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Ryzen 5, Ryzen 3 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
$140.57
Special order — estimated available by September 10, 2026.
Genuine GIGABYTE Technology through authorized distribution — TAA country-of-origin verified and NDAA §889 screened before checkout.
AMD B550 Gaming Motherboard with 10+3 Phases Digital Twin Power Design, PCIe 4.0 x16 Slot, Dual PCIe 4.0/3.0 x4 M.2, GbE LAN with Bandwidth Management, Front USB Type-C, RGB FUSION 2.0, Q-Flash Plus
• Supports AMD Ryzen 5000 Series/ Ryzen 5000 G-Series/ Ryzen 4000 G-Series and Ryzen 3000 Series Processors
• Dual Channel ECC/ Non-ECC Unbuffered DDR4, 4 DIMMs
• 10+3 Phases Digital Twin Power Design with Low RDS(on) MOSFETs
• Ultra Durable PCIe 4.0 Ready x16 Slot
• Dual Ultra-Fast NVMe PCIe 4.0/3.0 x4 M.2 Connectors
• GbE LAN with Bandwidth Management
• Front USB 3.2 Gen1 Type-C and HDMI
• High Quality Audio Capacitors and Audio Noise Guard for Ultimate Audio Quality
• RGB FUSION 2.0 support Addressable LED & RGB LED Strips
• Smart Fan 5 Features Multiple Temperature Sensors , Hybrid Fan Headers with FAN STOP
• Q-Flash Plus Update BIOS without Installing the CPU, Memory and Graphics Card
GIGABYTE B550 motherboards maximize your PC's potential with AMD StoreMI technology. StoreMI accelerates traditional storage devices to reduce boot times and enhance the overall user experience. This easy-to-use utility combines the speed of SSDs with the high capacity of HDDs into a single drive, enhances the read/write speeds of the device to match that of SSDs, bolsters data performance for incredible value, and transforms the everyday PC to a performance driven system.
The benefits of AMD StoreMI:
• Making the PC experience fast, smooth and easy
• Optimizing computer responsiveness from system boot to application launch
• Offering SSD performance with HDD capacity at an affordable cost
• Quickly accessing key files by automatically learning users' computing behaviors
PERFORMANCE
10+3 Phases Pure Digital VRM Solution with Low RDS(on) MOSFETs
Benefits of Low RDS(on) MOSFETs
• Optimized gate charge to minimize switching losses.
• Lower temperature, smaller size, better thermal characteristics.
GIGABYTE UD series motherboards use a 10+3 phases pure digital PWM + Low RDS(on) MOSFETs design to support the 3rd Gen AMD Ryzen CPUs by offering incredible precision in delivering power to the motherboard's most power-hungry and energy-sensitive components as well as delivering enhanced system performance and ultimate hardware scalability.
PCIe 4.0 Slot
PCIe 4.0 x16 slot with faster bandwidth and lower impedance.
| Audio | |
|---|---|
| Audio Channels | 7.1 |
| General Information | |
| Manufacturer | GIGABYTE Technology, Inc |
| Manufacturer Part Number | B550UDAC |
| Brand Name | GIGABYTE |
| Product Line | Ultra Durable |
| Product Model | B550 UD AC |
| Product Name | Desktop Motherboard |
| Product Type | Desktop Motherboard |
| I/O Controller | |
| Controller Type | Serial ATA/600 |
| RAID Supported | Yes |
| RAID Levels | 0, 1, 10 |
| I/O Expansions | |
| Total Number of Expansion Slots | 5 |
| Total Number of PCI Express Slots | 5 |
| Number of PCI Express x1 Slots | 4 |
| PCI Express Standard | PCI Express 4.0, PCI Express 3.0 |
| Number of PCI Express x16 Slots | 1 |
| Interfaces/Ports | |
| Total Number of USB Ports | 7 |
| Number of USB 2.0 Ports | 4 |
| Number of USB 3.2 Gen 1 Ports | 2 |
| Number of USB 3.2 Gen 2 Type-A Ports | 1 |
| HDMI | 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 | 4733 MHz, 4600 MHz, 4400 MHz, 4266 MHz, 4133 MHz, 4000 MHz, 3866 MHz, 3733 MHz, 3600 MHz, 3466 MHz, 3400 MHz, 3200 MHz, 2933 MHz, 2667 MHz, 2400 MHz, 2133 MHz |
| Memory Technology | DDR4 SDRAM |
| Network & Communication | |
| Bluetooth | Yes |
| Bluetooth Standard | Bluetooth 4.2 |
| 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 | 7 |
| Number of Onboard USB 2.0 Ports | 4 |
| Physical Characteristics | |
| Form Factor | ATX |
| Width | 12" |
| Depth | 9.6" |
| Processor & Chipset | |
| Chipset Manufacturer | AMD |
| Chipset Model | B550 |
| Total Processor Supported | 1 |
| Processor Socket | Socket AM4 |
| Processor Supported | Ryzen 5, Ryzen 3 |
| Video | |
| Onboard Video | CPU Dependent Video |
Matched on 100 GB–200 GB · 5–10
$696.96
Back-ordered$213.10
Back-ordered$185.28
Back-ordered$145.59
Back-ordered$235.00
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