Asus PRIME B550M-A AC Desktop Motherboard - AMD B550 Chipset - Socket AM4 - Micro ATX - Wi-Fi AC - 4x DDR4 Slots
Business volume discounts
Technical guidance
Preparation & staging
QC · ON · AB · BC
Product Features
Technical Overview
At its core, the PRIME B550M-A AC utilizes the AMD B550 chipset, which provides robust support for PCIe 4.0 lanes when paired with compatible Ryzen processors. The board accommodates a single CPU through the Socket AM4 interface, compatible with Ryzen 3, 5, 7, 9 series and their PRO counterparts, offering flexibility for various performance tiers.
Memory configuration is handled by four DDR4 DIMM slots that support unbuffered memory modules. The board's storage subsystem includes four SATA 6Gb/s ports and two M.2 slots for NVMe or SATA-based SSDs, with RAID 0, 1, and 10 support available for data redundancy or performance striping.
Relevant factors for this section include Chipset Manufacturer, Chipset Model, Total Processor Supported, Number of Memory Slots. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
This motherboard stands out with its integrated wireless connectivity, featuring 802.11a/b/g/n/ac Wi-Fi and Bluetooth, eliminating the need for separate adapter cards in builds requiring wireless networking. The comprehensive video output selection—HDMI, DVI, and VGA—ensures compatibility with a wide range of displays, from modern monitors to legacy projectors.
Enhanced Thermal Design
The board's layout and heatsink placement are optimized for efficient heat dissipation, maintaining stable operation during extended use.
- Optimized PCB trace routing
- Strategic component placement
- Adequate spacing for airflow
Audio Quality
7.1 channel high-definition audio delivers immersive sound for gaming, multimedia, and communication applications.
- Crystal-clear audio output
- Reduced electromagnetic interference
- S/PDIF header for digital audio
Deployment / Use Cases
The PRIME B550M-A AC is ideally suited for mainstream desktop builds where balanced performance and connectivity are priorities. Its Micro ATX form factor makes it an excellent choice for compact gaming systems, home theater PCs, and office workstations that require a smaller footprint without sacrificing essential features.
Business environments will appreciate the board's support for Ryzen PRO processors, enabling enhanced security and manageability features. The integrated Wi-Fi and Bluetooth simplify deployment in locations where wired networking is impractical, while the multiple display outputs support multi-monitor setups for productivity or digital signage applications.
Gaming Systems
Provides a stable platform for mid-range gaming builds with support for high-speed memory and multiple GPU configurations through the PCIe x16 slot.
Office Workstations
Offers reliable performance for business applications with PRO processor support, RAID capabilities for data protection, and multiple connectivity options.
Physical Profile
The motherboard follows the standard Micro ATX form factor with dimensions of 9.60 inches (243.84 mm) square, ensuring compatibility with most Micro ATX and many ATX chassis. This compact size allows for flexible system builds while providing sufficient room for component installation and cable management.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 9.60" (243.84 mm), 9.60" (243.84 mm). This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 9.60" (243.84 mm)
- Depth
- 9.60" (243.84 mm)
Highlights
- AMD B550 chipset with Socket AM4 support for Ryzen processors
- Micro ATX form factor for compact system builds
- Integrated 802.11a/b/g/n/ac Wi-Fi and Bluetooth connectivity
- Four DDR4 memory slots supporting up to 128GB RAM
- Two M.2 slots and four SATA 6Gb/s ports for storage expansion
- HDMI, DVI, and VGA video outputs for display flexibility
- 7.1 channel high-definition audio with S/PDIF header
- RAID 0, 1, and 10 support for data protection
- RoHS compliant for reduced environmental impact
- Six USB 3.2 ports for high-speed peripheral connectivity
Specifications
| Specifications | |
|---|---|
| Manufacturer | ASUS Computer International |
| Manufacturer Part Number | PRIME B550M-A AC |
| Brand Name | Asus |
| Product Line | Prime |
| Product Model | B550M-A AC |
| Product Name | Prime B550M-A AC Desktop Motherboard |
| Product Type | Desktop Motherboard |
| Processor & Chipset | |
| Chipset Manufacturer | AMD |
| Chipset Model | B550 |
| Total Processor Supported | 1 |
| Processor Socket | Socket AM4 |
| Processor Supported | Ryzen 3,Ryzen 5,Ryzen 7,Ryzen 9,Ryzen 5 Pro,Ryzen 7 PRO,Ryzen 9 PRO,Ryzen 3 PRO |
| Memory | |
| Number of Memory Slots | 4 |
| Memory Form Factor | DIMM,UDIMM |
| Maximum Memory Supported | 128 GB |
| Memory Speed Supported | 2133 MHz,2400 MHz,2666 MHz,2800 MHz,3000 MHz,3200 MHz,3333 MHz,3466 MHz,3866 MHz,3600 MHz,3733 MHz,4000 MHz,4133 MHz,4466 MHz,4600 MHz,4400 MHz,4800 MHz,4266 MHz,4200 MHz,3400 MHz,4333 MHz,4866 MHz |
| Memory Technology | DDR4 SDRAM |
| I/O Controller | |
| Controller Type | Serial ATA/600 |
| RAID Supported | Yes |
| RAID Levels | 0,10,1 |
| Video | |
| Onboard Video | CPU Dependent Video |
| Audio | |
| Audio Channels | 7.1 |
| Network & Communication | |
| Bluetooth | Yes |
| Gigabit Ethernet | Yes |
| Wireless LAN | Yes |
| Wireless LAN Standard | IEEE 802.11a/b/g/n/ac |
| I/O Expansions | |
| Total Number of Expansion Slots | 3 |
| Total Number of PCI Express Slots | 3 |
| Number of PCI Express x1 Slots | 2 |
| Number of PCI Express x16 Slots | 1 |
| Interfaces/Ports | |
| Total Number of USB Ports | 6 |
| Number of USB 3.2 Ports | 6 |
| VGA | Yes |
| HDMI | Yes |
| DVI | Yes |
| Number of Network (RJ-45) Ports | 1 |
| Onboard Interfaces | |
| Number of SATA Interfaces | 4 |
| Number of M.2 Interfaces | 2 |
| Total Number of Onboard USB Ports | 6 |
| Number of Onboard USB 2.0 Ports | 4 |
| Number of Onboard USB 3.2 Ports | 2 |
| Onboard S/PDIF Header | Yes |
| Physical Characteristics | |
| Form Factor | Micro ATX |
| Width | 9.60" (243.84 mm) |
| Depth | 9.60" (243.84 mm) |
| Miscellaneous | |
| Environmentally Friendly | Yes |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) |
| Country of Origin | China |
FAQ
Which AMD Ryzen processors are compatible with this motherboard?
The PRIME B550M-A AC supports AMD Ryzen processors using the Socket AM4 interface, including Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9 series, and their PRO variants (Ryzen 3 PRO, Ryzen 5 PRO, Ryzen 7 PRO, Ryzen 9 PRO). This broad compatibility allows you to choose processors ranging from entry-level to high-performance models based on your computing needs.
What is the maximum memory capacity and speed supported?
This motherboard features four DDR4 memory slots that support a maximum capacity of 128GB. It accommodates a wide range of memory speeds from 2133 MHz up to 4866 MHz, providing flexibility for performance tuning. The board uses unbuffered DIMM modules (UDIMM) in dual-channel configuration for optimal memory performance.
Does this motherboard have built-in Wi-Fi and Bluetooth?
Yes, the PRIME B550M-A AC includes integrated wireless connectivity with 802.11a/b/g/n/ac Wi-Fi (Wi-Fi 5) and Bluetooth. This eliminates the need for separate wireless adapter cards and simplifies system setup in environments where wired Ethernet connections are not available or practical.
How many storage devices can I connect to this motherboard?
You can connect up to six storage devices simultaneously: four through the SATA 6Gb/s ports and two through the M.2 slots. The M.2 slots support both NVMe and SATA-based SSDs, while the SATA ports accommodate traditional hard drives or SSDs. The board also supports RAID 0, 1, and 10 configurations for performance or redundancy.
What video outputs are available on this motherboard?
The motherboard provides three video output options: HDMI, DVI, and VGA. This comprehensive selection ensures compatibility with virtually any display, from modern monitors with HDMI inputs to older monitors or projectors using VGA connections. The onboard video capability is processor-dependent, requiring a Ryzen processor with integrated graphics.
What expansion slots are available for adding components?
The board offers three PCI Express expansion slots: one PCIe x16 slot for graphics cards and two PCIe x1 slots for additional expansion cards such as sound cards, network adapters, or USB controllers. This configuration provides adequate expansion capability for most mainstream builds while maintaining the compact Micro ATX form factor.
| Qty | Price | Available |
|---|
