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MSI PRO B550M-B motherboard AMD B550 Socket AM4 micro ATX
SKU
PRO B550M-B
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In Stock: 2 available
Socket AM4, AMD B550 Chipset, 2 x DDR4-SDRAM up to 64GB, LAN, 4 x SATA III, 2 x M.2(M), UEFI AMI, Micro ATX
- Supports AMD RyzenTM 5000 Series, 5000 G-Series, 4000 G-Series, 3000 Series, and 3000 G-Series processors
- Supports DDR4 Memory, up to 4600+ MT/s (OC)
- Lightning Fast Experience: PCIe 4.0 slot and Lightning Gen4 x4 M.2
- EZ DIY: EZ Debug LED, EZ Mounting
- Audio Boost: Reward your ears with studio-grade sound quality
- MSI Center: A brand-new software which integrates all MSI exclusive tools with user-friendly user interface.
Category: Motherboards
PRO B550M-B is engineered with PCIe 4.0 M.2, Frozr AI Cooling, and Front Type-C, ready for the AMD Ryzen™ 5000 series processors.
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.
MSI motherboards circuitry ensure the case standoff keep out zones are pure and clean. Moreover, the protective paint is printed around each screw hole to prevent parts from being scratched or damaged to the motherboard.
EZ DEBUG LED
Onboard LEDs will indicate the source of the problem so you know exactly where to look to get up and running again.
A host of features inject artificial intelligence into key aspects of your computing experience to make smarter, real-time optimizations. The MSI Center offers a clean, minimal interface to customize and manage your PC settings. The AI Engine, for example, automatically adjusts settings based on the applications you're using, ensuring seamless performance.
Core Boost technology combines MSI's premium layout and optimized power design which allows for faster and undistorted current delivery to the CPU at pin-point precision. Not only supporting multi-core CPU, also creating the perfect conditions for your CPU overclocking.
Exclusive MSI Memory Boost technology utilizes an optimized and isolated DDR4 circuit design to ensure pure and undisturbed signals, significantly enhancing performance and efficiency.
Transient Voltage Suppressors (TVS) are safety devices used to protect against excessive voltage. All motherboard models of MSI are equipped with TVS. When the voltage abnormally rises, the TVS switches from a high-resistance state to a low-resistance state, diverting the excessive voltage to ground. This helps prevent circuit damage caused by high voltage.
The 8-pin, 8-pin, and 24-pin power connectors of MSI motherboards are all designed with solid pins. The solid pin design allows for a more stable transmission of 12V power to the CPU, even when handling high current loads.
Corrosive resistance IO Shield to help improve static electricity and reduce electromagnetic radiation noise from the system as well as more durable compare to traditional IO Shields.
MSI motherboards prioritize safety with the embedded Overcurrent Protection (OCP), ensuring crucial components such as the USB ports, DDR memory, PWM IC, and CPU are shielded from excessive current. This proactive defense mechanism curtails the risk of damage or malfunction due to power surges, promoting long-term system stability. This commitment to safeguarding your hardware underscores MSI's dedication to producing motherboards that prioritize durability and stability.
The grounding structure of power phases is the MSI's exclusive design. This patented design enables to suppress the electromagnetic interference (EMI) generated by the power phases and helps to efficiently conduct heat to the copper plane with grounding properties.
Chipset Heatsink
The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.
Connect and synchronize with MSI coolers and cases with strategically positioned pin-header locations, including a CPU fan header and a SYSTEM fan header.
Cooling Wizard serves as a comprehensive solution for managing fan settings across all MSI products. It ensures superior cooling performance and noise reduction for your gaming PC, offering compatibility with PWM/DC fans and pumps, customizable options, and intuitive temperature monitoring for optimal operation with one click.
Frozr AI Cooling targets CPU and GPU temperatures. The AI system detects CPU and GPU temperatures and automatically adjusts the fan duty of system fans to ensure optimal performance.
MSI fan headers automatically detect fans running in DC or PWM mode for optimal tuning of fan speeds and silence. Hysteresis also makes your fans spin up fluently to make sure your system stays silent, no matter what.
MSI AI LAN Manager automatically classifies and prioritizes the latency-sensitive applications for online games, giving you the best online gaming experience with low latency.
MSI PRO series motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Start games faster, load levels faster and have a real advantage over your enemies.
LIGHTNING GEN 4 PCI-E
MSI lightning Gen 4 PCI-E represents the bandwidth of a x16 interface to 64GB/s that has doubled compared to its previous generation.
REINFORCED,
HEAVY SOLDERED CONNECTIONS
MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts, Steel Armor shields the point of contact from electromagnetic interference.
Splash on some color and vibrant RGB lighting effects using Mystic Light utility of MSI Center, which has million colors and fancy LED effects. Enjoy the full control and creativity of your PC's lighting with one software.
MSI brand new MSI Center unifies a suite of MSI software utilities into a single centralized application. Take control of advanced motherboards features and unleash endless possibilities.
Multiple layers of protection for your devices, online privacy features including our Secure VPN, plus Dark Web Monitoring - all in a single solution. With MSI motherboards, you can enjoy a 60-day free trial of Norton 360.
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.
MSI motherboards circuitry ensure the case standoff keep out zones are pure and clean. Moreover, the protective paint is printed around each screw hole to prevent parts from being scratched or damaged to the motherboard.
EZ DEBUG LED
Onboard LEDs will indicate the source of the problem so you know exactly where to look to get up and running again.
A host of features inject artificial intelligence into key aspects of your computing experience to make smarter, real-time optimizations. The MSI Center offers a clean, minimal interface to customize and manage your PC settings. The AI Engine, for example, automatically adjusts settings based on the applications you're using, ensuring seamless performance.
Core Boost technology combines MSI's premium layout and optimized power design which allows for faster and undistorted current delivery to the CPU at pin-point precision. Not only supporting multi-core CPU, also creating the perfect conditions for your CPU overclocking.
Exclusive MSI Memory Boost technology utilizes an optimized and isolated DDR4 circuit design to ensure pure and undisturbed signals, significantly enhancing performance and efficiency.
Transient Voltage Suppressors (TVS) are safety devices used to protect against excessive voltage. All motherboard models of MSI are equipped with TVS. When the voltage abnormally rises, the TVS switches from a high-resistance state to a low-resistance state, diverting the excessive voltage to ground. This helps prevent circuit damage caused by high voltage.
The 8-pin, 8-pin, and 24-pin power connectors of MSI motherboards are all designed with solid pins. The solid pin design allows for a more stable transmission of 12V power to the CPU, even when handling high current loads.
Corrosive resistance IO Shield to help improve static electricity and reduce electromagnetic radiation noise from the system as well as more durable compare to traditional IO Shields.
MSI motherboards prioritize safety with the embedded Overcurrent Protection (OCP), ensuring crucial components such as the USB ports, DDR memory, PWM IC, and CPU are shielded from excessive current. This proactive defense mechanism curtails the risk of damage or malfunction due to power surges, promoting long-term system stability. This commitment to safeguarding your hardware underscores MSI's dedication to producing motherboards that prioritize durability and stability.
The grounding structure of power phases is the MSI's exclusive design. This patented design enables to suppress the electromagnetic interference (EMI) generated by the power phases and helps to efficiently conduct heat to the copper plane with grounding properties.
Chipset Heatsink
The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.
Connect and synchronize with MSI coolers and cases with strategically positioned pin-header locations, including a CPU fan header and a SYSTEM fan header.
Cooling Wizard serves as a comprehensive solution for managing fan settings across all MSI products. It ensures superior cooling performance and noise reduction for your gaming PC, offering compatibility with PWM/DC fans and pumps, customizable options, and intuitive temperature monitoring for optimal operation with one click.
Frozr AI Cooling targets CPU and GPU temperatures. The AI system detects CPU and GPU temperatures and automatically adjusts the fan duty of system fans to ensure optimal performance.
MSI fan headers automatically detect fans running in DC or PWM mode for optimal tuning of fan speeds and silence. Hysteresis also makes your fans spin up fluently to make sure your system stays silent, no matter what.
MSI AI LAN Manager automatically classifies and prioritizes the latency-sensitive applications for online games, giving you the best online gaming experience with low latency.
MSI PRO series motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Start games faster, load levels faster and have a real advantage over your enemies.
LIGHTNING GEN 4 PCI-E
MSI lightning Gen 4 PCI-E represents the bandwidth of a x16 interface to 64GB/s that has doubled compared to its previous generation.
REINFORCED,
HEAVY SOLDERED CONNECTIONS
MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts, Steel Armor shields the point of contact from electromagnetic interference.
Splash on some color and vibrant RGB lighting effects using Mystic Light utility of MSI Center, which has million colors and fancy LED effects. Enjoy the full control and creativity of your PC's lighting with one software.
MSI brand new MSI Center unifies a suite of MSI software utilities into a single centralized application. Take control of advanced motherboards features and unleash endless possibilities.
Multiple layers of protection for your devices, online privacy features including our Secure VPN, plus Dark Web Monitoring - all in a single solution. With MSI motherboards, you can enjoy a 60-day free trial of Norton 360.
| Internal I/O | |
|---|---|
| Number of M.2 (M) slots | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 1 |
| Total number of SATA connectors | 4 |
| Front panel connector | Yes |
| Supported storage drive interfaces | M.2, NVMe, PCI Express 3.0, PCI Express 4.0, SATA |
| USB 2.0 connectors | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| TPM connector | Yes |
| Number of SATA connectors | 4 |
| Number of SATA III connectors | 4 |
| Front panel audio connector | Yes |
| CPU fan connector | Yes |
| Chassis intrusion connector | Yes |
| ATX Power connector (24-pin) | Yes |
| RGB LED pin header | Yes |
| Technical details | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Supported processor sockets | Socket AM4 |
| Parallel processing technology support | Not supported |
| On-board graphics card | No |
| HDMI version | 2.1 |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Total number of SATA connectors | 4 |
| Audio | |
| Audio output channels | 7.1 channels |
| Performance | |
| Windows operating systems supported | Windows 10 x64, Windows 11 x64 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| RAID levels | 0, 1, 5, 10 |
| Supported processor sockets | Socket AM4 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 3000 Series, AMD Ryzen 4000 Series, AMD Ryzen 5000 Series |
| Supported processor sockets | Socket AM4 |
| Processor socket | Socket AM4 |
| Memory | |
| Number of memory slots | 2 |
| Memory slots type | DIMM |
| Supported memory types | DDR4-SDRAM |
| Memory channels | Dual-channel |
| Supported memory clock speeds | 2667,2800,2933,3000,3066,3200,3466,3600,3733,3866,4000,4133,4266,4400,4600 MHz |
| Maximum internal memory | 64 GB |
| Unbuffered memory | Yes |
| Supported memory clock speed (max) | 4600 MHz |
| ECC сompatibility | Non-ECC |
| Storage controllers | |
| Supported storage drive interfaces | M.2, NVMe, PCI Express 3.0, PCI Express 4.0, SATA |
| RAID levels | 0, 1, 5, 10 |
| Number of storage drives supported | 6 |
| RAID support | Yes |
| Graphics | |
|---|---|
| Parallel processing technology support | Not supported |
| On-board graphics card | No |
| Rear panel I/O ports | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 0 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 0 |
| DisplayPort version | 1.2 |
| USB 2.0 ports quantity | 2 |
| VGA (D-Sub) ports quantity | 0 |
| HDMI version | 2.1 |
| HDMI ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 0 |
| DVI-D ports quantity | 0 |
| DisplayPorts quantity | 1 |
| Network | |
| Ethernet LAN | Yes |
| Wi-Fi | No |
| LAN controller | Realtek RTL8111H |
| Ethernet interface type | Gigabit Ethernet |
| Features | |
| Windows operating systems supported | Windows 10 x64, Windows 11 x64 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Supported processor sockets | Socket AM4 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Audio chip | Realtek ALC897 |
| Expansion slots | |
| Number of M.2 (M) slots | 2 |
| PCI Express x16 slots | 1 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| 1st M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 largest key size | 22110 |
| 2nd M.2 highest PCI Express generation | 3.0 |
| BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| ACPI version | 6.0 |
| System Management BIOS (SMBIOS) version | 3.7 |
| Software | |
| Windows operating systems supported | Windows 10 x64, Windows 11 x64 |
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|---|---|---|---|---|---|---|
| SKU |
PRO B550M-B
|
B550-A PRO
|
MPG B550 GAMING PLUS
|
B550 GAMING X V2
|
90MB1A10-M0EAY0
|
90MB1AM0-M0EAYC
|
| Manufacturer |
MSI
|
MSI
|
MSI
|
Gigabyte
|
ASUS
|
ASUS
|
| Component for |
PC
|
PC
|
PC
|
PC
|
PC
|
PC
|
| Motherboard form factor |
micro ATX
|
ATX
|
ATX
|
ATX
|
micro ATX
|
Thin Mini iTX
|
| Number of memory slots |
2 to 3
|
4 to 6
|
4 to 6
|
4 to 6
|
2 to 3
|
2 to 3
|
| Processor manufacturer |
AMD
|
AMD
|
AMD
|
AMD
|
Intel
|
Intel
|
| Processor socket |
Socket AM4
|
Socket AM4
|
Socket AM4
|
Socket AM4
|
LGA 1700
|
LGA 1700
|
| Supported memory types |
DDR4-SDRAM
|
DDR4-SDRAM
|
DDR4-SDRAM
|
DDR4-SDRAM
|
DDR4-SDRAM
|
DDR4-SDRAM
|





