO B840M-B is ready for the challenge of heavy-loading tasks.Chipset Heatsink.The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.HIGH-BANDWIDTH AND LOW-LATENCY NETWORK.MSI´s premium network solution provides incredible data transfer speed for demanding users..MSI PRO B840M-B.Processor manufacturer:AMD, Processor socket:Socket AM5, Compatible processor series:AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series.Supported memory types:DDR5-SDRAM, Maximum internal memory:128 GB, Memory slots type:DIMM.Supported storage drive interfaces:M.2, Micro SATA III, Supported storage drive types:HDD & SSD, RAID levels:0, 1, 10.Ethernet interface type:2.5 Gigabit Ethernet, LAN controller:Realtek RTL8125D.Component for:PC, Motherboard form factor:micro ATX, Motherboard chipset family:AMD.Supports AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors.Supports DDR5 Memory, Dual Channel DDR5 8000+ MT/s (OC).Ultra Performance:Direct 7+2+1 Power System with P-PAK, 8-pin CPU power connector, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper.EZ DIY:EZ M.2 Clip II and EZ PCIe Clip II.Lightning Fast Game experience:PCIe 4.0 slot and Lightning Gen 4 x4 M.2.2.5G LAN:the remarkable solution for professional and multimedia use, delivering secure, stable, and high-speed networking and data transmission.Audio Boost:Reward your ears with studio grade sound quality for the most immersive gaming experience.
Tradeinn.com
Delivery: in United Kingdom
Report
£85.99

MSI PRO B840M-B AM5 DDR5 MATX Motherboard MSI PRO B840M-B AM5 DDR5 MATX Motherboard

The MSI PRO B840M-B AM5 DDR5 MATX motherboard delivers exceptional performance for gamers and creators alike. With support fo... morer latest AMD Ryzen processors and DDR5 memory, it ensures rapid data transfer and enhanced stability. Featuring multiple PCIe slots, USB 3.2 connectivity, and advanced thermal solutions, this board guarantees a seamless computing experience.
Awd-it.co.uk
Delivery: to United Kingdom
Report
£89.99
5 more offer(s)