Gigabyte B550M K Ultra Durable AMD AM4 Socket Motherboard, Micro-ATX, 4x DDR4 Slots, 2x M.2 Sockets, GbE LAN, 1x DisplayPort / 1x HDMI Port

GIGABYTE B550M K (rev. 1.1) Micro ATX Motherboard

The GIGABYTE B550M K (rev. 1.1) is a Micro ATX motherboard designed for AMD Ryzen processors, combining high-speed PCIe 4.0 performance, dual ultra-fast M.2 connectivity, enhanced audio, and durable hardware protection features.

Key Features

• CPU Support
• AMD Socket AM4

• Supports:

  • AMD Ryzen 5000 Series
  • AMD Ryzen 5000 G-Series
  • AMD Ryzen 4000 G-Series
  • AMD Ryzen 3000 and Ryzen 3000 G-Series Processors

• Memory

• Dual Channel ECC / Non-ECC Unbuffered DDR4

• 4 DIMM slots, up to 128 GB total

• Graphics & Expansion

• Ultra Durable PCIe 4.0 Ready x16 Slot

• Rear DisplayPort and HDMI for multi-display support

• Storage

• Dual ultra-fast NVMe PCIe 4.0/3.0 M.2 connectors

• Networking

• Realtek GbE LAN with bandwidth management

• Audio

• High quality audio capacitors

• Audio Noise Guard design for improved audio clarity

• Cooling & Control

• Smart Fan 5 with multiple temperature sensors

• Hybrid fan headers with FAN STOP for fan silence

• Reliability & Protection

• Anti-Sulfur resistors design
• Surge and ESD protection
• Glass Fabric PCB for humidity protection
• Low RDS(on) MOSFETs for lower heat and energy efficiency
• Solid pin power connectors
• GIGABYTE patented double locking bracket

Performance

M.2 PCIe 4.0 Slot

• M.2 PCIe 4.0 x4 slot with lower impedance for high-speed SSD performance.

PCIe 4.0 Slot

• PCIe 4.0 x16 slot with faster bandwidth and lower impedance for discrete graphics and add-in cards.

Connectivity

Dual NVMe PCIe 4.0/3.0 M.2 Connectors

• NVMe PCIe 4.0/3.0 x4 and PCIe 3.0 x2 M.2 connectors.
• Supports NVMe or SATA mode connectivity for M.2 SSD devices.
• Delivers up to 64 Gb/s data transfer speed.
• Supports RAID modes for an ideal high-speed storage solution.

GbE LAN with Bandwidth Management

• Realtek GbE LAN with network bandwidth management application.
• Helps improve network latency and maintain low ping times in crowded LAN environments.

HDMI 2.1 & DisplayPort

• HDMI 2.1 with:
• Backward compatibility with HDMI 2.0 / 1.4
• Up to 48 Gb/s bandwidth
• Support for 4K / 60P, 21:9 native cinematic ratio, Full HDR and HDCP 2.3
• DisplayPort output for high-resolution display connectivity.

ESD & Surge Protection

• ICs with up to 3x the ESD resistance of traditional ICs.
• Special anti-surge ICs help protect motherboard and PC from electrical surges.

Cooling – Smart Fan 5

Smart Fan 5 ensures stable performance with advanced cooling control:

• 5 temperature sensors
• 2 fan pin headers
• All fan headers upgraded to hybrid fan headers
• Interoperable fans and sensors
• Intuitive user interface for fan control

FAN STOP

• Customizable fan stop feature:
• Map any fan to stop completely below a chosen temperature threshold.
• Configure which fan stops, based on which sensor, and at what temperature.

Hybrid Fan Pin Headers

• Real-time information on flow-rate and water temperature when using supported cooling.
• Automatically detect fan or pump and support both PWM and Voltage modes.

New Smart Fan 5 Software

• Multiple modes from Quiet to Full Speed.
• Intuitive fan curve configuration with temperature-triggered speed control.

Audio

High-End Audio Capacitors

• High-quality capacitors for high-resolution, high-fidelity audio.
• Delivers realistic sound effects suitable for gaming and multimedia.

Audio Noise Guard

• PCB-level isolation for analog audio components.
• Helps reduce noise interference for cleaner sound output.

Ultra Durable Design

GIGABYTE Patented Double Locking Bracket

• First lock: Inserted from the top for improved retention.
• Second lock: Soldered for a stronger mechanical bond.

Solid Pin Power Connectors

• Solid plated ATX 12V 8-pin power connector.
• Designed to offer stable power supply under CPU overloading.

Advantages: - Larger contact area for electricity - More metal to sustain higher power and heat - Enhanced durability and longer lifespan

Anti-Sulfur Resistors Design

• Resistors with Anti-Sulfur Design help prevent failures caused by sulfurization.
• Improves long-term reliability in harsh environments.

Surge Protection

• Special anti-surge ICs protect against irregular electrical spikes.

Humidity Protection – Glass Fabric PCB

• Glass Fabric PCB reduces spacing between PCB fiber weave.
• Makes moisture penetration more difficult compared to traditional PCBs.
• Offers improved protection against short circuits and system malfunctions caused by humidity.

High Temperature Protection – Low RDS(on) MOSFETs

• Low RDS(on) MOSFETs reduce energy wastage from residual heat.
• Contributes to energy savings without impacting performance.

Specifications

CPU

Chipset

Memory

Onboard Graphics

Audio

LAN

Expansion Slots

Storage

USB

Internal I/O Connectors

• 1 x 24-pin ATX main power connector
• 1 x 8-pin ATX 12V power connector
• 1 x CPU fan header
• 1 x system fan header
• 2 x M.2 Socket 3 connectors
• 4 x SATA 6Gb/s connectors
• 1 x front panel header
• 1 x front panel audio header
• 1 x USB 3.2 Gen 1 header
• 1 x USB 2.0/1.1 header
• 1 x Trusted Platform Module (TPM) header (2x6 pin, for GC-TPM2.0_S module only)
• 1 x Clear CMOS jumper

Back Panel Connectors

• 1 x PS/2 keyboard/mouse port
• 1 x DisplayPort
• 1 x HDMI port
• 4 x USB 3.2 Gen 1 ports
• 4 x USB 2.0/1.1 ports
• 1 x RJ-45 LAN port
• 3 x audio jacks

I/O Controller

• iTE I/O Controller Chip

H/W Monitoring

• Voltage detection
• Temperature detection
• Fan speed detection
• Fan fail warning
• Fan speed control

BIOS

• 1 x 128 Mbit flash
• AMI UEFI BIOS (licensed)
• Supports: PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0

Unique Features

• APP Center support:
• @BIOS
• EasyTune
• Smart Backup
• System Information Viewer
• Support for Q-Flash

Operating System

• Windows 11 64-bit
• Windows 10 64-bit

Form Factor