MSI B550-A PRO
Motherboard | ATX | Socket AM4 | AMD B550 Chipset | USB-C Gen2, USB-C Gen1, USB 3.2 Gen 1, USB 3.2 Gen 2 | Gigabit LAN | onboard graphics (CPU required) | HD Audio (8-channel)
Images for illustration purposes only, actual product may differ
Main Specification
| Product Description | MSI B550-A PRO - motherboard - ATX - Socket AM4 - AMD B550 |
|---|---|
| Product Type | Motherboard - ATX |
| Chipset Type | AMD B550 |
| Processor Socket | 1 x Socket AM4 |
| Compatible Processors | Ryzen (supports 3rd Generation Ryzen and New Generation Ryzen with Radeon Graphics) |
| Max RAM Size | 128 GB |
| RAM Supported | 4 DIMM slots - DDR4, non-ECC, ECC (operate in non-ECC mode), unbuffered |
| Storage Ports | 6 x SATA-600 (RAID), 2 x M.2 |
| USB / FireWire Ports | 1 x USB-C Gen 2 + 1 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 + (1 x USB-C Gen 1 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 via headers) |
| Max Allocated RAM Size | 2 GB |
| Audio | HD Audio (8-channel) |
| LAN | Gigabit Ethernet |
General
| Product Type | Motherboard - ATX |
|---|---|
| Chipset Type | AMD B550 |
| Processor Socket | Socket AM4 |
| Max Processors Qty | 1 |
| Compatible Processors | Ryzen (supports 3rd Generation Ryzen and New Generation Ryzen with Radeon Graphics) |
Supported RAM
| Max Size | 128 GB |
|---|---|
| Technology | DDR4 |
| Bus Clock | 2400 MHz, 1866 MHz, 2133 MHz, 2800 MHz, 3000 MHz, 2666 MHz, 2933 MHz, 3466 MHz (O.C.), 3733 MHz (O.C.), 3600 MHz (O.C.), 3866 MHz (O.C.), 4000 MHz (O.C.), 4133 MHz (O.C.), 4400 MHz (O.C.), 4266 MHz (O.C.), 3200 MHz, 3066 MHz |
| Supported RAM Integrity Check | Non-ECC, ECC (operate in non-ECC mode) |
| Registered or Buffered | Unbuffered |
| Features | Dual channel memory architecture, supported ECC modules operate in non-ECC mode, A-XMP support |
Graphics
| Max Allocated RAM Size | 2 GB |
|---|
Audio
| Type | HD Audio (8-channel) |
|---|---|
| Audio Codec | Realtek ALC892 |
| Compliant Standards | High Definition Audio |
LAN
| Network Controller | Realtek RTL8111H |
|---|---|
| Network Interfaces | Gigabit Ethernet |
Expansion / Connectivity
| Expansion Slots | 1 x CPU 4 x DIMM 288-pin 1 x PCIe 4.0 x16 1 x PCIe 3.0 x16 (x4 mode (auto turn-off if M.2 is occupied)) 2 x PCIe 3.0 x1 |
|---|---|
| Storage Interfaces | SATA-600 -connectors: 6 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 SATA-600 / PCIe 4.0 -connectors: 1 x M.2 - RAID 0 / RAID 1 PCIe 3.0 -connectors: 1 x M.2 - RAID 0 / RAID 1 |
| Interfaces | 1 x LAN (Gigabit Ethernet) 1 x audio line-in - mini-jack 1 x audio line-out - mini-jack 1 x microphone - mini-jack 1 x audio line-out (side surround) - mini-jack 2 x USB 3.2 Gen 1 1 x USB 3.2 Gen 2 1 x audio line-out (center/subwoofer) - mini-jack 1 x audio line-out (rear) - mini-jack 1 x USB-C Gen2 1 x PS/2 keyboard / mouse 4 x USB 2.0 1 x HDMI 1 x DisplayPort |
| Internal Interfaces | 4 x USB 2.0 - header 2 x USB 3.2 Gen 1 - header 1 x USB-C Gen 1 - header 1 x audio - header |
| Power Connectors | 24-pin main power connector, 8-pin ATX12V connector |
Features
| Hardware Features | AMD CrossFireX technology support, Debug LED, Double ESD Protection, 2oz Copper PCB, M.2 Shield FROZR, MSI Core Boost, MSI PCIe Steel Slot, MSI Mystic Light Sync |
|---|
Miscellaneous
| Included Accessories | Case badge, I/O back cover |
|---|---|
| Cables Included | 2 x Serial ATA cable |
| Software Included | Drivers & Utilities |
| Width | 30.5 cm |
| Depth | 24.4 cm |
Product features
Turbo USB
Featuring the Turbo USB 3.2 Gen 2 10Gbps with reversible Type-C connector.DDR4 Boost
The fully isolated DDR circuit with Interdigital Tabbed Routing to deliver pure data signals and improve signal reliability at high frequencies.Lightning Gen 4 solution
The Gen 4 PCI-E and M.2 solution with up to 64GB/s bandwidth for maximum transfer speed.Flash BIOS button
Simply use a USB key to flash any BIOS within seconds, without installing a CPU, memory, or graphics card.Core Boost Technology
Combining premium layout design, that is ready for unleashing the maximum performance.Digital PWM
The high-quality component digital power IC makes sure your system runs smoothly under most extreme conditions.PCIe steel armor
Protecting VGA cards against bending and EMI for better performance, stability, and strength.7W/mK thermal pad
Premium 7W/mK thermal pad covered both MOSFET and chokes, provides better heat transfer to the heatsink.M.2 Shield Frozr
Strengthened built-in M.2 thermal solution. Keeps M.2 SSDs safe while preventing throttling, making them run faster.Pump fan support
Control water-cooling pump speeds for best flow and noise control.Extended heatsink
MSI extended PWM and enhanced circuit design ensures even high-end processors to run at full speed.User-friendly design
MSI motherboard features 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. It makes it so easy to install your own motherboard without any issue.Thermal solution for more cores and higher performance
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.Connectivity
The most important thing about DIY is expandability. MSI PRO Series motherboard features plenty of possibility for prosumers' needs. 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 motherboard supports all the storage standards, which allows users to connect any ultra-fast storage device. Higher efficiency makes your work easier.Experience more
MSI PRO Series motherboard is 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 high-quality applications are at your disposal. The extensive features let you fine-tune your system to deliver reliable maximum performance.PCB with 2oz thickened copper
An enhanced PCB design with 2oz thickened copper increases conductivity, improving heat dissipation and performance reliability especially during overclocking.Key selling points
- 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 Gen 4 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 PCIe slots
- Supports 2-way AMD CrossFire
References
MPN: B550-A PRO
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23/06/2026 17:30:13