B550M K (rev. 1.1)

Key Features

• Supports AMD Ryzen 5000 Series/ Ryzen 5000 G-Series/ Ryzen 4000 G-Series and Ryzen 3000 and Ryzen 3000 G-Series Processors
• Dual Channel ECC/ Non-ECC Unbuffered DDR4, 4 DIMMs
• Ultra Durable PCIe 4.0 Ready x16 Slot
• Dual Ultra-Fast NVMe PCIe 4.0/3.0 M.2 Connectors
• High Quality Audio Capacitors and Audio Noise Guard for Ultimate Audio Quality
• GbE LAN with Bandwidth Management
• Rear DisplayPort and HDMI for Multi-display Support
• Smart Fan 5 Features Multiple Temperature Sensors, Hybrid Fan Headers with FAN STOPAnti-Sulfur Resistors Design

CONNECTIVITY

With NVMe PCIe 4.0/3.0 x4 and PCIe 3.0 x2 M.2 connectors onboard, GIGABYTE Motherboards bring users to experience NVMe mode or SATA mode connectivity for M.2 SSD devices. Delivering up to 64 Gb/s data transfer speed, the dual M.2 connectors design provides an ideal storage solution while also supporting in RAID modes.

GbE LAN with Bandwidth Management

GbE LAN features a network bandwidth management application which helps to improve network latency and maintain low ping times to deliver better responsiveness in crowded LAN environments.

HDMI 2.1 for 4K / 60P / 21:9 / HDCP 2.3 Support

HDMI 2.1, which is backwards compatible with HDMI 2.0/ 1.4 and offering 48 Gb/s of bandwidth twice times more than previous generation. This unlocks the potential for users to transfer multiple video streams, as well as a native cinematic 21:9 ratio (which most movies are shot in), Full HDR and HDCP 2.3 support, to offer the best visual experience for viewers.

The Industry’s Leading LAN Static-Electricity & Surge Protection

GIGABYTE motherboards use ICs with up to 3 times the ESD resistance levels compared to traditional ICs. This helps to better protect the motherboard and its components against potential damage caused by static electricity. GIGABYTE motherboards also feature special anti-surge ICs that protect your motherboard, and your PC from any surge in power delivery that may occur, helping to ensure that your PC is equipped to deal with any potentially irregular and inconsistent power delivery.

COOLING

Smart Fan 5

With Smart Fan 5 users can ensure that their gaming PC can maintain its performance while staying cool. Smart Fan 5 allows users to interchange their fan headers to reflect different thermal sensors at different locations on the motherboard. Not only that, with Smart Fan 5 more hybrid fan headers that support both PWM and Voltage mode fans have been introduced to make the motherboard more liquid cooling friendly.

• 5 Temperature Sensors
• 2 Fan Pin Headers
• All Fan Pin Headers Upgraded to Hybrid Fan Headers
• Interoperable Fans and Sensors
• Intuitive UI for Fan Control

FAN STOP

Achieve fan silence. With Fan Stop, map any fan to stop completely when temperatures drop below a specified threshold. Which fan stops, based on readings from which sensor, and at what temperatureall of it can be customized to your liking.

Hybrid Fan Pin Headers

Assume complete control over your liquid cooling setup! Smart Fan 5 receives up-to-the-second information on flow-rate and water-temperature through the Hybrid Fan Pin Headers or external thermistor sensorsgiving you absolute mastery over your PC.All Hybrid Fan Headers can automatically detect the type of cooling device whether it be fan or pump with different PWM or Voltage mode.

New Smart Fan 5 Software

Choose from different modes, Quiet to Full Speed, to match your system usage preferences.For each fan or pump, you can use the intuitive fan curve to define trigger thresholds and corresponding fan speeds.

High-End Audio Capacitors

GIGABYTE motherboards use high-end audio capacitors. These high quality capacitors help deliver high resolution and high fidelity audio to provide the most realistic sound effects for gamers.

Audio Noise Guard

GIGABYTE motherboards feature an audio noise guard that essentially separates the board’s sensitive analog audio components from potential noise pollution at the PCB level.

Solid Pin Power Connectors

• B550 motherboards feature solid plated ATX 12V 8pin power connectors for offering stable power supply while CPU overloading.
• Solid Pin Power connector advantages
• Larger contact area for electricity
• More metal quantity to sustain higher power and generated heat
• Ultra durable and longer lifespan

START SULFURIZATION PROTECTION

Sulfur compounds in the air can penetrate tiny onboard resistors creating chemical change and causing these resistors to open or short. If either of these occurs the motherboard will fail to function. By equipping resistors with an Anti-Sulfur Design GIGABYTE gives Ultra Durable Motherboards a whole new meaning.

The Industry’s Leading Surge Protection

GIGABYTE motherboards also feature special anti-surge IC that protect your motherboard, helping to ensure that your PC is equipped to deal with any potentially irregular electrical spikes.

Humidity Protection Glass Fabric PCB

There is nothing more harmful to the longevity of your PC than moisture, and most parts of the world experience moisture in the air as humidity at some point during the year. GIGABYTE motherboards have been designed to make sure that humidity is never an issue, incorporating a new Glass Fabric PCB technology that repels moisture caused by humid and damp conditions. Glass Fabric PCB technology uses a new PCB material which reduces the amount of space between the fiber weave, making it much more difficult for moisture to penetrate compared to traditional motherboard PCBs. This offers much better protection from short circuit and system malfunction caused by humid and damp conditions.

High Temperature Protection Lower RDS(on) MOSFETs Design

GIGABYTE motherboards use Low RDS(on) MOSFETs which reduce energy wastage through unnecessary residual heat dissipation. This all amounts to tangible energy savings which are beneficial for both end-users and the environment without impacting system performance.

Specifications:

• CPU:

  • AMD Socket AM4, support for:
    • AMD Ryzen 5000 Series
    • Ryzen 5000 G-Series
    • Ryzen 4000 G-Series
    • Ryzen 3000 Series
    • Ryzen 3000 G-Series Processors

• Chipset:

  • AMD B550

• Memory:

  • 4 x DDR4 DIMM sockets
    • Support up to 128 GB (32 GB per DIMM)
  • Memory speed support:
    • DDR4 4733(O.C.) / 4600(O.C.) / 4400(O.C.) / 4266(O.C.) / 4133(O.C.) / 4000(O.C.) / 3866(O.C.) / 3733(O.C.) / 3600(O.C.) / 3466(O.C.) / 3400(O.C.) / 3200 / 2933 / 2667 / 2400 / 2133 MHz
  • Dual channel memory architecture
  • Supports ECC and non-ECC Un-buffered DIMM memory
    • ECC Un-buffered DIMM 1Rx8/2Rx8
    • Non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16
  • Supports Extreme Memory Profile (XMP) memory modules

• Onboard Graphics:

  • Integrated Graphics Processor with AMD Radeon Graphics support
    • 1 x DisplayPort (up to 5120×2880@60 Hz)
    • 1 x HDMI (up to 4096×2160@60 Hz)

• Audio:

  • Realtek Audio CODEC
  • High Definition Audio
  • 2/4/5.1/7.1-channel audio support

• LAN:

  • Realtek GbE LAN chip (1 Gbps / 100 Mbps / 10 Mbps)

• Expansion Slots:

  • 1 x PCI Express x16 slot (integrated in the CPU)
    • AMD Ryzen 5000/3000 Series: PCIe 4.0 x16
    • AMD Ryzen 5000 G-Series/4000 G-Series/3000 G-Series: PCIe 3.0 x16
  • 1 x PCI Express x1 slot (integrated in the Chipset)
    • PCIe 3.0 x1 mode

• Storage Interface:

  • 1 x M.2 connector (M2A_CPU)
    • Integrated in CPU, supports Socket 3, M key, type 2280 SSDs
    • AMD Ryzen 5000/3000 Series: SATA and PCIe 4.0 x4/x2 SSDs
    • AMD Ryzen 5000 G-Series/4000 G-Series/3000 G-Series: SATA and PCIe 3.0 x4/x2 SSDs
  • 1 x M.2 connector (M2B_SB)
    • Integrated in Chipset, supports PCIe 3.0 x2 SSDs
  • 4 x SATA 6Gb/s connectors
    • Supports RAID 0, RAID 1, and RAID 10

• USB:

  • CPU:
    • 4 x USB 3.2 Gen 1 ports (back panel)
  • Chipset:
    • 2 x USB 3.2 Gen 1 ports (internal USB header)
    • 6 x USB 2.0/1.1 ports
      • 4 x USB 2.0/1.1 ports (back panel)
      • 2 x USB 2.0/1.1 ports (internal USB header)

• 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 TPM header (for GC-TPM2.0_S module)
  • 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 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
  • PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0

• Unique Features:

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

• Operating System:

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

• Form Factor:

  • Micro ATX
  • Dimensions: 24.4 cm x 24.4 cm