MSI PRO B840M-P WIFI6E AMD B840 Socket AM5 mATX Motherboard
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About This Item
- AMD B840 chipset with Socket AM5 support for Ryzen 7000/8000/9000 series processors
- Four DDR5 DIMM slots supporting up to 256 GB with speeds up to 8000 MHz
- Two M.2 slots (PCIe 4.0) plus four SATA III connectors for flexible storage options
- Micro ATX form factor with 7.1-channel Realtek ALC897 audio
- Wi-Fi 6E and 2.5G LAN with Bluetooth 5.3 for high-bandwidth networking
- Five chassis fan connectors, three RGB headers, and one water pump connector
- What to check: HDMI 2.1 support and rear USB port quantities
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MSI PRO B840M-P WIFI6E | AMD B840 micro ATX Motherboard
The MSI PRO B840M-P WIFI6E motherboard AMD B840 Socket AM5 micro ATX is built for professionals and system builders who need a stable, efficient foundation for modern AMD Ryzen processors. It offers a harmonious silver design, Wi-Fi 6E connectivity, and PCIe 4.0 support. This board is ideal for productivity-focused builds, home offices, and compact gaming systems.
Core Platform and Memory Support
This motherboard uses the AMD B840 chipset and supports Socket AM5 processors. It is compatible with AMD Ryzen 7000, 8000, and 9000 series CPUs. You get four DIMM slots for DDR5 memory. The board supports dual-channel operation and speeds up to 8000 MHz (OC). Maximum RAM capacity is 256 GB. ECC memory is not supported.
Connectivity and Networking
The board includes Wi-Fi 6E and Bluetooth 5.3 for wireless access. A 2.5 Gigabit Ethernet port (Realtek RTL8125D) handles wired connections. You also get one HDMI 2.1 port for integrated graphics output. However, the board does not have an on-board graphics card. Use a dedicated GPU for display output.
Storage and Expansion
You can install two M.2 drives (PCIe 4.0) and connect up to four SATA drives. The board supports RAID 0, 1, and 10 for data redundancy or performance. In practice, this allows flexible storage configurations for both SSDs and HDDs. Verify your case has enough space for a micro ATX board and drive bays.
Cooling and Power Delivery
The VRM uses a 7+2+1 digital power phase design with an 8-pin connector. This supports heavy workloads and sustained performance. The board features an extended heatsink, a chipset heatsink, and high-quality thermal pads. You get five chassis fan connectors, one CPU fan connector, and one water pump connector. This ensures effective cooling for demanding builds.
Audio and Internal Headers
The Realtek ALC897 audio chip provides 7.1-channel output. Internal headers include three RGB LED pin headers and one RGB LED pin header. The board also has USB 3.2 Gen 1 and Gen 2 connectors. However, front-panel USB headers are not specified. Confirm your case’s front-panel USB support matches the board’s headers.
Product Specifications
| Metric | Spec. |
|---|---|
| Chipset | AMD B840 |
| Socket | AM5 |
| Memory | 4x DDR5, up to 256 GB, 8000 MHz (OC) |
| M.2 Slots | 2x PCIe 4.0 |
| Networking | Wi-Fi 6E, 2.5GbE, Bluetooth 5.3 |
| Form Factor | micro ATX |
Package Contents
The following internal connectors and headers are specified:
- 2x M.2 slots
- 4x SATA III connectors
- 1x USB 3.2 Gen 2 connector
- 2x USB 3.2 Gen 1 connectors
- 4x USB 2.0 connectors
- 5x chassis fan connectors
- 1x CPU fan connector
- 1x water pump connector
- 3x RGB LED pin headers
- 1x HDMI 2.1 port
Key points to check
- Confirm your case supports micro ATX and has clearance for 243.8 mm x 243.8 mm.
- Verify your PSU has an 8-pin EPS connector for the CPU power.
- Check your Wi-Fi router supports 6 GHz band for Wi-Fi 6E.
- Ensure your operating system is Windows 11 x64 for full compatibility.
Common questions
Does this board support PCIe 5.0?
Is ECC memory supported?
Can I use AMD Ryzen 9000 series CPUs?
How many displays can I connect?
Does it include Wi-Fi antennas?
Our recommendation
This board is suited for professionals, home office users, and builders seeking a compact, reliable AMD platform with modern connectivity. It balances performance, efficiency, and expandability for productivity and light gaming. Covered by the applicable manufacturer warranty.
| Number of M.2 M slots | 2 |
|---|---|
| USB 3.2 Gen 2 3.1 Gen 2 connectors | 1 |
| Total number of SATA connectors | 4 |
| Supported storage drive interfaces | M.2, Micro SATA III |
| USB 2.0 connectors | 4 |
| USB 3.2 Gen 1 3.1 Gen 1 connectors | 2 |
| Number of SATA III connectors | 4 |
| Number of chassis fan connectors | 5 |
| RGB LED pin header | Yes |
| Number of CPU fan connectors | 1 |
| Number of water pump connectors | 1 |
| Number of RGB LED pin headers | 3 |
| Motherboard chipset family | AMD |
| Supported processor sockets | Socket AM5 |
| On-board graphics card | No |
| Component for | PC |
| Audio output channels | 7.1 channels |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Windows operating systems supported | Windows 11 x64 |
| RAID levels | 1, 10 |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | Socket AM5 |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Memory channels | Dual-channel |
| Supported memory clock speeds | 4800,5600,8000 MHz |
| Maximum internal memory | 256 GB |
| Supported memory clock speed max | 8000 MHz |
| ECC сompatibility | Non-ECC |
| Number of storage drives supported | 6 |
| RAID support | Yes |
| USB 3.2 Gen 1 3.1 Gen 1 Type-A ports quantity | 2 |
| USB 2.0 ports quantity | 4 |
| HDMI ports quantity | 1 |
| Ethernet LAN RJ-45 ports | 1 |
| Wi-Fi standards | 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 6E (802.11ax) |
| LAN controller | Realtek RTL8125D |
| Bluetooth version | 5.3 |
| Top Wi-Fi standard | Wi-Fi 6E (802.11ax) |
| Audio chip | Realtek ALC897 |
| Product colour | Black |
| PCI Express x16 slots | 2 |
| 1st M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 largest key size | 2280 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| ACPI version | 6.5 |
| System Management BIOS SMBIOS version | 3.7 |
| Width | 243.8 mm |
| Depth | 243.8 mm |
| Distributor SKUs | 127058, 4711377361804, 911-7E77-002 |
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