| Model | B550 UD AC | 
| Manufacturer | GIGABYTE | 
| Chipset | AMD B550 | 
| Form Factor | ATX | 
| CPU Socket Type | AM4 | 
| Supported CPU Series | AMD Ryzen 5000, 5000G, 4000G, 3000, and 3000G Series | 
| Maximum Supported Memory | 128 GB | 
| Memory Technology | Dual Channel DDR4 | 
| Memory Types Supported | ECC and Non-ECC Unbuffered DIMM | 
| Number of Memory Slots | 4 x DIMM | 
| Power Requirements | 24-pin ATX main power connector, 8-pin ATX 12V power connector | 
| UPC | 889523035313 | 
GIGABYTE B550 UD AC ATX Motherboard, AMD B550 Chipset
 
 

Key Benefits
 
            
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- Wide processor compatibility across multiple Ryzen generations ensures long-term upgradeability
- Supports up to 128GB high-speed DDR4 memory with ECC/Non-ECC options for versatility in professional or personal builds
- Integrated HDMI, PCIe x16 slot, and extensive I/O give it outstanding value for gaming or media builds
Product Overview
The GIGABYTE B550 UD AC is a high-performance ATX motherboard engineered for advanced AMD desktop computing. Built on the AMD B550 chipset, it supports a wide array of AMD Ryzen processors through the Socket AM4 interface. It accommodates up to 128GB of Dual Channel DDR4 memory, including both ECC and non-ECC options, for exceptional performance and reliability.
With connectivity essentials such as a PCIe x16 slot, HDMI video interface, multiple USB ports, RJ-45 Ethernet, and SMA antenna connectors, this board is well-equipped for diverse applications. Its ATX form factor (30.5 cm x 24.4 cm) ensures seamless integration into standard PC cases, making it an optimal choice for gaming and professional builds alike.
Specifications
                      Product Overview
                      
                    
                    
                      Wireless Features
                      
                    
                    | Wireless Standard | Wi-Fi 5 (802.11ac) | 
| Bluetooth Version | Bluetooth 4.2 | 
| Antenna Connectors | 2 x SMA connectors (for Wi-Fi/Bluetooth antenna) | 
                      Compliance & Origin
                      
                    
                    | Country of Origin | China | 
| Compliance Standards | RoHS, CE, FCC | 
| Certifications | ErP Ready, Energy Star | 
                      Advanced Security Features
                      
                    
                    | Trusted Platform Module (TPM) | TPM header onboard (for discrete TPM module) | 
| Secure Boot | Yes | 
| Platform Trust Technology (PTT) | Yes | 
                      Interfaces
                      
                    
                    | Expansion Slots | 1 x PCIe 4.0 x16, 2 x PCIe 3.0 x1, 1 x PCIe 3.0 x16 (x4 mode) | 
| M.2 Slots | 2 x M.2 connectors (1 with PCIe 4.0 x4, 1 with PCIe 3.0 x2 & SATA support) | 
| SATA Ports | 4 x SATA 6Gb/s connectors | 
| USB Ports (Rear) | 1 x USB 3.2 Gen 2 Type-C, 1 x USB 3.2 Gen 2 Type-A, 4 x USB 3.2 Gen 1, 4 x USB 2.0 | 
| USB Ports (Internal Headers) | 2 x USB 3.2 Gen 1 headers, 2 x USB 2.0 headers | 
| LAN Port | 1 x RJ-45 (Realtek GbE LAN) | 
| Audio Jacks | 3 x Audio jacks (Mic-in, Line-out, Line-in) | 
| Video Output | 1 x HDMI 2.1 port (max resolution 4096x2160@60Hz) | 
                      Physical & Environmental
                      
                    
                    | Width | 30.5 cm | 
| Depth | 24.4 cm | 
| Motherboard Dimensions | 12.0" x 9.6" | 
| Operating Temperature | 0°C to 80°C | 
| Storage Temperature | -40°C to 85°C | 
| Humidity (Operating) | 10% to 90% non-condensing | 
                      Cloud Management & Licensing
                      
                    
                    | BIOS Management | UEFI AMI BIOS | 
| BIOS Features | Q-Flash Plus, Secure Boot, Platform Trust Technology (PTT) | 
| Firmware Update Method | USB BIOS Flashback (Q-Flash Plus) | 
| Cloud Management | |
| Software Utilities | GIGABYTE APP Center, EasyTune, @BIOS | 
 
               
     
    