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GIGABYTE B550M K

GIGABYTEMainstream motherboard

B550M K

Released February 2023.7Spec databasegeizhals.at/gigabyte-b550m-k-a2901610.htmlRead 15 October 2026Gelistet seit 21.02.2023. This is the first retail listing, so the month is approximate. BuildCores gives the release year 2023. Last checked 15 October 2026.

CPU socket
AM4
Chipset
AMD B550
Form factor
Micro-ATX
M.2 slots
2

49 of 78 fields known.

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At a glance

Ports

  • 4 USB-A USB 3.2 Gen 1
  • 4 USB-A USB 2.0
  • DisplayPort 1.4
  • HDMI 2.1
  • Ethernet (RJ45)
  • 3 3.5 mm audio
  • PS/2
  • USB 3 header (19-pin)
  • USB 2.0 header (9-pin)

All specs

SourceCalculated

General

Series
Not available
Model numbers
B550M K1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The manual cover names the model B550M K. The product page lists revisions 1.0, 1.1 and 1.2 under the same name.
GTIN / EAN
4719331852764, 8895230360064Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026Product data sheet for the part B550M K, publication date 24-SEP-2024, barcodes 4719331852764 and 889523036006. Amazon and BuildCores list the same UPC, and several retailers list the same EAN.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026Item details: UPC 889523036006.8Spec databasebuildcores.com/products/Motherboard/x8q2g3bog/Gigabyte-B550M-K-AM4-DDR4-Micro-ATXRead 15 October 2026UPC 889523036006 and EAN 4719331852764. BuildCores also lists EANs 4719331880811 and 4719331805654, which no other source confirms, so they are not stored.
Announced
Not available
Status
Available5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The page showed the board In Stock on 2026-10-15. Best Sellers Rank was 18 in Computer Motherboards.
Predecessor
Not available
Successor
Not available
Launch price (US)
Not available
Launch price (EU)
Not available
Markets
Not available
Colours
Not available
Segment
Mainstream4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026The data sheet title names no gaming or creator use. Its tagline reads AMD B550 Ultra Durable. The board is not in a GIGABYTE AORUS, GAMING or EAGLE line, so it is stored as mainstream.
Board revision
Not available

Platform

CPU socket
AM41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: AMD Socket AM4.
Chipset
AMD B5501Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: Chipset AMD B550.
Supported processors
AMD Ryzen 5000 Series, AMD Ryzen 5000 G-Series, AMD Ryzen 4000 G-Series, AMD Ryzen 3000 Series1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 lists AMD Ryzen 5000 G-Series, 5000 Series, 4000 G-Series and 3000 Series Processors and refers to GIGABYTE's website for the latest CPU support list. The Rev. 1102 manual adds Ryzen 3000 G-Series, which LDLC says rev. 1.0 boards do not support (3200G and 3400G), so only the four series both manuals list are stored. The list was read on 2026-10-15.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026GIGABYTE User's Manual Rev. 1102, copyright 2026, for B550M K WIFI6E and B550M K, linked from a Russian retailer's page for rev. 1.2. Section 2-2 lists Ryzen 5000 G-Series, 5000, 4000 G-Series, 3000 G-Series and 3000 Series. The four series that rev. 1.0 also lists are stored.
CPU overclocking
Yes6Maker product pageamd.com/en/products/processors/chipsets/am4.htmlRead 15 October 2026AMD's AM4 chipset specifications table, B550 row: Overclocking Enabled: Yes. This is the chipset maker's feature, not a board spec. The board's BIOS options were not checked.

Board

Front and side, drawn to scale.

Form factor
Micro-ATX1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: Micro ATX Form Factor, 24.4cm x 24.4cm.
Board dimensions
Width244Height244mm(9.6 × 9.6 in)1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 24.4cm x 24.4cm, stored as 244 mm by 244 mm.
PCB layers
Not available
Back-connect design
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The section 1-1 layout and the section 2-7 connector list show the usual front-side power, fan and USB connectors.
RGB lighting on the board
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete Specifications list names no lighting on the board and no LED feature. The internal connector list has no RGB or ARGB header.

Power delivery

Power stage layout
3+35Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The GIGABYTE-branded listing says Digital 3+3 VRM Design in its bullets and 3+3 Power Phase in its title. GIGABYTE's own specification page and manuals give no phase count. A 4+3 count in an unreliable review and a 5+3 count on one retailer page disagree. The board photo on this page shows six output chokes beside the CPU socket, so the phases may be doubled and no Vcore stage count is stored.
CPU core (Vcore) power stages
Not available
Vcore power stage rating
Not available
VRM controller
Not available
CPU power connectors
8 pin1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 Internal Connectors: 1 x 24-pin ATX main power connector and 1 x 8-pin ATX 12V power connector.
Extra slot power connector
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has only the 24-pin and 8-pin ATX 12V connectors, so there is no extra slot power connector.

Memory

Memory type
DDR41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x DDR4 DIMM sockets.
Memory slots
41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x DDR4 DIMM sockets.
Max memory
128GB1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: up to 128 GB (32 GB single DIMM capacity) of system memory.
Max memory speed (overclocked)
4,733MT/s3Maker product pagegigabyte.com/Motherboard/B550M-K-rev-10/spRead 15 October 2026The search excerpt of the specification page lists DDR4 4733 (O.C.) as the top memory speed and 3200, 2933, 2667, 2400 and 2133 for plain modules. Ryzen 5000 is the newest processor family the board lists. The manuals list only the plain speeds up to 3200, so the product page is used, as the field rule says.4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026Supported memory clock speed (max) 4733 MHz, with the list 2133 up to 4733 MHz. It is the data rate in MT/s.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The listing's GIGABYTE infographic says DDR4 Overclocking up to 4733 MT/s.7Spec databasegeizhals.at/gigabyte-b550m-k-a2901610.htmlRead 15 October 2026RAM-Datenrate row: DDR4-3200 for Ryzen 3000 to 5000 and max. DDR4-4733 OC.
ECC memory
Yes1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 lists support for ECC Un-buffered DIMM 1Rx8/2Rx8 and non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 modules with no non-ECC mode qualifier. GIGABYTE's product page says ECC support varies by CPU, which still counts as true.
CUDIMM support
Not available

Expansion slots

Expansion slots
Physical slotElectrical lanesPCIe generationConnected toCount
PCIe x16164CPU1
PCIe x113Chipset1
Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 with Ryzen 5000 and 3000: 1 x PCI Express x16 slot from the CPU at PCIe 4.0 x16 (PCIe 3.0 x16 with Ryzen 5000 G-Series and 4000 G-Series) and 1 x PCI Express x1 slot from the chipset at PCIe 3.0 x1.
Full-length PCIe slots
1
Fastest PCIe x16 slot generation
4

Storage

M.2 storage slots
SlotPCIe generationPCIe lanesConnected toLongest driveTakes SATA drivesHeatsink
M2A_CPU44CPUM.2 2280YesNo
M2B_SB32ChipsetM.2 2280NoNo
Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 with Ryzen 5000 and 3000. M2A_CPU is from the CPU, type 2280, SATA and PCIe 4.0 x4/x2 SSDs (PCIe 3.0 with 5000 G-Series and 4000 G-Series). M2B_SB is from the chipset, type 2280, PCIe 3.0 x2 SSDs, with no SATA mode listed. Section 2-7 item 6 shows both slots held by a clip and no heatsink. No lane sharing is stated.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 2-2 gives the same M2A_CPU and M2B_SB slots, types and speeds as the Rev. 1001 manual.
M.2 slots
2
PCIe 5.0 M.2 slots
0
SATA ports
41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x SATA 6Gb/s connectors from the chipset.

Rear ports

Rear ports
TypeVersionCountMax link rate (Gbps)
USB-AUSB 3.2 Gen 145
USB-AUSB 2.040.48
DisplayPortDisplayPort 1.41Not available
HDMIHDMI 2.11Not available
Ethernet (RJ45)Not available11
3.5 mm audioNot available3Not available
PS/2Not available1Not available
Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 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 and 3 x audio jacks. The list has no button and no optical S/PDIF port. LAN is 1 Gbps. DisplayPort 1.4 (5120x2880 at 60 Hz) and HDMI 2.1 (4096x2160 at 60 Hz) work only with Ryzen 5000 G-Series and 4000 G-Series processors, which have integrated graphics.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 2-2 gives the same back panel list as the Rev. 1001 manual. Its LAN line adds 10 Mbps to 1 Gbps and 100 Mbps.
Rear USB ports
8
Rear USB-C ports
0
Fastest rear USB port
5Gbps
Thunderbolt
Not available

Internal connectors

Internal USB headers
HeaderMax data rate (Gbps)HeadersFront ports served
USB 3 header (19-pin)512
USB 2.0 header (9-pin)0.4812
Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 1 x USB 3.2 Gen 1 header and 1 x USB 2.0/1.1 header. Section 2-7 items 9 and 10: each header serves two ports through an optional bracket. No front USB-C header and no USB power output is stated.
Front USB-C header speed
Not available
Fan headers
21Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 Internal Connectors: 1 x CPU fan header and 1 x system fan header, both 4-pin.
ARGB headers
01Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has no ARGB header.
RGB headers
01Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has no RGB header.

Networking

Ethernet controllers
Not available
Ethernet ports
1
Ethernet speed
1Gbps
Wi-Fi included
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The Specifications list has no Wireless section and the back panel list has no antenna connectors. The newer B550M K WIFI6E is a separate model.
Wi-Fi standard
Not available
Wi-Fi bands
Not available
Max Wi-Fi channel width
Not available
Wi-Fi module
Not available
Bluetooth
Not available

Audio

We could not find any of these 2 fields. Show them
Audio codec
Not available
DAC chip
Not available

Features

BIOS flashback
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The back panel list has no button. Q-Flash is a BIOS utility and needs a CPU and memory.
Clear CMOS button (rear)
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-7 item 13 is the CLR_CMOS jumper. The back panel list has no button.
POST code display
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The specifications and connector list name no two-digit display.
Power button on the board
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The internal connector list and the section 1-1 layout name no power or start button on the board.
Dual BIOS
No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: BIOS is 1 x 128 Mbit flash with a licensed AMI UEFI BIOS. Dual BIOS is not named.
Pre-installed I/O shield
Not available
Tool-free features
Tool-free M.2 latch1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-7 item 6: pull the clip's tab out of the mounting hole, slide the M.2 SSD in, press it down and press the clip's tab into the mounting hole. No screw is used.

Measured

We could not find any of these 3 fields. Show them
VRM temperature under CPU load
Not available
Power draw idle
Not available
Power draw CPU stress
Not available

In the box

In the box
SATA cable, User's Manual, I/O Shield1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 1-2 box contents: B550M K motherboard, User's Manual, One SATA cable, I/O Shield, for reference only. The Rev. 1102 manual lists Two SATA cables, so the SATA cable count is not stored.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 1-2: B550M K WIFI6E or B550M K motherboard, User's Manual, I/O Shield, Two SATA cables and One antenna (WIFI6E only). The older Rev. 1001 manual says One SATA cable.

Warranty

Manufacturer warranty (source market)
3years4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026The data sheet from a European distributor feed gives Warranty period 3 year(s). The market is Europe. Amazon US says 3 Years Manufacturer.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026Warranty Description: 3 Years Manufacturer, on the US page.7Spec databasegeizhals.at/gigabyte-b550m-k-a2901610.htmlRead 15 October 2026Garantie row: 3 Jahre. The market is Austria.

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Sources

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  1. Read 15 October 2026Backs 31 fields
  2. Read 15 October 2026Backs 4 fields
  3. Read 15 October 2026Backs 3 fields
  4. Read 15 October 2026Backs 4 fields
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  6. Read 15 October 2026Backs 1 field
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  8. Read 15 October 2026Backs 2 fields

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