OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Motherboards Methodology v3.0
Motherboards Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Motherboards Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Motherboards Methodology v3.0

GIGABYTE B550M K review: 109 specs compared

Avg. price:~£70CPU socket:AM4Chipset:AMD B550Form factor:microATX

GIGABYTE B550M K Review: Compare 109 technical specifications to see how this product ranks in the Motherboards category and whether it is worth buying.

GIGABYTE B550M K
6.8/10

Overall score

Score
6.8/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, expert reviews, best-of lists, owners and ratings from across the web.
How we count it
Parts: Technical score 40%, Reviews score 20%, List score 20%, Sentiment score 10%, User score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components

40%

5.2

Technical score

20%

?

Reviews scoreNot enough data yet, so we use 7.8, the mark of a weaker model in this category

20%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

10%

?

Sentiment scoreNot enough data yet, so we use 7.0, the mark of a weaker model in this category

10%

9.2

User score

â–¼Worse than 58% of motherboards
7.7

Value for money

Value for money
7.7/ 10
✕
What it is
An indicator that combines the motherboard's overall rating with its cost.
When it matters
When you are looking for a motherboard that offers a strong balance of features, performance, and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 54% of models
Score components

70%

6.8

Overall score

30%

10

Price

â–¼Worse than 54%
5.2

Technical score

Technical score
5.2/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 40% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 70% of models
Score components

19%

6.9

Memory

16%

7.8

Platform

16%

5.4

Storage

15%

2.9

Network

13%

2.7

Ports

8%

3.9

Expansion

8%

4.5

Power & Cooling

5%

5.7

Audio

â–¼Worse than 70%
?

Reviews score

Reviews score
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
Share: Reviews count 20% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
Grades by review (0)
We have not found an independent test of this model yet. Until we do, its review part counts as 7.8.
Ratings from across the web count in the User score, not in this score.
No expert tests yet
9.2

User score

User score
9.2/ 10
✕
What it is
How happy buyers are with this model, based on ratings from across the web.
How we count it
Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 7.9, the mark of a weaker rated model in this category.
Share: User score counts 10% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 87% of models

70%

8.9

Rating

30%

10

Popularity

â–²Better than 87%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 20% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of motherboard GIGABYTE B550M K

Technical score
Technical score
5.2/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 40% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 70% of models
Score components:

19%

6.9

Memory

16%

7.8

Platform

16%

5.4

Storage

15%

2.9

Network

13%

2.7

Ports

8%

3.9

Expansion

8%

4.5

Power & Cooling

5%

5.7

Audio

5.2
Reviews score
7.8
User score
9.2
List score
?
Value for money
Value for money
7.7/ 10
✕
What it is
An indicator that combines the motherboard's overall rating with its cost.
When it matters
When you are looking for a motherboard that offers a strong balance of features, performance, and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 54% of models
Score components:

70%

6.8

Overall score

30%

10

Price

7.7
CPU socket
AM4
This motherboard uses AM4, which is more up-to-date than 38.2% of Motherboards and the same as 13.3% of Motherboards.
CPU platform
AMD
Chipset
AMD B550
This motherboard uses AMD B550, which is more capable than 49.9% of Motherboards and as capable as 4.8% of Motherboards.
Form factor
microATX
Integrated graphics support
yes
This motherboard supports integrated graphics. 10.2% of motherboards support this feature.
Show more
DDR memory version
DDR4
This motherboard uses DDR4, which is more modern than 13.4% of Motherboards and the same as 50.4% of Motherboards.
Memory slots
4
Market range: <2 – >4
This motherboard has 4 Memory slots, which is more than 21.9% of motherboards and equal to 72% of motherboards.
Maximum memory capacity
128 GB
Market range: <32 GB – >256 GB
This motherboard supports up to 128 GB of memory, which is more than 40.1% of motherboards and equal to 31.9% of motherboards.
Memory channels
2
Maximum RAM speed
3,200 MT/s
Market range: <2.1k MT/s – >8k MT/s
This motherboard supports memory speeds up to 3,200 MT/s, which is lower than that of 63.1% of motherboards and equal to that of 11.2% of motherboards.
Show more
N. of M.2 sockets
2
Market range: <0 – >4
This motherboard has 2 M.2 sockets, which is more than 30.5% of motherboards and equal to 34.5% of motherboards.
M.2 slot interface per slot
1x PCIe 4.0 x4, 1x PCIe 3.0 x2/SATA
This motherboard offers M.2 slots: 1x PCIe 4.0x4, 1x PCIe 3.0x2/SATA, which is faster than 63.7% of Motherboards and the same as 0.6% of Motherboards.
N. of SATA 3 connectors
4
Market range: <4 – >8
This motherboard has 4 SATA 3 connectors, which is more than 6.1% of motherboards and equal to 46.8% of motherboards.
Supported RAID levels
0/1/10
This motherboard RAID support: 0/1/10, which is less flexible than 67.6% of Motherboards and the same as 23.6% of Motherboards.
SATA only
NVMe RAID support
yes
This motherboard supports NVMe RAID. 40.2% of motherboards support this feature.
Show more
N. of PCIe 5.0 x16 slots
0
Market range: <0 – >1
This motherboard has 0 PCIe 5.0x16 slots, which is fewer than 31.6% of motherboards and equal to 68.4% of motherboards.
N. of PCIe 4.0 x16 slots
1
Market range: <0 – >1
This motherboard has 1 PCIe 4.0x16 slots, which is more than 55.2% of motherboards and equal to 35.7% of motherboards.
N. of PCIe 3.0 x16 slots
0
Market range: <0 – >3
This motherboard has 0 PCIe 3.0x16 slots, which is fewer than 59.6% of motherboards and equal to 40.4% of motherboards.
runs at x1 mode
PCIe slot electrical configuration
x16/x0/x0
This motherboard splits its PCIe lanes as x16/x0/x0, which is less generous than 73.2% of Motherboards and the same as 3.1% of Motherboards.
PCIe bifurcation support
yes
This motherboard supports PCIe bifurcation. 40.3% of motherboards support this feature.
Show more
Total USB ports (rear I/O)
8
Market range: <6 – >10
This motherboard has 8 USB ports (rear I/O), which is more than 40.6% of motherboards and equal to 30.3% of motherboards.
Total USB ports (including headers)
12
Market range: <11 – >19
This motherboard has 12 USB ports (including headers), which is fewer than 72.4% of motherboards and equal to 16.2% of motherboards.
Total USB-C ports (rear I/O)
0
Market range: <0 – >2
This motherboard has 0 USB-C ports (rear I/O), which is fewer than 64.2% of motherboards and equal to 35.8% of motherboards.
Total USB-C ports (including headers)
0
Market range: <0 – >3
This motherboard has 0 USB-C ports (including headers), which is fewer than 69.5% of motherboards and equal to 30.5% of motherboards.
N. of USB 3.2 Gen2x2 ports (USB-C)
0
Market range: <0 – >1
This motherboard has 0 USB 3.2 Gen2x2 ports (USB-C), which is fewer than 18% of motherboards and equal to 82% of motherboards.
Show more
LAN speed
1 Gbps
Market range: <1 Gbps – >2.5 Gbps
This motherboard supports LAN speeds up to 1 Gbps, which is lower than that of 51.1% of motherboards and equal to that of 48.9% of motherboards.
LAN controller
Killer + Intel + Realtek
This motherboard has a Killer + Intel + Realtek LAN controller, which is slower than 64.6% of Motherboards and equal to 28.7% of Motherboards.
N. of RJ45 ports
1
Market range: <1 – >2
This motherboard has 1 RJ45 ports, which is fewer than 14.4% of motherboards and equal to 85.6% of motherboards.
Wi-Fi connectivity
no
This motherboard does not support Wi-Fi connectivity. 50.1% of motherboards support this feature.
Wi-Fi version
N/A
Show more
Audio codec
Realtek ALC897
This motherboard uses Realtek ALC897, which is higher-end than 20.2% of Motherboards and the same as 29.9% of Motherboards.
Audio channels
7.1
This motherboard offers 7.1 audio channels, which is more than 4.7% of motherboards and equal to 95.3% of motherboards.
Audio SNR
88 dB
Market range: <95 dB – >120 dB
This motherboard has an audio SNR of 88 dB, which is lower than that of 97.8% of motherboards and equal to that of 0.6% of motherboards.
Headphone amp support
no
This motherboard does not support a headphone amp. 58.8% of motherboards support this feature.
N. of 3.5mm audio jacks
3
Market range: <2 – >6
This motherboard has 3 3.5mm audio jacks, which is more than 11.3% of motherboards and equal to 39.3% of motherboards.
Show more
VRM phases
4+2
This motherboard has 4+2 VRM phases, which is fewer than 88.4% of motherboards and equal to 5.4% of motherboards.
N. of CPU power connectors
1
Market range: <1 – >2
This motherboard has 1 CPU power connectors, which is fewer than 45.2% of motherboards and equal to 54.9% of motherboards.
N. of fan headers
2
Market range: <3 – >8
This motherboard has 2 fan headers, which is fewer than 92% of motherboards and equal to 8% of motherboards.
Pump header
yes
This motherboard has a pump header. 22.1% of motherboards include this feature.
Pump header max current
0 A
Market range: <0 A – >3 A
This motherboard supports up to 0 A on the pump header, which is lower than that of 76.2% of motherboards and equal to that of 23.8% of motherboards.
Show more

GIGABYTE B550M K vs the average motherboard

246810TotalPlatformMemoryStorageExpansionPortsNetworkAudioPower & Cooling
  • 1 more PCIe 4.0x16 slots
    This motherboard has more PCIe 4.0x16 slots than the average motherboard (1 vs 0). The average motherboard has 0 PCIe 4.0x16 slot/s.
    1 vs 0
  • More up-to-date socket
    This motherboard uses a more up-to-date socket than the average motherboard (AM4 vs LGA 1151).
    AM4 vs LGA 1,151
  • Supports ECC memory
    This motherboard supports ECC memory, while the average motherboard does not. 20.9% of motherboards support ECC memory.
    ECC requires compatible CPU.
  • 24.3% higher user score
    User score
    9.2/ 10
    ✕
    What it is
    How happy buyers are with this model, based on ratings from across the web.
    How we count it
    Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 7.9, the mark of a weaker rated model in this category.
    Share: User score counts 10% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–² Better than 87% of models

    70%

    8.9

    Rating

    30%

    10

    Popularity

    9.2 vs 7.4
  • 2.14x cheaper
    GIGABYTE B550M K is cheaper than the average motherboard (£70 vs £150).
    £70 vs £150
  • 24.3% higher user score
    User score
    9.2/ 10
    ✕
    What it is
    How happy buyers are with this model, based on ratings from across the web.
    How we count it
    Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 7.9, the mark of a weaker rated model in this category.
    Share: User score counts 10% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–² Better than 87% of models

    70%

    8.9

    Rating

    30%

    10

    Popularity

    9.2 vs 7.4
  • 2.14x cheaper
    GIGABYTE B550M K is cheaper than the average motherboard (£70 vs £150).
    £70 vs £150
  • More up-to-date socket
    This motherboard uses a more up-to-date socket than the average motherboard (AM4 vs LGA 1151).
    AM4 vs LGA 1,151
  • Supports ECC memory
    This motherboard supports ECC memory, while the average motherboard does not. 20.9% of motherboards support ECC memory.
    ECC requires compatible CPU.
  • 1 more PCIe 4.0x16 slots
    This motherboard has more PCIe 4.0x16 slots than the average motherboard (1 vs 0). The average motherboard has 0 PCIe 4.0x16 slot/s.
    1 vs 0
  • 60% lower LAN speed
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    1 Gbps vs 2.5 Gbps
  • More basic chipset
    This motherboard uses a more basic chipset than the average motherboard (AMD B550 vs Intel B860).
    AMD B550 vs Intel B860
  • No Wi-Fi connectivity
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50.1% of motherboards support Wi-Fi connectivity.
  • 27 dB lower audio SNR
    This motherboard has a lower audio SNR than the average motherboard (88 dB vs 115 dB). The average motherboard has audio SNR of 115 dB.
    88 dB vs 115 dB
  • 1 fewer rear USB-C ports
    This motherboard has fewer rear USB-C ports than the average motherboard (0 vs 1). The average motherboard has 1 rear USB-C port/s.
    0 vs 1
  • No Wi-Fi antenna included
    This motherboard does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • Fewer VRM phases
    This motherboard has fewer VRM phases than the average motherboard (4+2 vs 10). The average motherboard has 10 VRM phase/s.
    4+2 vs 10
  • 3 fewer total USB connections
    This motherboard has fewer total USB connections than the average motherboard (12 vs 15). The average motherboard has 15 total USB connections.
    12 vs 15
  • More basic chipset
    This motherboard uses a more basic chipset than the average motherboard (AMD B550 vs Intel B860).
    AMD B550 vs Intel B860
  • No debug LED indicators
    This motherboard does not have debug LED indicators, while the average motherboard does. 78.7% of motherboards include debug LED indicators.
  • 31.9% lower maximum RAM speed
    This motherboard has a lower maximum RAM speed than the average motherboard (3,200 MT/s vs 4,699.5 MT/s). The average motherboard supports RAM speed of 4,699.5 MT/s.
    3,200 MT/s vs 4,699.5 MT/s
  • Fewer RAID options
    This motherboard offers fewer RAID levels than the average motherboard (0/1/10 vs 0/1/5/10).
    SATA only
    0/1/10 vs 0/1/5/10
  • Slower NVMe storage slots
    This motherboard has slower M.2 slots than the average motherboard (1x PCIe 4x4, 1x PCIe 3x2/SATA vs 1x PCIe 5x4, 2x PCIe 4x4).
    1x PCIe 4.0x4, 1x PCIe 3.0x2/SATA vs 1x PCIe 5.0x4, 2x PCIe 4.0x4
  • No multi-GPU support
    This motherboard does not support multi-GPU, while the average motherboard does. 53.9% of motherboards support multi-GPU.
  • Less generous lane split
    This motherboard splits its PCIe lanes less generously than the average motherboard (x16/x0/x0 vs x16/x0/x4, x8/x8/x4).
    x16/x0/x0 vs x16/x0/x4, x8/x8/x4
  • 1 fewer PCIe 3.0x16 slots
    This motherboard has fewer PCIe 3.0x16 slots than the average motherboard (0 vs 1). The average motherboard has 1 PCIe 3.0x16 slot/s.
    runs at x1 mode
    0 vs 1
  • 1 fewer rear USB-C ports
    This motherboard has fewer rear USB-C ports than the average motherboard (0 vs 1). The average motherboard has 1 rear USB-C port/s.
    0 vs 1
  • 3 fewer total USB connections
    This motherboard has fewer total USB connections than the average motherboard (12 vs 15). The average motherboard has 15 total USB connections.
    12 vs 15
  • 1 fewer USB 3.2 Gen2 ports
    This motherboard has fewer USB 3.2 Gen2 ports than the average motherboard (0 vs 1). The average motherboard has 1 USB 3.2 Gen2 port/s.
    0 vs 1
  • 1 fewer USB 2.0 headers
    This motherboard has fewer USB 2.0 headers than the average motherboard (1 vs 2). The average motherboard has 2 USB 2.0 header/s.
    1 vs 2
  • 1 fewer total USB-C connections
    This motherboard has fewer total USB-C connections than the average motherboard (0 vs 1). The average motherboard has 1 total USB-C connections.
    0 vs 1
  • 60% lower LAN speed
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    1 Gbps vs 2.5 Gbps
  • No Wi-Fi connectivity
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50.1% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    This motherboard does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • 27 dB lower audio SNR
    This motherboard has a lower audio SNR than the average motherboard (88 dB vs 115 dB). The average motherboard has audio SNR of 115 dB.
    88 dB vs 115 dB
  • No headphone amp support
    This motherboard does not support a headphone amp, while the average motherboard does. 58.8% of motherboards support a headphone amp.
  • No optical S/PDIF out
    This motherboard does not have optical S/PDIF out, while the average motherboard does. 55.4% of motherboards include optical S/PDIF out.
  • Fewer VRM phases
    This motherboard has fewer VRM phases than the average motherboard (4+2 vs 10). The average motherboard has 10 VRM phase/s.
    4+2 vs 10
  • 3.5 fewer fan headers
    This motherboard has fewer fan headers than the average motherboard (2 vs 5.5). The average motherboard has 5.5 fan header/s.
    2 vs 5.5
  • 2 fewer ARGB headers
    This motherboard has fewer ARGB headers than the average motherboard (0 vs 2). The average motherboard has 2 ARGB header/s.
    0 vs 2
  • 1 fewer RGB headers
    This motherboard has fewer RGB headers than the average motherboard (0 vs 1). The average motherboard has 1 RGB header/s.
    0 vs 1
  • 2 A lower pump header current limit
    This motherboard has a lower pump header current than the average motherboard (0 A vs 2 A). The average motherboard provides pump header current of 2 A.
    0 A vs 2 A

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Overview video
Overview video
Overview video
Not graded
Overview video
Overview video

Third-party reviews

What customers like about GIGABYTE B550M K

  • Excellent value for budget-conscious entry-level AM4 builds
  • Features two M.2 slots for storage expansion, rare for this price category
  • Supports PCIe 4.0 for improved GPU and SSD data transfer speeds
  • User-friendly BIOS that is easy to navigate for beginners
  • Reliable performance when paired with 65W TDP processors like the Ryzen 5 5600
  • Compact Micro-ATX form factor ideal for smaller PC cases

What customers don't like about GIGABYTE B550M K

  • Poor VRM cooling with no heatsinks, leading to high temperatures under heavy loads
  • Not recommended for high-end CPUs (e.g., Ryzen 9) due to power delivery limitations
  • Lacks ARGB (addressable RGB) headers for advanced lighting customization
  • No built-in Wi-Fi or Bluetooth connectivity
  • Limited internal headers, including only one system fan header
  • Basic build quality with a thinner PCB than more premium B550 models

Verdict

The Gigabyte B550M K is a budget-focused Micro-ATX motherboard built on the AMD B550 chipset, supporting AM4-socket Ryzen 3000, 4000, and 5000 series processors. Key specifications include four DDR4 DIMM slots supporting up to 128GB of memory at speeds up to 4733MHz (OC), dual M.2 slots (one PCIe 4.0 and one PCIe 3.0), and a primary PCIe 4.0 x16 expansion slot. Its main pros are the inclusion of dual M.2 connectors, out-of-the-box support for Ryzen 5000 series CPUs, and Ultra Durable components like anti-sulfur resistors and solid pin power connectors that enhance long-term reliability. However, significant cons include the complete absence of integrated Wi-Fi or Bluetooth, a relatively basic 4+2 phase VRM design without substantial heatsinks that may struggle with high-TDP Ryzen 9 processors, and a limited rear I/O offering only four USB 3.2 Gen 1 and four USB 2.0 ports.

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