Gigabyte B550 UD AC – 1.2 – motherboard – ATX – Socket AM4 – AMD B550 Chipset – USB 3.2 Gen 1, USB 3.2 Gen 2, USB-C 3.2 Gen 1 – Gigabit LAN, Wi-Fi, Bluetooth – onboard graphics (CPU required) – HD Audio (8-channel)

Part Number:B550 UD AC
Warranty:3 Years

$255.20 inc GST

Free Delivery

50 in stock (can be backordered)

Ships from Auckland or Christchurch

Ships from Auckland or Christchurch

  • Allow 1-2 days for delivery
  • add 1-2 days if you are rural
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The Gigabyte B550 UD AC motherboard combines advanced technology with robust build quality to deliver a high-quality computing experience. Designed for enthusiasts and professionals alike, it supports Ryzen processors, offering a versatile foundation for building a high-performance PC. With dual M.2 slots that support the PCIe 4.0 standard, users can enjoy fast storage speeds, reducing load times and enhancing overall system responsiveness. The motherboard’s 10+3 phase power design ensures stable power delivery to the CPU, even under heavy loads, while its comprehensive cooling solutions, including Smart Fan 5 technology, keep temperatures in check for optimal performance. Additionally, with support for up to 4733 MHz (O.C.) DDR4 RAM, the Gigabyte B550 UD AC allows for smooth multitasking and quick access to frequently used files and programs. High-speed connectivity options, including Bluetooth 5.0 and Wi-Fi 802.11a/b/g/n/ac, ensure you’re always connected, whether you’re gaming online, streaming, or transferring large files. Whether you’re building a gaming rig, a content creation workstation, or a powerful home computer, the Gigabyte B550 UD AC motherboard is engineered to meet high expectations.

  • Supports Ryzen 3000, 4000 G-Series, and 5000 Series processors for versatile CPU compatibility
  • Dual M.2 slots with PCIe 4.0 support for high-speed storage solutions
  • 10+3 phase power design for enhanced system stability and power efficiency
  • Up to 4733 MHz (O.C.) DDR4 support for superior multitasking and system speed
  • Integrated Bluetooth 5.0 and 802.11a/b/g/n/ac Wi-Fi for high-speed wireless connectivity

  • Enhanced connectivity
    With dual M.2 interfaces and support for PCIe 4.0, the Gigabyte B550 UD AC motherboard offers fast data transfer speeds and ample storage options, ensuring your system keeps up with demanding applications and storage needs.
  • Robust power design
    Featuring a 10+3 phase power design and solid pin power connectors, this motherboard is engineered for stability and reliability, providing a solid foundation for high-performance computing.
  • Comprehensive cooling
    GIGABYTE Smart Fan 5 technology allows users to interchange their fan headers to reflect different thermal sensors at different locations on the motherboard. Coupled with high-end audio capacitors, it ensures your system runs cool and stable even under intense workloads, while delivering crisp, immersive sound quality.
  • Advanced memory support
    Supporting up to 4733 MHz (O.C.) DDR4 RAM across 4 DIMM slots, the motherboard enables enhanced multitasking and speed, making it ideal for gamers and professionals looking to maximize their system’s performance.
  • Next-gen networking
    Equipped with Bluetooth 5.0 and 802.11a/b/g/n/ac Wi-Fi, along with Gigabit Ethernet, the motherboard offers a range of high-speed connectivity options for seamless online gaming, streaming, and data communication.

Main Specifications

Product DescriptionGigabyte B550 UD AC – 1.2 – motherboard – ATX – Socket AM4 – AMD B550
Product TypeMotherboard – ATX
Chipset TypeAMD B550
Processor Socket1 x Socket AM4
Compatible ProcessorsRyzen (supports Ryzen 3000 Series/ 3000 G-Series/ 4000 G-Series/ 5000 Series/ 5000 G-Series)
Max RAM Size128 GB
RAM Supported4 DIMM slots – DDR4, non-ECC, ECC (operate in non-ECC mode), unbuffered
Storage Ports4 x SATA-600 (RAID), 2 x M.2
USB / FireWire Ports1 x USB-C 3.2 Gen 1 + 1 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 USB 2.0 via headers)
AudioHD Audio (8-channel)
LANGigabit Ethernet, 802.11a/b/g/n/ac, Bluetooth 5.0

Extended Specifications


Product TypeMotherboard – ATX
Chipset TypeAMD B550
Processor SocketSocket AM4
Max Processors Qty1
Compatible ProcessorsRyzen (supports Ryzen 3000 Series/ 3000 G-Series/ 4000 G-Series/ 5000 Series/ 5000 G-Series)

Supported RAM

Max Size128 GB
Bus Clock2400 MHz, 2133 MHz, 2667 MHz, 2933 MHz, 3400 MHz (O.C.), 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.), 4600 MHz (O.C.), 3200 MHz, 4733 MHz (O.C.)
Supported RAM Integrity CheckNon-ECC, ECC (operate in non-ECC mode)
Registered or BufferedUnbuffered
FeaturesDual channel memory architecture, Intel Extreme Memory Profiles (XMP), supported ECC modules operate in non-ECC mode


TypeHD Audio (8-channel)
Compliant StandardsHigh Definition Audio


Network ControllerRealtek RTL8821CE
Network InterfacesGigabit Ethernet, 802.11a/b/g/n/ac, Bluetooth 5.0

Expansion / Connectivity

Expansion Slots1 x CPU
4 x DIMM 288-pin
1 x PCIe 4.0 x16 (PCIe 4.0 x16 mode (with 3rd Generation Ryzen CPU); PCIe 3.0 x16 mode (with 3nd Generation Ryzen with Radeon Graphics CPU))
1 x PCIe 3.0 x1
Storage InterfacesSATA-600 -connectors: 4 x 7pin Serial ATA – RAID 0 / RAID 1 / RAID 10
SATA-600 / PCIe 3.0 -connectors: 1 x M.2
PCIe 4.0 -connectors: 1 x M.2
Interfaces1 x LAN (Gigabit Ethernet)
4 x USB 2.0
1 x audio line-in – mini-jack
1 x audio line-out – mini-jack
1 x microphone – mini-jack
2 x aerial
1 x HDMI
2 x USB 3.2 Gen 1
USB 3.2 Gen 2
USB-C 3.2 Gen 1
Internal Interfaces4 x USB 2.0 – header
2 x USB 3.2 Gen 1 – header
1 x USB-C 3.2 Gen 1 – header
1 x SPI – header
1 x audio – header
Power Connectors24-pin main power connector, 8-pin ATX12V connector


BIOS FeaturesWfM 2.0 support, UEFI BIOS, SMBIOS 2.7 support, DMI 2.7 support, ACPI 5.0 support, PnP 1.0a support
Hardware MonitoringSystem voltage, water cooling flow rate, fan fail warning, fan control, fan speed detection, temperature detection
Hardware FeaturesUltra Durable, Q-Flash Plus, Anti-Sulfur Design, GIGABYTE Smart Fan 5, 10+3 Phase Power Design, Solid Pin Power Connectors, RGB FUSION 2.0, High-end Audio Capacitors


Software Included@BIOS, EasyTune, GIGABYTE App Center, GIGABYTE Smart Backup, GIGABYTE Control Center, LAN manager, Norton Internet Security (OEM Version)
Compliant StandardsHDCP 2.3
Width30.5 cm
Depth24.4 cm
Package DetailsBox

Additional information


Compatible Socket

Case/Motherboard Form Factor


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Gigabyte B550 UD AC – 1.2 – motherboard – ATX – Socket AM4 – AMD B550
$255.20 inc GST