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GIGABYTE · AM4 · B550M

GIGABYTE B550M K

Micro-ATX · DDR4 · 4 DIMMs · 5-phase VRM

Quality
42
VRM
12
Value
115
Amazon
$70
GIGABYTE B550M K
View GIGABYTE B550M K Gallery in high resolution
$70
Available Updated 2 days, 15 hours ago Prime FBA
Overall42.2
VRM12.0
Chipset75.0
Expansion / storage48.0
Connectivity31.0
Audio45.0
Quality / price114.6
$70 on Amazon Open in PC Builder Motherboard table

Written analysis

GIGABYTE B550M K at a glance

The GIGABYTE B550M K uses the Micro-ATX form factor, AM4 socket, and B550M chipset. This is a balanced mainstream platform: enough expansion and connectivity for a performance PC without paying only for flagship extras.

Memory support is DDR4 across 4 DIMM slots, with up to 128 GB and rated overclocked speeds up to 4733 MT/s. The board can operate memory in ECC mode. XMP / EXPO memory-profile support is recorded for easier tuning.

Best fit: a mainstream gaming, home, or office system with moderate expansion needs.

Power delivery

The calculated VRM score is 12.0, placing the power delivery in the basic class. The board lists 5 CPU power phases, 50 A power stages in a 5+1 layout. CPU power input is listed as 1. Keep it paired with lower-power processors and avoid sustained overclocked loads.

Expansion and storage

The expansion and storage score is 48.0: focused on the essentials. The platform supports PCIe 4.0. Physical expansion includes 1 ×16 slot, and 1 ×1.

On-board storage consists of 2 M.2 slots and 4 SATA ports. Supported M.2 lengths are listed as 2280. The two-slot layout covers a typical OS-and-games or OS-and-project-drive setup.

Connectivity and rear I/O

The connectivity score is 31.0, rated essential. There is no recorded onboard Wi-Fi ; wired networking is Realtek® GbE LAN chip (1 Gbps/100 Mbps/10 Mbps) at up to 1000 Mbps. The recorded USB provision is 8 rear connections; a front-panel total is not recorded. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1, DisplayPort 1.4. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 45.0. This is a standard onboard solution using Realtek® ALC892/ALC897. It covers normal gaming and communication; demanding headphones or production work still benefit from an external interface. The rear panel has 3 analogue jacks.

Buying verdict

Overall quality is 42.20, a basic but usable result for office, media, and budget gaming systems.

At the recorded Amazon price, the quality-to-price score is 114.6—an excellent value relative to the other boards in the catalog.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
GIGABYTE
Motherboard
GIGABYTE B550M K
Chipset / socket
B550M / AM4
Form factor
Micro-ATX
Launch price
—
Amazon price
$70
Availability
In stock
Price updated
2 days, 15 hours ago

VRM

CPU phases
5 (50 A)
Power design
5+1
EPS connector
1

Memory

Type / slots
DDR4 / 4 DIMMs
Max capacity / OC
128 GB / 4733 MT/s
Per DIMM
32 GB
XMP / EXPO
Yes
ECC
Operates in ECC mode

PCIe

Supported version
PCIe 4.0
x16 physical
1
x16 Gen 4
1
x1 physical
1
x1 Gen 3
1

Storage

M.2 slots
2
M.2 lengths
2280
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4096x2160@60 Hz
DisplayPort
Yes · 1.4 · 5120x2880@60 Hz
USB-C DisplayPort
No

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
4
Header USB 2.0
2
Header USB 3.2 Gen 1 Type-A 5 Gbps
2

Networking

Ethernet
Realtek® GbE LAN chip (1 Gbps/100 Mbps/10 Mbps)
LAN ports
1
LAN speed
1000 Mbps
Wi-Fi
Not included
Bluetooth
No

Audio

Chipset
Realtek® ALC892/ALC897
Analog jacks
3
Gold-plated jacks
No
Optical S/PDIF
No
Spatial audio
Rear output

Additional information

Memory notes
Supports DDR4 speeds: 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. ECC memory (ECC mode) support varies by CPU. Supports ECC Un-buffered DIMM 1Rx8/2Rx8 and non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 modules. The CPU and memory configuration may affect the supported memory types, data rate, and number of DRAM modules.
Display notes
Integrated Graphics Processor with AMD Radeon™ Graphics support. Both DisplayPort and HDMI outputs support HDCP 2.3 and HDR. Maximum shared memory of 16 GB.
Expansion notes
The PCI Express x16 slot supports PCIe 4.0 x16 mode with AMD Ryzen™ 5000/3000 Series Processors, but runs in PCIe 3.0 x16 mode with AMD Ryzen™ 5000 G-Series/4000 G-Series/3000 G-Series Processors. The PCI Express x1 slot supports PCIe 3.0 x1 mode.
M2A_CPU
4.0 4 · SATA · 2280 · CPU — The supported interface (SATA and PCIe 4.0 x4/x2 or SATA and PCIe 3.0 x4/x2) depends on the installed CPU. AMD Ryzen™ 5000/3000 Series support PCIe 4.0, while Ryzen™ 5000 G/4000 G/3000 G-Series processors support PCIe 3.0.
M2B_SB
3.0 2 · 2280 · Chipset
RAID
SATA (0, 1, 10)
Storage notes
SATA connectors support 6Gb/s speed.
USB notes
USB 2.0 ports are also compatible with USB 1.1.
Audio notes
High Definition Audio. Supports 2/4/5.1/7.1-channel audio. The functionality of an audio jack can be changed using the audio software to configure 7.1-channel audio.
Button notes
The motherboard includes a Clear CMOS jumper.
Fan / RGB headers
1 CPU · — OPT · — AIO · 1 chassis · — ARGB · — RGB
Other headers
Front audio · System panel · TPM
Dimensions
24.4cm x 24.4cm

Extracted notes sit here. Official manufacturer copy is at the bottom of the page.

Amazon

Price history

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Vendor copy

Official manufacturer data

Raw manufacturer text kept for reference. Structured specs above are extracted from this copy and are the source for scores and tables.

Memory

4 x DDR4 DIMM sockets supporting up to 128 GB (32 GB single DIMM capacity) of system memory
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
Dual channel memory architecture
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
Support for Extreme Memory Profile (XMP) memory modules
(The CPU and memory configuration may affect the supported memory types, data rate (speed), and number of DRAM modules, please refer to "Memory Support List" on GIGABYTE's website for more information.)

Graphics

Integrated Graphics Processor with AMD Radeon™ Graphics support:
1 x DisplayPort, supporting a maximum resolution of 5120x2880@60 Hz
* Support for DisplayPort 1.4 version, HDCP 2.3, and HDR.
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

Expansion slots

1 x PCI Express x16 slot, integrated in the CPU:
AMD Ryzen™ 5000 Series*/3000 Series Processors support PCIe 4.0 x16 mode
* Actual support may vary by AMD CPU's specification.
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:
Supporting PCIe 3.0 x1 mode

Storage

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/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:
Supporting PCIe 3.0 x2 SSDs
4 x SATA 6Gb/s connectors, integrated in the Chipset:
Support for RAID 0, RAID 1, and RAID 10

USB

CPU:
4 x USB 3.2 Gen 1 ports on the back panel
Chipset:
2 x USB 3.2 Gen 1 ports available through the internal USB header
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

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 the GC-TPM2.0_S module only)
1 x Clear CMOS jumper

Rear I/O

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

Audio

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.

Special 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