MSI B550-A Pro AM4 AMD ATX Motherboard
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. 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 at full speed with MSI motherboards. The 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. 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. 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. 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. Utilizing 3rd Gen Ryzen processors, MSI B550 motherboards feature the latest Lightning Gen 4 M.2 which is the fastest onboard storage solution on the market with up to 64 Gb/s transfer speed. An enhanced PCB design with 2oz thickened copper increases conductivity, improving heat dissipation and performance reliability especially during overclocking. Unleash and sustain maximum performance with an aggressive VRM design built with a total of 10 phases Digital Power with Doubler Design. Combining exclusive Core Boost technology, the PRO series motherboard is ready to sustain heavy daily work. 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. MSI OC LAB does not merely work hard on extreme overclocking. Compared to the B450 motherboard memory A-XMP profile, MSI does have great improvement in 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 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 but also creating the perfect conditions for your CPU overclocking.
Specifications:
| Basic Information |
| Supported CPU |
Supports AM4 socket 3rd Gen AMD Ryzen processors, and future AMD Ryzen processors with BIOS update. |
| Chipset |
AMD B550 |
| Form Factor |
ATX Form Factor
12 in. x 9.6 in. (30.5 cm x 24.4 cm) |
| Expansion Slots |
| PCI |
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 |
| M.2 Socket |
2x M.2 slots (Key M)
M2_1 slot (from AMD Processor)
PCIe 4.0/ 3.0 x4
SATA 6Gb/s
2242/ 2260/ 2280/ 22110 storage devices
M2_2 slot (from AMD B550 chipset)
Supports PCIe 3.0x4
Supports 2242/ 2260/ 2280 storage devices |
| Memory |
| Type |
Dual-channel memory architecture |
| Slots |
4x DDR4 memory slots |
| Supported Memory |
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
1DPC 1R Max speed 4800 MHz
1DPC 2R max speed 3866 MHZ
2DPC 1R max speed 4000 MHZ
2DPC 2R max speed 3600 MHZ
non-ECC UDIMM memory
ECC UDIMM memory (non-ECC mode)
un-buffered memory |
| Maximum Mamory |
128GB |
| Graphics |
| Graphics |
1x HDMI 2.1 port, supports a maximum resolution of 4096x2160 @60Hz
1x DisplayPort supports a maximum resolution of 4096x2160 @60Hz
Supports 2-Way AMD CrossFire Technology |
| Max Shared Memory |
16GB |
| Connector & Ports |
| HDMI |
1x HDMI 2.1 port, supports a maximum resolution of 4096x2160 @60Hz |
| Display Port (s) |
1x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz |
| USB (s) |
AMD B550 Chipset
3x USB 3.2 Gen 1 5Gbps ports (1 Type-C internal connector, and 2 ports are available through the internal USB 3.2 Gen 1 5Gbps connector)
8x USB 2.0 ports (4 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors)
AMD Processor
2x USB 3.2 Gen 2 10Gbps ports (1 Type-C port and 1 Type-A port on the back panel)
2x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel |
| LAN Port (s) |
1x Realtek 8111H Gigabit LAN controller |
| Supported Storage |
AMD B550 Chipset
6x SATA 6Gb/s ports
2x M.2 slots (Key M)
M2_1 slot (from AMD Processor)
PCIe 4.0/ 3.0 x4
SATA 6Gb/s
2242/ 2260/ 2280/ 22110 storage devices
M2_2 slot (from AMD B550 chipset)
Supports PCIe 3.0x4
Supports 2242/ 2260/ 2280 storage devices |
| Audio |
Realtek ALC892 Codec
7.1-Channel High Definition Audio |
| Internal I/O Ports |
24-pin ATX main power connector
8-pin ATX 12V power connector
SATA 6Gb/s connectors
M.2 slots (M-Key)
Type-C port
connector (2 USB 3.2 Gen 1 5Gbps port)
2.0 connectors (4 USB 2.0 ports)
CPU fan connector
4-pin water-pump fan connector
system fan connectors
Front panel audio connector
System panel connectors
Chassis Intrusion connector
4-pin RGB LED connector
3-pin RAINBOW LED connectors
TPM module connector
Clear CMOS jumper |
| Warranty Information |
| Manufacturing Warranty |
03 Years Warranty |
| Others |
| Special Features |
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 |
