MSI PRO B860M-A WiFi
- Chipset:
- B860
- Socket:
- LGA1851
- Form Factor:
- Micro-ATX
- M.2 Slots:
- 3x M.2
- Network:
- WiFi 7 + 5G LAN
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Manufacturer: MSI Last updated: September 11, 2026
MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7) Review
The PRO B860M-A WiFi is the micro-ATX sibling of the PRO B860-P WiFi, giving compact-case Intel Core Ultra Series 2 builders the same PCIe 5.0 GPU slot and 5Gbps LAN in a smaller footprint.
MSI does not publish an exact VRM phase count for this board; it shares the same general power delivery tier as its ATX sibling and is rated for Core Ultra 5 and Core Ultra 7 chips at stock clocks. Four DDR5 UDIMM slots support up to 256GB total capacity, with single-channel single-rank overclocking rated up to 8800+ MT/s. Expansion includes four PCI-E x16 slots: a PCIe 5.0 x16 from the CPU and three PCIe 4.0 slots from the chipset (x1, x1, x4). Storage covers three M.2 slots: one PCIe 5.0 x4 from the CPU and two PCIe 4.0 slots from the chipset. A Realtek 8126 controller provides 5Gbps LAN, paired with Intel Wi-Fi 7 and Bluetooth 5.4. Audio uses a Realtek ALC897 codec with 7.1-channel support. Against its ATX sibling MSI PRO B860-P WiFi in this batch, the PRO B860M-A WiFi trims the board to a micro-ATX footprint while keeping an identical M.2 and networking configuration, making it the pick for compact cases.
Power Delivery and VRM Design
MSI does not publish an exact VRM phase count for this board; it shares the same general power delivery tier as its ATX sibling and is rated for Core Ultra 5 and Core Ultra 7 chips at stock clocks.
Memory Support
Four DDR5 UDIMM slots support up to 256GB total capacity, with single-channel single-rank overclocking rated up to 8800+ MT/s.
Expansion and Storage
Expansion includes four PCI-E x16 slots: a PCIe 5.0 x16 from the CPU and three PCIe 4.0 slots from the chipset (x1, x1, x4). Storage covers three M.2 slots: one PCIe 5.0 x4 from the CPU and two PCIe 4.0 slots from the chipset.
Connectivity
A Realtek 8126 controller provides 5Gbps LAN, paired with Intel Wi-Fi 7 and Bluetooth 5.4. Audio uses a Realtek ALC897 codec with 7.1-channel support.
Comparison to Sibling Products
Against its ATX sibling MSI PRO B860-P WiFi in this batch, the PRO B860M-A WiFi trims the board to a micro-ATX footprint while keeping an identical M.2 and networking configuration, making it the pick for compact cases.
Specifications
Platform and CPU compatibility
| Platform | Intel |
|---|---|
| Socket | LGA1851 |
| Socket | Intel Core Ultra Processors (Series 2) |
| Chipset | B860 |
Platform
| Socket Type | LGA1851 |
|---|---|
| Form Factor | Micro-ATX |
Memory
| Memory Type | DDR5 |
|---|---|
| Memory Slots | 4 |
| Max Memory | 256 GB |
| Memory Type | 4x DDR5 UDIMM, up to 256GB, up to 8800+ MT/s (OC) |
Expansion & Connectivity
| M.2 Slots | 3 |
|---|---|
| PCIe 5.0 Support | Yes |
| Wi-Fi Onboard | Yes |
Network and audio
| Audio Codec | Realtek ALC897, 7.1-channel |
|---|
| Model | PRO B860M-A WiFi |
|---|---|
| VRM | Digital VRM (phase count not officially disclosed by MSI) |
| Expansion | PCIe 5.0 x16 + 3x PCIe 4.0 |
| Connectivity | USB-C |
| Networking | Realtek 8126 5Gbps LAN, Wi-Fi 7, Bluetooth 5.4 |
| Special Features | 3x M.2 (1x Gen5, 2x Gen4) |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Compact micro-ATX Intel builds that want 5Gbps LAN
- Budget builders who don't need a full ATX layout
Not for
- Builds that want more than three M.2 slots
- Enthusiasts who want a stronger VRM than entry PRO-series boards
FAQs
What are the key specifications of the MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7)?
The MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7) is a motherboard from MSI. Key specs: Socket LGA1851, Chipset B860, VRM Digital VRM (phase count not officially disclosed by MSI), Memory 4x DDR5 UDIMM, up to 256GB, up to 8800+ MT/s (OC), Expansion PCIe 5.0 x16 + 3x PCIe 4.0.
Will the MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7) work with my current setup?
The MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7) lists Socket is LGA1851. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7) best suited to?
It suits compact micro-atx intel builds that want 5gbps lan, budget builders who don't need a full atx layout.
What are the drawbacks of the MSI PRO B860M-A WiFi (LGA1851/Intel B860/mATX/Three M.2 Slots/5Gbps LAN/Wi-Fi 7)?
It is a poor fit for builds that want more than three m.2 slots, enthusiasts who want a stronger vrm than entry pro-series boards.
Compare and read more
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