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MSI PRO B550M-P AMD AM4 Micro-ATX Motherboard, B550 Chipset, DDR4 4400+ MHz, Dual M.2, PCIe 4.0, USB 5Gbps Type-C, Realtek 1GbE LAN, HDMI/DP/VGA
OPEN BOX Product Type
- AM4 Platform & B550 Chipset: Supports AMD Ryzen 5000 / 5000 G-Series / 4000 G-Series / 3000 / 3000 G-Series desktop processors on Socket AM4 for a versatile, upgrade-ready build
- High-Speed DDR4 Memory: 4x DDR4 DIMM slots, up to 128GB, dual-channel, with A-XMP overclocking support to 4400+ MHz for responsive multitasking and gaming
- Dual M.2 & PCIe 4.0: PCIe 4.0 x16 graphics slot plus two M.2 sockets (PCIe 4.0 x4 from CPU / PCIe 3.0 x4 from chipset) and 4x SATA 6G with RAID 0/1/10 support for fast, flexible storage
- Modern USB & Connectivity: Front USB 5Gbps Type-C plus multiple USB 5Gbps Type-A ports, Realtek RTL8111H 1Gbps LAN, and Realtek ALC897 7.1-channel HD audio
- Integrated Display & RGB: Triple display output (HDMI 2.1, DisplayPort 1.4, VGA) for Ryzen APUs, with JARGB_V2 and JRGB headers, 4x EZ Debug LED, and TPM 2.0 header in a compact mATX form factor
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Specs
Learn more about the Detailed Specifications
| Brand | MSI |
|---|---|
| Series | PRO |
| CPU Socket Type | AM4 |
|---|---|
| CPU Type | Ryzen 5000 Series, Ryzen 5000 G-Series, Ryzen 4000 G-Series, Ryzen 3000 Series, Ryzen 3000 G-Series |
| Chipset | AMD B550 |
|---|---|
| South Bridge | AMD B550 |
| Number of Memory Slots | 4x288pin (DDR4) |
|---|---|
| Memory Standard | DDR4 4400 |
| Maximum Memory Supported | 128GB |
| Channel Supported | Dual Channel |
| Memory Performance Profile | Intel XMP |
| ECC Supported | Non-ECC |
| Buffer Supported | Un-buffered |
| PCI Express 4.0 x16 | 1 x PCI Express 4.0 x16 |
|---|---|
| PCI Express 3.0 x16 | 0 x PCI Express 3.0 x16 |
| PCI Express 2.0 x16 | 0 x PCI Express 2.0 x16 |
| PCI Express x16 | 1 x PCI Express x16 |
| PCI Express x1 | 2 x PCI Express x1 |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
|---|---|
| M.2 | M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices M.2_2 Source (From Chipset) supports up to PCIe 3.0 x4 , supports 2280/2260/2242 devices |
| SATA RAID | 0/1/10 |
| Audio Chipset | Realtek ALC897 |
|---|---|
| Audio Channels | 7.1 Channels |
| LAN Chipset | Realtek RTL8111H |
|---|---|
| Max LAN Speed | 1Gbps |
| Bluetooth | No |
| COM | 1 |
|---|---|
| Video Ports | D-Sub + Display Port + HDMI |
| HDMI | 1 x HDMI |
| RJ45 | 1 x RJ45 |
| DisplayPort | 1 x DisplayPort |
| USB 3.1 | 7 x USB 3.1 |
| USB 3.0 | 7 x USB 3.0 |
| USB 1.1/2.0 | 6 x USB 2.0 |
| USB Type-C | 1 x USB 5Gbps Type C |
| Onboard USB | 2 x USB 3.2 + 4 x USB 2.0 + 1 x USB Type-C® header, with USB 3.2 Gen 1 |
|---|
| Form Factor | Micro ATX |
|---|---|
| LED Lighting | None RGB |
| Dimensions (W x L) | 243.84mm x 243.84mm |
| Windows 11 | Supported |
|---|
| First Listed on Newegg | October 23, 2026 |
|---|
Warranty & Returns
Warranty, Returns, And Additional Information
Return Policies
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Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-626-913-0828
- Support Website
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