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Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9, Ryzen 5 Pro, Ryzen 7 PRO, Ryzen 9 PRO, Ryzen 3 PRO Processor Supported - 128 GB DDR4 SDRAM Maximum RAM - DIMM, UDIMM - 4 x Memory Slots - Gigabit Ethernet - IEEE 802.11a/b/g/n/ac - HDMI - 4 x SATA Interfaces
$113.79
Special order — estimated available by September 10, 2026.
Genuine ASUS Computer International through authorized distribution — TAA country-of-origin verified and NDAA §889 screened before checkout.
AMD AM4 mATX motherboard with PCIe 4.0, dual M.2, WiFi, HDMI, D-Sub, DVI, SATA 6 Gbps, USB 3.2 Gen 2 ports, Aura Sync RGB lighting
• AMD AM4 socket: Ready for Ryzen? 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors
• Comprehensive cooling: VRM heatsink, PCH heatsink, Fan Xpert 2+
• Ultrafast connectivity: Dual M.2, PCIe 4.0, 802.11ac Wi-Fi, USB 3.2 Gen 2 Type-A
• Aura Sync RGB: Synchronizable LED effects across a vast portfolio of compatible PC gear, including addressable RGB strips
PRIME
ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.
Tune It Your Way
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work - maximizing your productivity.
About ASUS ASUS is a multinational company best known for their motherboards, PCs, monitors, graphics cards and routers. Along with an expanding range of superior gaming, content-creation and AIoT solutions, ASUS leads the industry through cutting-edge design and innovations made to create the most ubiquitous, intelligent, heartfelt and joyful smart life for everyone. With a global workforce that includes more than 5,000 R&D professionals, ASUS is driven to become the world’s most admired innovative leading technology enterprise. About ROG Republic of Gamers (ROG) is an ASUS sub-brand dedicated to creating the world’s best gaming hardware and software. Formed in 2006, ROG offers a complete line of innovative products known for performance and quality, including motherboards, graphics cards, laptops, desktops, monitors, audio equipment, routers and peripherals. ROG participates in and sponsors major international gaming events. ROG gear has been used to set hundreds of overclocking records and it continues to be the preferred choice of gamers and enthusiasts around the world. © 2024 ASUS Computer International. All Rights Reserved. ASUS is a registered trademark of ASUSTeK Computer. All specifications and terms are subject to change without notice. Please check with your supplier for exact offers on selected models. Products may not be available in all markets. Product may not be exactly as shown in photos. Actual colors may differ from their appearance due to variation of monitor restrictions and color processing. All trademarks are registered to their respective companies. ASUS shall not be liable for technical or editorial errors or omissions contained herein.
| Audio | |
|---|---|
| Audio Channels | 7.1 |
| General Information | |
| 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 |
| I/O Controller | |
| Controller Type | Serial ATA/600 |
| RAID Supported | Yes |
| RAID Levels | 0, 10, 1 |
| 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 |
| 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 |
| Network & Communication | |
| Bluetooth | Yes |
| Gigabit Ethernet | Yes |
| Wireless LAN | Yes |
| Wireless LAN Standard | IEEE 802.11a/b/g/n/ac |
| 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 | 9.6" |
| Depth | 9.6" |
| 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 |
| Video | |
| Onboard Video | CPU Dependent Video |
| Miscellaneous | |
| Environmentally Friendly | Yes |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) |
| Country of Origin | China |
Matched on 100 GB–200 GB · 5–10
$327.21
Back-orderedSend a bill of materials or part numbers — we confirm stock, TAA country of origin and a below-market total. No payment up front.
