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MSI PRO B550M-B
Micro ATX Motherboard Socket AM4 AMD B550 - 2x DDR4 - SATA 6Gb/s + M.2 - USB 3.0 - PCI-Express 4.0 16x
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MSI PRO B550M-B: Gaming Motherboard PCI-Express 4.0
Featuring the AMD B550 chipset, the MSI PRO B550M-B motherboard with its AM4 socket is designed to support AMD Ryzen 3rd, 4th and 5th generation processors. It will let you build a Gaming configuration with the latest technological advances: PCI-Express 4.0 for graphics cards and M.2 SSDs, support for 64 GB of DDR4 RAM. Everything is here for an exhilarating gaming experience, now it's your turn to play!
The advantages of the MSI PRO B550M-B:
The MSI PRO series motherboards with a B550 chipset are designed to fit into any PC. They are also designed to deliver reliable performance and smart professional solutions that make your work easier. In short, MSI PRO motherboards are synonymous with stability, efficiency and longevity.
- AMD AM4 socket for AMD Ryzen 3000 / 3000G / 4000G / 5000 / 5000G processor
- 2 DDR4 4600+ MHz memory slots (OC) Dual-Channel
- 1 x M.2 PCIe 4.0 x4 / SATA 6 Gbit/s + 1 x M.2 PCIe 3.0 x4
- Perfect cooling thanks to thermal pads and M.2 Shield Frozr
- 1 PCI-Express 4.0 16x slot
- Mystic Light
- Audio Boost for high-quality sound
- EZ DIY: EZ Debug LED and EZ Mounting
Add color to your machine
Connect RGB LED strips to your PC and synchronize colors and effects with compatible peripherals using a single application: Mystic Light Sync. This application lets you instantly customize the look of your PC by choosing from a very wide color palette and several lighting effects. You can change the colors through the Mystic Light app installed on a smartphone or the Gaming App installed on the PC.
Select your criteria
General information |
Product name |
MSI PRO B550M-B |
Brand |
MSI | |
Model |
PRO B550M-B | |
Processor |
Processor support |
AMD AM4 |
Number of CPUs supported |
1 | |
Chipset |
Chipset |
AMD B550 |
Memory |
Memory format |
2 X DIMM 288-pin (DDR4) |
Memory Frequency(ies) |
DDR4 4600 MHz | |
| DDR4 4400 MHz | ||
| DDR4 4266 MHz | ||
| DDR4 4133 MHz | ||
| DDR4 4000 MHz | ||
| DDR4 3600 MHz | ||
| DDR4 2666 MHz | ||
| DDR4 2800 MHz | ||
| DDR4 2933 MHz | ||
| DDR4 3000 MHz | ||
| DDR4 3066 MHz | ||
| DDR4 3200 MHz | ||
| DDR4 3466 MHz | ||
Memory type |
DDR4 | |
Memory technology |
Dual Channel | |
Maximum RAM capacity per slot |
32 GB | |
Maximum RAM capacity |
64 GB | |
Graphic |
Integrated graphics controller |
No |
Compatible graphics core integrated in the CPU |
Yes | |
Expansion slots |
Graphic connector(s) |
1 X PCI Express 4.0 x16 |
Multi-GPU type |
None | |
Audio |
Audio Chipset |
Realtek ALC897 |
Number of audio channels |
8 | |
Network |
Number of ports/Ethernet controler |
1 X Realtek RTL8111HN |
Network standard(s) |
10/100/1000 Mbps | |
Wi-Fi |
No | |
Storage |
RAID supported |
Yes |
Hard drives connectors |
4 X Serial ATA 6Gb/s (SATA Revision 3) | |
| 1 X M.2 - PCI-E 4.0 x4 + SATA 6 Gb/s | ||
| 1 X M.2 - PCI-E 3.0 x4 | ||
Number of M.2 slot(s) |
2 | |
Supported RAID Modes |
10 | |
| 1 | ||
| 0 | ||
Connectivity |
Motherboard connector location |
Standard connectors (on the motherboard) |
Rear panel connectors |
1 X HDMI Female | |
| 1 X DisplayPort Female | ||
| 4 X USB 3.0 | ||
| 2 X USB 2.0 | ||
| 1 X RJ45 Female | ||
| 1 X MiniDin 6 Female (PS/2) | ||
| BIOS Flash Update | ||
| 3 X 3.5mm Jack Female Stereo | ||
Additional connectors |
2 X Addressable LED RGB connector(s) | |
| TPM | ||
| Front panel audio | ||
| Chassis intrusion | ||
| 1 X +12V (Power supply P8) | ||
| 1 X ATX 24 Pin | ||
| 1 X Serial (RS-232) | ||
| 4 X Internal USB 2.0 | ||
| 2 X Internal USB 3.0 | ||
| 1 X Internal USB 3.0 Type C | ||
| 2 X LED RGB connector(s) | ||
Physical characteristics |
Motherboard format |
Micro ATX |
Length |
244 mm | |
Width |
244 mm | |
Equipment |
Advanced overclocking features |
Yes |
Use |
Gaming | |
| Multimedia | ||
LED |
No | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
|
Safety Information |
Responsible person |
MSI Computer Europe B.V |
Postal address |
Science Park Eindhoven 5706 5692 ER Son, the Netherlands | |
Electronic Address |
gpsr@msi.com |
See all MSI products
Product referenced on 17 Jul 2026
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