Description
Ultra Performance
Designed for reliable everyday computing and gaming, the mATX MSI PRO B550M-P combines the AMD B550 chipset and AM4 socket with support for AMD Ryzen 5000, 5000 G-Series, 4000 G-Series, 3000, and 3000 G-Series desktop processors. With four DDR4 memory slots supporting up to 128GB, PCIe 4.0 graphics connectivity, two M.2 slots, four SATA 6Gbps ports, 1Gbps LAN, and front USB Type-C connectivity, it provides a versatile foundation for compact and efficient AMD-based systems. MSI's Core Boost, Memory Boost, Frozr AI Cooling, Audio Boost, and EZ DIY features further enhance performance, cooling, usability, and system management.
The MSI PRO B550M-P is a Micro ATX motherboard built on the AMD B550 chipset for Socket AM4, supporting AMD Ryzen (AM4) processors with DDR4 memory. The PRO series focuses on stability and practical features for business, office and everyday builds. PCIe and M.2 storage support cover current components.
AMD B550 Platform
The AMD B550 chipset paired with Socket AM4 supports AMD Ryzen (AM4) processors, and MSI's power design delivers the sustained current a high-core-count chip demands under all-core load. DDR4 memory support with AMD EXPO profiles means reaching rated speed is a matter of selecting one profile in the BIOS rather than tuning by hand. MSI's Core Boost technology combines the power design and circuit layout to keep delivery clean during sustained workloads.
Storage and Expansion
M.2 sockets provide fast NVMe storage with thermal shields fitted to prevent the throttling that affects bare drives during sustained transfers, alongside SATA ports for additional capacity. The primary graphics slot is steel-reinforced against the weight of heavy modern cards. MSI's EZ DIY features such as tool-free M.2 fitting speed up both assembly and later upgrades.
Connectivity and Audio
Rear connectivity covers USB, display outputs and Ethernet for everyday use, with front-panel headers for case connections. Audio is handled by an integrated codec with dedicated circuitry isolated from the rest of the board to reduce interference. Fan headers with software control let you tune cooling for quiet running or maximum airflow.
Practical Building Features
MSI's EZ Debug LED provides a straightforward first diagnostic if a build does not post, indicating whether the processor, memory, graphics card or boot device is at fault. That single feature saves a great deal of time compared with swapping components blind. The BIOS Flashback style utilities and MSI Center software handle firmware updates and system monitoring from the desktop.
Specification Details
Chipset AMD B550
CPU Supports AMD Ryzen™ 5000 Series, 5000 G-Series, 4000 G-Series, 3000 Series and 3000 G-Series desktop processors
Socket AM4
Memory 4x DDR4, Maximum Memory Capacity 128GB
DDR4 2667/2800/2933/3000/3066/3200/3466/3600/3733/3866/4000/4133/4266/4400+ MHz by A-XMP OC MODE
1DPC 1R: Up to 4400+ MT/s
1DPC 2R: Up to 3733+ MT/s
2DPC 1R: Up to 3866+ MT/s
2DPC 2R: Up to 3466+ MT/s
Supports JEDEC Speed
Supports Dual-Channel mode
Supports non-ECC, un-buffered memory
Supports Memory Overclocking by A-XMP OC mode
Onboard Graphics 1x HDMI™ 2.1, up to 4K 60Hz
1x DisplayPort 1.4, up to 4K 60Hz
1x VGA, up to 2048x1536 50Hz / 1920x1200 60Hz
Slot 1x PCI-E x16
2x PCI-E x1
PCI_E1: PCIe 4.0 x16 (CPU)
PCI_E2: PCIe 3.0 x1 (Chipset)
PCI_E3: PCIe 3.0 x1 (Chipset)
Audio Realtek® ALC897 Codec
7.1-Channel High Definition Audio
Storage 2x M.2
M.2_1: PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices
M.2_2: PCIe 3.0 x4, supports 2280/2260/2242 devices
4x SATA 6G
RAID RAID 0, RAID 1 and RAID 10 for SATA storage devices
RAID 0 and RAID 1 for M.2 NVMe storage devices
USB 2x USB 2.0 Rear
4x USB 2.0 Front
4x USB 5Gbps Type-A Rear
2x USB 5Gbps Type-A Front
1x USB 5Gbps Type-C Front
LAN Realtek® RTL8111H 1Gbps LAN
Internal IO 1x ATX Power Connector
1x CPU Power Connector
1x CPU Fan
2x System Fan
2x Front Panel
1x Chassis Intrusion
1x Front Audio
1x COM Port
2x Addressable V2 RGB LED Connectors
2x RGB LED Connectors
1x TPM 2.0 Header
4x USB 2.0 Ports
2x USB 5Gbps Type-A Ports
1x USB 5Gbps Type-C Port
LED Feature 4x EZ Debug LED
Back Panel Ports VGA
USB 5Gbps Type-A
Keyboard / Mouse
LAN Port
Audio Connectors
DisplayPort
HDMI™
USB 2.0
USB 5Gbps Type-A
Operating System Supports Windows® 11 64-bit
Supports Windows® 10 64-bit
PCB Info mATX
243.84mm x 243.84mm
