MSI PRO B550M-P AM4 mATX Motherboard
- Processor Socket: Socket AM4
- Chipset Type: AMD B550
- Chipset Family: AMD B550
- RAM Memory Technology: DDR4
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A straightforward micro-ATX board for a compact Ryzen 5000 AM4 build where onboard Wi-Fi is not needed.
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ASIN: B0H2C1VYZ7Model: PRO B550M-PCategory: Motherboards
Overview
The MSI PRO B550M-P is a micro-ATX AM4 motherboard for Ryzen 5000, 5000G, 4000G, 3000 and 3000G series processors, built around the B550 chipset with DDR4 support.
It uses passive chipset cooling plus MSI's Frozr AI system, which adjusts fan speed automatically based on CPU and GPU temperature rather than a separate control app. The smaller mATX footprint trims connectivity versus the full ATX B550 boards in MSI's range, with a single Gigabit LAN port and no built in Wi-Fi.
- AM4 socket for Ryzen 5000 / 5000G / 4000G / 3000 series
- DDR4 memory overclocking up to 4400+ MT/s
- Dual M.2 slots, one Gen4 and one Gen3
- Frozr AI automatic fan control
Who it's for
Builders assembling a compact AM4 system with a Ryzen 5000 series or older chip who don't need onboard Wi-Fi or multiple expansion slots. Not the right fit for anyone wanting Wi-Fi built in or planning a build with more than one PCIe x16 card.
Pros and cons
- Supports wide Ryzen 5000/4000G/3000 series range on AM4
- DDR4 overclocking up to 4400+ MT/s
- Passive chipset cooling plus automatic Frozr AI fan control
- Compact mATX size for smaller builds
- No built-in Wi-Fi, wired Gigabit LAN only
- Second M.2 slot limited to Gen3 speeds
Performance notes
MSI's Core Boost VRM design targets stable power delivery for Ryzen 5000 series chips on the B550 chipset, with passive chipset heatsinks and the Frozr AI system automatically adjusting case fan speeds off CPU and GPU temperature readings. Four DDR4 slots support overclocking up to 4400+ MT/s, and the single PCIe 4.0 x16 slot with steel armor carries the graphics card. Storage covers an M.2 Gen4 x4 slot and a second M.2 Gen3 x4 slot, with a Gigabit LAN port and 7.1 HD audio on the rear panel.
Specifications
| Brand | msi |
|---|---|
| Model | PRO B550M-P |
| Capacity & performance | |
| Memory Clock Speed | 4.4 GHz |
| Compatibility & installation | |
| Graphics Card Interface | PCI Express |
| Compatible Devices | Personal Computer |
| Other details | |
| Processor Socket | Socket AM4 |
| Chipset Type | AMD B550 |
| Chipset Family | AMD B550 |
| RAM Memory Technology | DDR4 |
| Memory Slots Available | 4 |
| Total PCIe Ports | 1 |
| Number of Ethernet Ports | 1 |
| Platform | Windows 11 |
| Number of Items | 1 |
| Mfr Part Number | PRO B550M P |
Frequently asked questions
What processors does the MSI PRO B550M-P support?
Ryzen 5000, 5000 G-Series, 4000 G-Series, 3000 and 3000 G-Series processors on the AM4 socket.
Does the PRO B550M-P have Wi-Fi built in?
No, it uses a Gigabit LAN port for wired networking with no onboard Wi-Fi module.
What is the form factor of the PRO B550M-P?
It is a micro-ATX board, smaller than MSI's full ATX B550 boards.