MSI AMD B550-A PRO ATX Motherboard with Dual M.2, PCIe 4.0, Gigabit Ethernet, HDMI/DisplayPort, SATA 6 Gbps
PRO series helps users work smarter by delivering an efficient and productive experience. Featuring stable functionality and high-quality assembly, PRO series motherboards provide not only optimized professional workflows but also less troubleshooting and longevity.
- Support for 3rd Gen AMD Ryzen™ processors and future AMD Ryzen™ processors with BIOS update
- Supports DDR4 Memory, up to 4400(OC) MHz
- Lightning Fast Experience: PCIe 4.0, Lightning Gen4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2
- Premium Thermal Solution: Extended Heatsink Design with additional choke thermal pad and 7W/mK pad, and M.2 Shield Frozr are built for high performance system and non-stop works
- Powerful Design: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, Creator Genie, DDR4 Boost
- Audio Boost: Reward your ears with studio grade sound quality
- Multi-GPU: With Steel armor PCI-E slots. Supports 2-Way AMD Crossfire™
- Dragon Center: A brand new software which integrates all MSI exclusive tools with user friendly user interface.
User Friendly Design
MSI motherboards feature tons of convenient and smart design for DIY users, countless system tuning and troubleshooting tools are at your disposal to push your system to new heights and satisfy even the most demanding tweaker. Makes it so easy to install your own motherboard without any issue.
- Extended Heatsink Design
With more cores' processors, thermal and power design is more important to make sure the temperature keeps lower. MSI extended PWM heatsink with 7W/mK thermal pad ensures even high-end processors to run in full speed with MSI motherboards.
- M.2 Shield Frozr
World's fastest SSDs can start to lower performance when getting hot. Part of the motherboards heatsink design, M.2 SHIELD FROZR is the next generation M.2 thermal solution to avoid this by offering the best thermal protection to make sure that SSD maintains maximum performance.
- Fully Controllable in BIOS and Software
MSI motherboards let you manage speeds and temperatures for all your system and CPU fans. Total Fan Control allows you check your primary system characteristics in a simplified graphical interface. You can also set up to 4 temperature targets for CPU and motherboard, which will adjust the fan speeds automatically.
- Optimized for Water Cooling
Designed to support the most popular All-In-One & customized water cooling solutions on the market. A dedicated water pump PIN header supports up to 3 amp, giving you full control of the water pump speed. A clearly marked 'keep-out-zone' allows for easy and safe installation and a perfect fit.
- Flash BIOS Button
Run into trouble when updating your BIOS? Simply flash the old BIOS version back and continue working within minutes with Flash BIOS Button. Flash BIOS Button even works without a CPU, memory or graphics card installed!
- EZ Debug LED
Run into trouble? Onboard LEDs for key components will indicate the source of the problem so you know exactly where to look to get up and running again.
- XL Clip
The enlarged PCI-E clip helps you swap or remove your devices easier. Keep the PCI-E slot stronger and safer.
- Keep Out Zone
Circuits have been routed away from the case standoff keep out zones to minimize the damage impacts of misplaced mounting pieces.
- Atypical PCB
Not clever at cable arrangement? MSI Atypical PCB design not only the identity of stylish but also makes SATA and USB cable routing easier. Arranges cable neatly even you are not familiar with system build.
- Steel Armor
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.
- Double ESD Protection
Double ESD protection doubles up the grounding layer around the mounting holes, preventing static discharge surges from damaging the motherboard.
The most important thing of DIY is expandability. MSI PRO series motherboards feature plenty possibility for prosumers’ need. Stable LAN, faster storage and USB transfer speed and other expandable connectors are ready to enlarge your flexibility.
- Fast and Future-ready Storage
MSI PRO series motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Higher efficiency makes your work easier.
- Lightning Gen4 M.2
Utilizing 3rd Gen Ryzen processors, MSI B550 motherboards feature latest Lightning Gen 4 M.2 which is the fastest onboard storage solution on the market with up to 64 Gb/s transfer speed.
- USB 3.2 Gen2
Read and write your files over USB faster than ever. MSI PRO series motherboards offer a wide variety of options to connect and boost your USB devices, delivering 10Gbps transferring speed by both USB 3.2 Gen 2 Type-A and Type-C.
- Front USB Type-C
MSI motherboards support USB Front Type-C™ that allows gamers to connect with the latest USB devices. Built up a system with MSI PC case to have the most convenient experience.
Mystic Light Sync
Add your color if you want! Mystic Light Extension pin header provides an intuitive way to control additional RGB strips and other RGB peripherals added to a system, without needing a separate RGB controller.
Connects 3-pin 5V Addressable LED strip.
Connects 4-pin 12V RGB LED strip.
MSI PRO series motherboards are designed to satisfy any professional workflow. Elevate your listening pleasure and enjoy extreme sound quality. Moreover, with years of experience in creating performance enhancing tools that are easy to use, only the highest quality applications are at your disposal. The extensive features let you fine-tune your system to deliver reliable maximum performance.
- 2oz Thickened Copper
An enhanced PCB design with 2oz thickened copper increases conductivity, improving heat dissipation and performance reliability especially during overclocking.
- Power Design: 10+2+1 Duel Rail Power System
Unleash and sustain maximum performance with an aggressive VRM design built with a total of 10 Duet Rail Power System(DRPS). Combining exclusive Core Boost technology, PRO series motherboard is ready to sustain heavy daily work.
- Lightning Gen4 PCI-E
MSI lightning Gen 4 PCI-E is the latest and the fastest PCI-E data transfer solution with 64GB/s of unidirectional transfer bandwidth that has doubled compared to its previous generation. PCIe 4.0 maintains both backward and forward compatibility with older and newer specifications. Optimized by steel armor design and server grade PCB, you can enjoy next-gen devices without any compromise.
- DDR4 Boost and A-XMP
MSI OC LAB does not merely work hard on extreme overclocking. Compared to B450 motherboard memory A-XMP profile, MSI does have great improvement on performance and efficiency for B550 motherboards. Easy to enable A-XMP profile with auto power settings to get the best memory speed and stability.
- Core Boost
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.
AMD® Processor Support:
This MSI Motherboard supports AMD AM4 Socket 3rd Gen AMD Ryzen™ Processors.
Operating System Support:
Requires Windows® 10, 64 bit
|Make and Model||MSI PRO Series B550-A PRO ATX Motherboard|
|CPU Support||Supports AM4 socket 3rd Gen AMD Ryzen™ processors, and future AMD Ryzen™ processors with BIOS update. *
* See supported processors
|Memory||4 x DDR4 slots, support up to 128GB
Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 MHz by JEDEC
Supports DDR4 2667/ 2800 /2933 /3000 /3066 /3200 /3466 /3600/ 3733 /3866 /4000 /4133 /4266 /4400+ MHz by A-XMP OC MODE
Dual channel memory architecture
Supports non-ECC UDIMM memory
Supports ECC UDIMM memory (non-ECC mode)
Supports un-buffered memory
See supported memory
|Integrated Graphics||1x HDMI port, supports a maximum resolution of 4096x2160 @24Hz
1x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz
Maximum shared memory of 2048 MB
|Storage||AMD B550 Chipset:
2x M.2 slots (Key M)
M2_1 slot (from AMD Processor): Supports PCIe 4.0/ 3.0 x4
M2_2 slot (from AMD B550 chipset): Supports PCIe 3.0x4
6 x SATA 6Gb/s port(s)
|RAID||Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
Supports RAID 0 and RAID 1 for M.2 NVMe storage devices
|Expansion Slots||1x PCIe 4.0/ 3.0 x16 slot (PCI_E1)
1x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed
2x PCIe 3.0 x1 slots
|Multi-GPU Support||Supports 2-Way AMD CrossFire™ Technology|
AMD B550 Chipset:
|LAN||Realtek® 8111H Gigabit LAN controller|
|Audio||Realtek® ALC892 Codec
7.1-Channel High Definition Audio
|Back Panel I/O Ports||1 x PS/2 keyboard/mouse combo port(s)
1 x DisplayPort
1 x HDMI
1 x USB 3.2 Gen 2 10Gbps Type-A+C
2 x USB 3.2 Gen 1 5Gbps Type-A
4 x USB 2.0 ports
1 x LAN (RJ45) port
6 x Audio jack(s)
1 x Flash BIOS button
|Internal I/O||1x 24-pin ATX main power connector
1x 8-pin ATX 12V power connector
6x SATA 6Gb/s connectors
2x M.2 slots (M-Key)
1x USB 3.2 Gen 1 5Gbps Type-C port
1x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports)
2x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
1x 4-pin CPU fan connector
1x 4-pin water-pump fan connector
6x 4-pin system fan connectors
1x Front panel audio connector
2x System panel connectors
1x Chassis Intrusion connector
1x 4-pin RGB LED connector
2x 3-pin RAINBOW LED connectors
1xTPM module connector
1x Clear CMOS jumper
|Operating System||Support for Windows® 10, 64 bit|
|Form Factor||ATX Form Factor:
30.5 x 24.4 cm (12" x 9.6")