Model

Brand	GIGABYTE
Model	B550M K

Supported CPU

CPU Socket Type	AM4
CPU Type	Ryzen 3000 Series / Ryzen 4000G Series / Ryzen 5000 Series / Ryzen 5000G Series

Chipsets

Chipset	AMD B550

Memory

Number of Memory Slots	4x288pin (DDR4)
Memory Standard	DDR4 3200
Maximum Memory Supported	128GB
Channel Supported	Dual Channel
ECC Supported	Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules* * ECC memory (ECC mode) support varies by CPU Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Buffer Supported	Un-buffered
Memory Feature	Support for Extreme Memory Profile (XMP) memory modules

Expansion Slots

PCI Express 4.0 x16	1 x PCI Express x16 slot, integrated in the CPU: AMD Ryzen 5000 Series/3000 Series Processors support PCIe 4.0 x16 mode AMD Ryzen 5000 G-Series/4000 G-Series Processors support PCIe 3.0 x16 mode
PCI Express x1	1 x PCI Express x1 slot, integrated in the Chipset: Supporting PCIe 3.0 x1 mode

Storage Devices

SATA 6Gb/s	4 x SATA 6Gb/s
M.2	1 x M.2 connector (M2A_CPU), integrated in the CPU, supporting Socket 3, M key, type 2280 SSDs: AMD Ryzen 5000 Series/3000 Series Processors support SATA and PCIe 4.0 x4/x2 SSDs AMD Ryzen 5000 G-Series/4000 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: Supporting PCIe 3.0 x2 SSDs

Onboard Audio

Audio Channels	Realtek Audio CODEC High Definition Audio 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.

Onboard LAN

LAN Chipset	Realtek GbE LAN chip
Max LAN Speed	1Gbps

Rear Panel Ports

Back I/O Ports	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

Internal I/O Connectors

Onboard USB	1 x USB 3.2 Gen 1 header 1 x USB 2.0/1.1 header
Other Connectors	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 Trusted Platform Module (TPM) header (2x6 pin, for the GC-TPM2.0_S module only) 1 x Clear CMOS jumper

Physical Spec

Form Factor	Micro ATX
Dimensions (W x L)	9.6" x 9.6"
Power Pin	1 x 24-pin ATX main power connector 1 x 8-pin ATX 12V power connector

Windows 11 Compatibility

Windows 11	Supported

Features

Features	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 Support for Q-Flash Support for Xpress Install