Product Type | Motherboard |
Form Factor | Micro ATX |
Chipset | AMD B550 |
Processor Socket | Socket AM4 |
Supported Processors | AMD Ryzen 5000 Series, Ryzen 5000 G-Series, Ryzen 4000 G-Series, Ryzen 3000 Series, Ryzen 3000 G-Series |
Maximum Memory Supported | 128 GB |
Memory Type | DDR4 |
ECC Support | Yes (ECC and non-ECC supported) |
Power Requirements | 24-pin ATX main power connector and 8-pin ATX 12V power connector |
Audio | Realtek ALC887 audio codec; High Definition Audio; 2/4/5.1/7.1-channel |
CPU Power Phases | 5+3 Phases Digital VRM Solution |
GIGABYTE B550M K Micro ATX AMD B550 Motherboard, Socket AM4, DDR4, 128GB



Key Benefits

AI-Powered Summaries from Online Customer Reviews
Eye-Insights™ are generated by proprietary AI that analyzes real online customer reviews to highlight top pros and key product features. While we aim for accuracy, insights are provided “as-is” and individual results may vary.
- Broad processor compatibility allows use with multiple generations of Ryzen CPUs for upgrade flexibility.
- High memory capacity with ECC support ensures dependable system performance for multitasking and professional use.
- Compact Micro ATX form factor with full connectivity makes it ideal for building efficient desktop systems in space-limited setups.
Product Overview
The GIGABYTE B550M K motherboard brings performance, stability, and upgradeability to compact computing setups. Built on the AMD B550 chipset and supporting Socket AM4, it is compatible with a wide range of AMD Ryzen processors, including the 5000, 4000 G-Series, and 3000 lines. The board supports up to 128GB of DDR4 memory with both ECC and non-ECC types. This Micro ATX form factor board fits in smaller enclosures, offering flexibility for users seeking compact but powerful configurations.
Equipped with essential connection and expansion options, the B550M K features DisplayPort and HDMI video outputs, a full suite of USB and audio interfaces, and Ethernet networking via RJ-45. The PCI Express x16 slot ensures compatibility with current-generation GPUs or expansion cards, adapting it well for diverse applications, from home office to light gaming or workstation use. The board also includes legacy PS/2 support. With its balanced features and compact design, the B550M K delivers strong value for mainstream PC builders.
Specifications
Product Overview
Wireless Features
Wi-Fi |
Compliance & Origin
Country of Origin | China |
Certifications | CE, FCC, BSMI |
RoHS Compliance | Yes |
Advanced Security Features
TPM Support | Firmware TPM (fTPM) supported with AMD Ryzen processors |
Secure Boot | Yes |
BIOS Password Protection | Yes |
Interfaces
PCIe x16 Slots | 1 x PCI Express 4.0/3.0 x16 slot (depending on processor) |
PCIe x1 Slots | 2 x PCI Express x1 slots |
Video Output | 1 x HDMI, 1 x DisplayPort |
USB Ports (Rear) | 4 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0 |
USB Ports (Internal) | 2 x USB 2.0 headers, 1 x USB 3.2 Gen 1 header |
Audio Jacks | 3 x 3.5mm audio jacks (Line-in, Line-out, Mic-in) |
LAN Ports | 1 x RJ-45 |
PS/2 Ports | 1 (combo port for keyboard/mouse) |
Internal Storage Interfaces | 4 x SATA 6Gb/s ports, 1 x M.2 connector (PCIe 4.0 x4 or PCIe 3.0 x4/SATA) |
LAN Controller | Realtek GbE LAN |
Physical & Environmental
Motherboard Dimensions (W x D) | 24.4 cm x 24.4 cm |
Operating Temperature | 0°C to 85°C (non-condensing) |
Operating Humidity | 10% to 90% RH (non-condensing) |
Cloud Management & Licensing
Remote Management | |
Bundled Software | GIGABYTE APP Center, BIOS, @BIOS, EasyTune, System Information Viewer |
BIOS Type | AMI UEFI BIOS |
BIOS Features | PnP, DMI, WfM, SM BIOS, ACPI, Q-Flash |
Firmware Update Method | Q-Flash (via UEFI BIOS) |