Build a reliable AM4 gaming PC with this MSI B550 ATX motherboard, supporting AMD Ryzen 3000, 4000G, and 5000 series processors with no TDP limitation. It offers up to 128GB DDR4 memory across four DIMM slots for smooth multitasking and gaming performance. Expansion is flexible with 2x PCIe 3.0 x16 slots and 2x PCIe x1 slots, plus fast storage support via 2x M.2 slots and 6x SATA 6Gb/s ports. Rear I/O includes HDMI and DisplayPort (for APUs), USB-C, multiple USB ports, and optical S/PDIF. Networking is handled by Realtek 1GbE LAN, while 7.1-channel audio with the ALC892 codec delivers immersive sound. Plenty of cooling headers—6 case fan, CPU fan, and pump—help keep your system running cool. Supports AMD 2-Way CrossFireX.
MSI B550 Gaming WiFi (B550,AM4,ATX,DDR4)
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Basic motherboard characteristics |
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| Chipset manufacturer | AMD |
| Manufacturer | MSI |
| Chipset | AMD B550 |
| Form factor | ATX |
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Motherboard processor |
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| Processor family | AMD |
| processor socket | Socket AM4 |
| Supported processors |
Ryzen 5000, Ryzen 4000G, Ryzen 3000, without TDP limitation |
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Motherboard memory |
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| Number of DIMM slots | 4x |
| Maximum main memory | 128 GB |
| Storage type | DDR4 |
| Non-ECC, Un-buffered | Yes |
| supported memory clock | 1866 |
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Motherboard expansion slots |
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| PCI-Express x16 (total) | 2x |
| PCI-Express 3.0 x16 | 2x |
| PCI-Express x1 | 2x |
| M.2 | 2x |
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Motherboard External Connectors |
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| DisplayPort | 1x |
| HDMI | 1x |
| USB 3.2 Type-C | 1x |
| USB 2.0 | 4x |
| PS/2 | 1 x |
| Ethernet (LAN) | 1 x |
| 3.5mm jack | 5x |
| Toslink/S/PDIF (optical) | Yes |
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Internal motherboard connectors |
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| SATA 6 GB/s | 6x |
| USB 3.2 Header | 2x |
| USB 2.0 Header | 2 x |
| TPM header | Yes |
| RAID | 36535 |
| Audio channels | 7.1 |
| Audio codec | ALC892 |
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Motherboard cooling |
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| CPU fan 4-pin | 1x |
| 4-pin case fan | 6x |
| 4-pin pump | 1x |
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Motherboard network |
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| LAN Controller |
Realtek® RTL8111H 1Gbps LAN |
| Transfer rate |
10/100/1000 Mb/s |
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Motherboard features |
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| Multi-GPU |
AMD 2-Way CrossFireX |
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