GA-B550M-K

Overview

Gigabyte B550M K Motherboard for AMD Ryzen 5000 Series
The Gigabyte B550M K motherboard delivers high-performance and reliable support for AMD Ryzen 5000 series processors. Designed with the AMD B550 chipset, it offers flexible connectivity, ultra-fast storage options, and advanced cooling technology, making it an ideal choice for gamers, content creators, and PC enthusiasts.

Description

This motherboard supports AMD Ryzen 5000, 4000 G-Series, and 3000 series processors, providing dual-channel DDR4 memory support across four DIMM slots. It features PCIe 4.0 x16 and dual M.2 connectors for high-speed NVMe storage, multiple USB 3.2 and 2.0 ports, and HDMI/DisplayPort outputs for multi-display setups. Integrated GbE LAN with bandwidth management, high-quality audio capacitors, and Smart Fan 5 with FAN STOP technology ensure reliable performance, superior cooling, and immersive sound quality. Anti-sulfur resistors, surge protection, and humidity-resistant PCB design add extra durability and longevity.

Features

Processor and Memory Support

• Compatible with AMD Ryzen 5000/5000 G-Series, 4000 G-Series, and 3000 series processors
• Supports dual-channel ECC and non-ECC DDR4 memory
• Four DIMM slots for up to high-capacity memory

High-Speed Expansion

• Ultra-durable PCIe 4.0 x16 slot for graphics cards
• Dual M.2 slots supporting NVMe PCIe 4.0/3.0 SSDs
• Four SATA 6Gb/s connectors for additional storage devices
• Flexible PCIe expansion with one PCIe x1 slot

Connectivity Options

• HDMI 2.1 and DisplayPort for multi-display support, 4K/60P, and 21:9 cinematic aspect ratios
• USB 3.2 Gen 1 and USB 2.0 ports for peripherals
• GbE LAN with bandwidth management for low-latency networking
• PS/2 port and 3 audio jacks for legacy and high-quality audio connections

Superior Cooling Technology

• Smart Fan 5 with hybrid fan headers for PWM or voltage fans
• Five temperature sensors for precise thermal monitoring
• FAN STOP feature for completely silent operation under low temperatures
• Optimized for liquid cooling setups

Audio Performance

• High-end audio capacitors for high-fidelity sound
• Audio Noise Guard isolates analog audio components to reduce interference
• Ideal for gaming and media creation

Durability and Protection

• Solid pin power connectors for stable CPU power delivery
• Anti-sulfur resistors prevent damage from airborne sulfur compounds
• Industry-leading surge and static electricity protection
• Humidity-resistant Glass Fabric PCB prevents short circuits in damp environments

Additional Highlights

• Dual M.2 slots support RAID configurations for enhanced storage performance
• PCIe 4.0 slots provide lower impedance and higher bandwidth
• Rear I/O designed for easy setup and multiple display options
• Ultra-durable construction ensures long-lasting reliability

Specifications

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Specifications and features
Product Code	GA-B550M-K
CPU	1. AMD Socket AM4, support for: AMD Ryzen 5000 Series/ Ryzen 5000 G-Series/ Ryzen 4000 G-Series and Ryzen 3000 and Ryzen 3000 G-Series Processors
Chipset	1. AMD B550
Memory	1. 4 x DDR4 DIMM sockets supporting up to 128 GB (32 GB single DIMM capacity) of system memory
	2. Support for 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 memory modules
	3. Dual channel memory architecture
	4. Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules
	* ECC memory (ECC mode) support varies by CPU
	5. Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
	6. Support for Extreme Memory Profile (XMP) memory modules
Onboard Graphics	Integrated Graphics Processor with AMD Radeon Graphics support:
	1. 1 x DisplayPort, supporting a maximum resolution of 5120x2880@60 Hz
	* Support for DisplayPort 1.4 version, HDCP 2.3, and HDR.
	2. 1 x HDMI port, supporting a maximum resolution of 4096x2160@60 Hz
	* Support for HDMI 2.1 version, HDCP 2.3, and HDR.
	Maximum shared memory of 16 GB
Audio	1. Realtek Audio CODEC
	2. High Definition Audio
	3. 2/4/5.1/7.1-channel
	* You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings.
LAN	1. Realtek GbE LAN chip (1 Gbps/100 Mbps/10 Mbps)
Expansion Slots	1 x PCI Express x16 slot, integrated in the CPU:
	1. AMD Ryzen 5000 Series*/3000 Series Processors support PCIe 4.0 x16 mode
	* Actual support may vary by AMD CPU's specification.
	2. AMD Ryzen 5000 G-Series/4000 G-Series/3000 G-Series Processors support PCIe 3.0 x16 mode
	1 x PCI Express x1 slot, integrated in the Chipset:
	1. Supporting PCIe 3.0 x1 mode
Storage Interface	1 x M.2 connector (M2A_CPU), integrated in the CPU, supporting Socket 3, M key, type 2280 SSDs:
	1. AMD Ryzen 5000 Series/3000 Series Processors support SATA and PCIe 4.0 x4/x2 SSDs
	2. AMD Ryzen 5000 G-Series/4000 G-Series/3000 G-Series Processors support SATA and PCIe 3.0 x4/x2 SSDs
	1 x M.2 connector (M2B_SB), integrated in the Chipset, supporting Socket 3, M key, type 2280 SSDs:
	1. Supporting PCIe 3.0 x2 SSDs
	4 x SATA 6Gb/s connectors, integrated in the Chipset:
	1. Support for RAID 0, RAID 1, and RAID 10
USB	CPU:
	1. 4 x USB 3.2 Gen 1 ports on the back panel
	Chipset:
	1. 2 x USB 3.2 Gen 1 ports available through the internal USB header
	2. 6 x USB 2.0/1.1 ports (4 ports on the back panel, 2 ports available through the internal USB header)
Internal I/O Connectors	1. 1 x 24-pin ATX main power connector
	2. 1 x 8-pin ATX 12V power connector
	3. 1 x CPU fan header
	4. 1 x system fan header
	5. 2 x M.2 Socket 3 connectors
	6. 4 x SATA 6Gb/s connectors
	7. 1 x front panel header
	8. 1 x front panel audio header
	9. 1 x USB 3.2 Gen 1 header
	10. 1 x USB 2.0/1.1 header
	11. 1 x Trusted Platform Module (TPM) header (2x6 pin, for the GC-TPM2.0_S module only)
	12. 1 x Clear CMOS jumper
Back Panel Connectors	1. 1 x PS/2 keyboard/mouse port
	2. 1 x DisplayPort
	3. 1 x HDMI port
	4. 4 x USB 3.2 Gen 1 ports
	5. 4 x USB 2.0/1.1 ports
	6. 1 x RJ-45 port
	7. 3 x audio jacks
I/O Controller	1. iTE I/O Controller Chip
H/W Monitoring	1. Voltage detection
	2. Temperature detection
	3. Fan speed detection
	4. Fan fail warning
	5. Fan speed control
	* Whether the fan speed control function is supported will depend on the cooler you install.
BIOS	1. 1 x 128 Mbit flash
	2. Use of licensed AMI UEFI BIOS
	3. PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Unique Features	1. Support for APP Center
	* Available applications in APP Center may vary by motherboard model. Supported functions of each application may also vary depending on motherboard specifications.
	@BIOS
	EasyTune
	Smart Backup
	System Information Viewer
	2. Support for Q-Flash
Bundled Software	1. Norton Internet Security (OEM version)
	2. LAN bandwidth management software
Operating System	1. Support for Windows 11 64-bit
	2. Support for Windows 10 64-bit
Form Factor	1. Micro ATX Form Factor , 24.4cm x 24.4cm
Remark	1. Due to different Linux support condition provided by chipset vendors, please download Linux driver from chipset vendors' website or 3rd party website.
	2. Most hardware/software vendors may no longer offer drivers to support Win9X/ME/2000/XP. If drivers are available from the vendors, we will update them on the GIGABYTE website.