MSI B550-A PRO
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MSI B550-A PRO
The MSI B550-A PRO motherboard, with its AMD B550 chipset, forms the foundation for high-performance PC builds on the AMD AM4 platform. It supports Ryzen 3000, 4000, and 5000 series processors and offers the modern PCIe 4.0 interface for graphics cards and fast NVMe SSDs. This ATX-format board delivers stability and efficiency for both professional and gaming use. With four DDR4 memory slots supporting frequencies up to 4400MHz and DDR4 Boost technology, it provides a solid base for multitasking and demanding applications. System management is simplified by MSI Center software, which consolidates utilities like Total Fan Control and Hardware Monitor into a single app. The CLICK BIOS 5 environment offers a clear interface for performance tuning, with modes for both beginners and advanced users. It also supports the Resizable BAR feature for better communication between the CPU and GPU. The board also includes a Flash BIOS button for updating the firmware without needing a processor, memory, or graphics card installed.
AMD B550
Chipset
AMD AM4
Socket
ATX
Form factor
DDR4
Memory type
4×
Number of RAM slotsKey features of the MSI B550-A PRO motherboard
- Uses an AMD B550 chipset with an AMD AM4 socket in an ATX form factor
- Four slots support DDR4 memory with frequencies up to 4400MHz (OC)
- Features one PCIe 4.0 x16 slot and two M.2 slots, one of which supports Gen4
- Storage options include two M.2 slots and six SATA III ports
- The network card provides a 1Gbps connection
- Processor power is handled by a 10+2+1 phase digital system
- Includes Flash BIOS for updates without a CPU and an M.2 Shield Frozr heatsink
Power and stability of the MSI B550-A PRO board
The 10+2+1 phase digital power system with a precise PWM controller delivers stable energy to the processor for demanding operations. Core Boost technology optimises current delivery to key points with high precision. The reliability of the entire system is supported by a PCB with a thickened copper layer, which improves conductivity, dissipates heat more effectively, and strengthens signal integrity during overclocking.
Fast PCIe 4.0 interface
The board harnesses the full potential of the B550 chipset, offering a PCIe 4.0 x16 slot for graphics cards with a bandwidth of up to 64GB/s. This slot is also reinforced with Steel Armor technology, which protects it from damage by heavy graphics cards. For ultra-fast storage, there is an M.2 slot with Lightning Gen4 x4 support, connected directly to the processor for minimal latency and fast loading of games and applications.
Cooling for key motherboard components
To maintain low temperatures, the board uses several cooling elements. The Extended Heatsink Design effectively dissipates heat from the VRM. The high-speed M.2 SSD is protected by the passive M.2 Shield Frozr heatsink, which prevents performance throttling due to heat. In addition, the Total Fan Control system gives you full control over the fans in the BIOS and software, including the ability to set up to four temperature targets.
Memory and multi-GPU support
The four DIMM slots support dual-channel DDR4 RAM with frequencies up to 4400MHz (OC). DDR4 Boost technology isolates the memory circuits for a cleaner data signal and greater stability. A-XMP profiles in the BIOS simplify setting optimal memory speed and timing. To boost graphics performance, the board supports AMD CrossFire technology, which is used to connect two graphics cards in the reinforced PCIe Steel Armor slots.
Connectivity and ports on the MSI B550-A PRO
The rear panel includes USB 3.2 Gen 2 ports for data transfer speeds up to 10Gb/s, complemented by USB 3.2 Gen 1 and USB 2.0. For internal connections, there are headers for additional USB ports, including a USB-C connector for the front panel of the case. You can connect to the network using the integrated 1Gbps LAN port, and the eight-channel Realtek ALC897 audio chip with Audio Boost technology provides a clean sound output.
Port layout
Storage
- Number of SATA III: 6
- Number of M.2: 2
- M.2 Slot - 1× M.2 PCI-E NVMe Gen4 / SATA
- M.2 Slot - 1× M.2 PCI-E NVMe Gen3
- Features: RAID 0, RAID 1, RAID 10
USB ports
- Internal USB 2.0: 4 (2 headers)
- Internal USB 3.2 Gen 1: 2 (1 header)
- Internal USB-C 3.2 Gen 1: 1 (1 header)
- Rear USB 3.2 Gen 2: 1× Type-A, 1× USB-C
- Rear USB 3.2 Gen 1: 2
- Rear USB 2.0: 4
Graphics
- HDMI: 2.1
- DisplayPort: 1
Audio
- Number of channels: 7.1
- Rear connectors: audio jacks
- Internal connectors: front panel audio connector
Other
- Rear connectors: Keyboard / Mouse, RJ-45 (LAN) 1Gbps, Flash BIOS Button
- Power: 24pin, 1× 8pin
- Cooling: 1× CPU FAN, 1× water-pump FAN, 6× SYS FAN
- Internal: 1× RGB LED connector, 2× RAINBOW LED connectors, TPM module connector, Clear CMOS jumper, Chassis Intrusion connector
Choosing a motherboard
When choosing a motherboard, it’s important to pay close attention to the socket type, form factor, and chipset. These are the most crucial parameters, ensuring the board is compatible with the processor, expansion cards, and other components. The specific socket determines your choice of processor, while the remaining connectors dictate which other components you'll need for your future PC.Specifications
Socket and chipset
Format & functions
Memory
Advanced parameters
Connectors
Series
Compatibility
Colour
| Code: | AA393f1 |
| Warranty: | 36 months |
| Links: | Producer's Website: |
| Manufacturer information |
Micro-Star International Co Ltd. C/O MSI Computer Europe BV, Science Park Eindhoven 5706, 5692 ER, Son, Netherlands, [email protected] The Taiwanese company MSI (Micro-Star International) has earned a solid place in the world of IT, mainly producing motherboards for desktop computers. However, it also produces high quality graphics cards, barebone computers, notebook computers, networking products, servers, and many other computer components. MSI products support the latest technologies and provide the performance necessary for all applications. Recently, the company has begun making a name for itself in the growing segment of gaming notebooks. 
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