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MSI
PRO B840M-B motherboard AMD B840 Socket AM5 micro ATX
MotherboardsAt a glance
Full specification ↓- Chipset
- AMD B840
- CPU socket
- Socket AM5
- Form factor
- micro ATX
- Supported memory types
- DDR5-SDRAM
- Max memory
- 128 GB
- M.2 slots
- 2
£98.76inc. VAT
£82.30 ex VAT
In stockDispatched from UK distributor stock
1
- UK delivery direct from distributor stock. Delivery details
- 14-day returns under your statutory cancellation rights. Returns policy
- Secure checkout powered by Stripe.
About this product
MSI PRO B840M-B, AMD, Socket AM5, AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series, Socket AM5, DDR5-SDRAM, 128 GB
BUSINESS ELEGANCE
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance 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.
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance 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.
Key features
- 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
Full specification
60 specifications
- System Management BIOS (SMBIOS) version
- 3.7
- ACPI version
- 6.5
- BIOS memory size
- 256 Mbit
- BIOS type
- UEFI AMI
- 2nd M.2 highest PCI Express generation
- 4.0
- 2nd M.2 largest key size
- 2280
- 1st M.2 highest PCI Express generation
- 4.0
- 1st M.2 largest key size
- 2280
- Number of M.2 (M) slots
- 2
- PCI Express x16 (Gen 4.x) slots
- 1
- PCI Express x16 slots
- 2
- Windows operating systems supported
- Windows 11 x64
- Motherboard chipset family
- AMD
- Motherboard form factor
- micro ATX
- Component for
- PC
- Product colour
- Black
- Audio output channels
- 7.1 channels
- Audio chip
- Realtek ALC897
- Motherboard chipset
- AMD B840
- On-board graphics card
- No
- Number of RGB LED pin headers
- 3
- RGB LED pin header
- Yes
- Number of water pump connectors
- 1
- Number of chassis fan connectors
- 5
- Number of CPU fan connectors
- 1
- Total number of SATA connectors
- 4
- Number of SATA III connectors
- 4
- USB 3.2 Gen 2 (3.1 Gen 2) connectors
- 1
- USB 3.2 Gen 1 (3.1 Gen 1) connectors
- 2
- USB 2.0 connectors
- 4
- Maximum internal memory
- 128 GB
- Supported memory clock speed (max)
- 8000 MHz
- Supported memory clock speeds
- 4800,5600,8000 MHz
- ECC сompatibility
- Non-ECC
- Memory channels
- Dual-channel
- Memory slots type
- DIMM
- Number of memory slots
- 2
- Supported memory types
- DDR5-SDRAM
- Top Wi-Fi standard
- Not available
- Wi-Fi
- No
- LAN controller
- Realtek RTL8125D
- Ethernet interface type
- 2.5 Gigabit Ethernet
- Ethernet LAN
- Yes
- Supported processor sockets
- Socket AM5
- Compatible processor series
- AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
- Processor socket
- Socket AM5
- Processor manufacturer
- AMD
- HDMI version
- 2.1
- HDMI ports quantity
- 1
- Ethernet LAN (RJ-45) ports
- 1
- USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
- 4
- USB 2.0 ports quantity
- 2
- RAID levels
- 0, 1, 10
- RAID support
- Yes
- Number of HDDs supported
- 4
- Number of storage drives supported
- 6
- Supported storage drive interfaces
- M.2, Micro SATA III
- Supported storage drive types
- HDD & SSD
- Depth
- 243.8 mm
- Width
- 226 mm
Downloads
Delivery & returns
- Delivery
- UK delivery direct from distributor stock. Delivery details
- Returns
- 14 days to change your mind under your statutory cancellation rights. Returns policy
- Warranty
- Warranty terms — contact support with the part code.
- Payment
- Secure checkout powered by Stripe.
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