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AMD Radeon RX 6400 Review | 118 Data compared

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  • Avg. price in UK: ~£170
  • Avg. price in US: ~$160
  • VRAM: 4 GB
  • Memory bus width: 64 bit
  • Thermal Design Power (TDP): 53 W

AMD Radeon RX 6400 review. Compare 118 technical specifications and user reviews to see how it ranks among graphics cards and if it is worth buying.

4.6

Overall score

What it is: An overall evaluation of the graphics card's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best graphics cards on the market.

Score components:

90.0%

4.1

Technical Score

10.0%

9.0

User score

Poor
4.1

Technical Score

What it is: An assessment of the graphics card's technical performance, covering key areas such as gaming and rendering performance, ray tracing, memory configuration, power efficiency, cooling, connectivity, features, and build quality.

When it matters: When you want to compare graphics cards based on technical performance and available features.

Score components:

44.0%

3.3

Performance

24.0%

1.9

Memory

12.0%

5.4

Power & Cooling

11.0%

8.6

Platform & Features

5.0%

6.4

Design

4.0%

5.8

Connectivity & Media

Poor
9.0

User score

What it is: A rating that combines user reviews and the total number of reviews received by the graphics card.

When it matters: When you want to understand how a graphics card performs in real use and how reliable it is in terms of performance, temperatures, noise, stability, and long-term ownership.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(699)
amazon
4.1
(280)
amazon
4.5
(176)
amazon
4.4
(61)
amazon
4.5
(28)
United States
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4.3
(733)
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4.2
(281)
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4.5
(178)
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4.3
(61)
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4.5
(28)

(Reviews last updated: June 2026)

Exceptional
  • 2.0
    Gaming

    Score components:

    45.0%

    1.2

    Floating-point performance

    25.0%

    1.6

    VRAM

    20.0%

    1.0

    Ray tracing cores / units

    10.0%

    8.8

    PCI Express (PCIe) version

  • 4.5
    Video editing

    Score components:

    35.0%

    7.0

    AV1 encode

    30.0%

    1.6

    VRAM

    20.0%

    1.2

    Floating-point performance

    15.0%

    8.8

    PCI Express (PCIe) version

  • 2.0
    1080p

    Score components:

    55.0%

    1.2

    Floating-point performance

    25.0%

    1.6

    VRAM

    10.0%

    1.0

    Ray tracing cores / units

    10.0%

    8.8

    PCI Express (PCIe) version

  • 1.7
    1440p

    Score components:

    50.0%

    1.2

    Floating-point performance

    30.0%

    1.6

    VRAM

    15.0%

    1.0

    Ray tracing cores / units

    5.0%

    8.8

    PCI Express (PCIe) version

  • 1.7
    4K

    Score components:

    40.0%

    1.2

    Floating-point performance

    35.0%

    1.6

    VRAM

    20.0%

    1.0

    Ray tracing cores / units

    5.0%

    8.8

    PCI Express (PCIe) version

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Best prices in UK

Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The AMD Radeon RX 6400 is an entry-level graphics card based on the RDNA 2 architecture and built on a 6nm process, featuring 768 stream processors, 12 ray accelerators, and a boost clock of up to 2321 MHz. It is equipped with 4GB of GDDR6 memory on a narrow 64-bit bus with 16MB of Infinity Cache and utilizes a PCIe 4.0 x4 interface. Its main pros include an exceptionally low 53W TDP that requires no external power connectors, making it ideal for low-profile, single-slot, small form factor (SFF) upgrades. However, significant cons include a performance drop of up to 10-15% when used on older PCIe 3.0 systems, a lack of AV1 decoding and H.264/H.265 encoding capabilities, and limited 4GB VRAM which struggles with modern AAA titles.

Technical Specifications of AMD Radeon RX 6400

Technical Score

What it is: An assessment of the graphics card's technical performance, covering key areas such as gaming and rendering performance, ray tracing, memory configuration, power efficiency, cooling, connectivity, features, and build quality.

When it matters: When you want to compare graphics cards based on technical performance and available features.

Score components:

44.0%

3.3

Performance

24.0%

1.9

Memory

12.0%

5.4

Power & Cooling

11.0%

8.6

Platform & Features

5.0%

6.4

Design

4.0%

5.8

Connectivity & Media

4.1
AMD Radeon RX 6400 has a technical score of 4.06 points, which is lower than that of 89.2% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the graphics card.

When it matters: When you want to understand how a graphics card performs in real use and how reliable it is in terms of performance, temperatures, noise, stability, and long-term ownership.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(699)
amazon
4.1
(280)
amazon
4.5
(176)
amazon
4.4
(61)
amazon
4.5
(28)
United States
Amazon_logo.png
4.3
(733)
Amazon_logo.png
4.2
(281)
Amazon_logo.png
4.5
(178)
Amazon_logo.png
4.3
(61)
Amazon_logo.png
4.5
(28)

(Reviews last updated: June 2026)

9.0
AMD Radeon RX 6400 has a user score of 9.04 points, which is higher than that of 78.7% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by the graphics card.
When it matters: When you prefer a graphics card that has already been chosen and reviewed by many other users.
10
AMD Radeon RX 6400 has a popularity of 10 points, which is higher than 77.9% of products in this category.
Ratio quality/price

What it is: An indicator that combines the graphics card's overall rating with its cost.

When it matters: When you are looking for a graphics card that offers a strong balance of performance, features, and price.

Score components:

60.0%

4.6

Overall score

40.0%

9.6

Price

6.1
AMD Radeon RX 6400 has a quality-to-price ratio of 6.1 points, which is lower than 79.1% of products in this category.
3DMark Time Spy benchmark score
What it is: Benchmark result from 3DMark Time Spy, a synthetic DirectX 12 test often used as a quick gaming-performance reference.
When it matters: When you need a fast rough performance sort before digging into game-specific reviews and frame-rate data.

Importance: LOW

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3DMark Port Royal score
What it is: Benchmark result from 3DMark Port Royal, a synthetic test focused on ray tracing performance.
When it matters: When ray tracing matters in the games you actually play and you want one quick way to separate stronger and weaker RT cards.

Importance: LOW

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PassMark (G3D) result
What it is: Overall GPU performance score in PassMark G3D benchmark
When it matters: When you need one broad score to sort cards into rough performance tiers.

Importance: LOW

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PassMark (DirectCompute) result
What it is: PassMark score for DirectCompute performance tests
When it matters: When compute workloads matter alongside gaming performance.

Importance: LOW

2,787 points
AMD Radeon RX 6400 scores 2787 points in PassMark DirectCompute, which is lower than 69.4% of graphics cards.
Floating-point performance
What it is: Theoretical floating-point compute performance of the GPU.
When it matters: When rendering, AI, or heavy compute work needs strong single-precision throughput.

Importance: LOW

3.57 TFLOPS
AMD Radeon RX 6400 delivers 3.57 TFLOPS floating-point performance, which is lower than that of 92.8% of graphics cards and equal to that of 0.1% of graphics cards.
Show more
VRAM
What it is: Total video memory available on the graphics card
When it matters: When you play at high settings, use texture mods, or work with large creative projects.

Importance: HIGH

4 GB
AMD Radeon RX 6400 has 4 GB of VRAM, which is less than 88% of graphics cards and equal to 6% of graphics cards.
Memory type
What it is: Type of graphics memory used (GDDR6, HBM2e, etc.)
When it matters: When memory technology is part of the buying decision because it affects bandwidth class, power use, and product positioning.

Importance: LOW

GDDR6
GDDR version
What it is: Generation of GDDR memory used by the graphics card.
When it matters: When you want to separate older memory generations from newer ones before comparing bandwidth, power behavior, and market tier.

Importance: LOW

GDDR6
AMD Radeon RX 6400 uses GDDR6 memory, which is newer than on 16.6% of graphics cards and equal to 39.1% of graphics cards.
Memory bus width
What it is: Width of the memory interface bus in bits
When it matters: When you care about steadier performance at higher resolutions, heavier texture settings, or ray-traced workloads that stress memory traffic.

Importance: HIGH

64 bit
AMD Radeon RX 6400 uses a 64 bit memory bus, which is narrower than that of 97.4% of graphics cards and equal to that of 2.6% of graphics cards.
Maximum memory bandwidth
What it is: Maximum data transfer rate between GPU and its memory
When it matters: When 4K gaming, ray tracing, or creator work can choke a slower memory subsystem.

Importance: HIGH

128 GB/s
AMD Radeon RX 6400 reaches 128 GB/s memory bandwidth, which is lower than that of 92.7% of graphics cards and equal to that of 0.7% of graphics cards.
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PCI Express (PCIe) version
What it is: Version of PCI Express interface supported
When it matters: When you are pairing the card with an older motherboard and want to avoid leaving bandwidth or future compatibility on the table.

Importance: LOW

4.0
AMD Radeon RX 6400 supports PCIe 4.0, which is newer than on 22.5% of graphics cards and equal to 52% of graphics cards.
PCIe lanes
What it is: Number of PCI Express lanes used for communication
When it matters: When limited lane width could bottleneck the card in some systems.

Importance: LOW

x4
AMD Radeon RX 6400 uses x4 PCIe lanes, which is fewer than 89.5% of graphics cards and equal to 0.9% of graphics cards.
DirectX version
What it is: Highest supported DirectX API version
When it matters: When you play newer Windows games that depend on the latest graphics features.

Importance: LOW

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Vulkan version
What it is: Highest supported Vulkan API version
When it matters: When modern games, emulators, or creative apps lean on Vulkan support.

Importance: LOW

1.4
AMD Radeon RX 6400 supports Vulkan 1.4, which is more advanced than on 26.6% of graphics cards and equal to 73.4% of graphics cards.
OpenGL version
What it is: Highest supported OpenGL API version
When it matters: When older games or pro apps still depend on OpenGL compatibility.

Importance: LOW

4.6
AMD Radeon RX 6400 supports OpenGL 4.6, which is more advanced than on 4.8% of graphics cards and equal to 95.2% of graphics cards.
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Max displays supported
What it is: Total number of external displays supported simultaneously
When it matters: When you run a multi-monitor desk for sim racing, trading, or editing.

Importance: LOW

2
AMD Radeon RX 6400 supports up to 2 displays, which is fewer than 98.1% of graphics cards and equal to 1.9% of graphics cards.
Max digital resolution
What it is: Maximum supported digital display resolution
When it matters: When you plan to drive 4K or 8K panels at their native resolution.

Importance: LOW

7680x4320
AMD Radeon RX 6400 supports a maximum digital resolution of 7680x4320, which is higher than that of 44.4% of graphics cards and equal to that of 55.6% of graphics cards.
DisplayPort outputs
What it is: Number of DisplayPort video outputs
When it matters: When your setup needs several high-refresh monitors without adapters.

Importance: LOW

1
AMD Radeon RX 6400 offers 1 DisplayPort outputs, which is fewer than 89.5% of graphics cards and equal to 8.6% of graphics cards.
DisplayPort version
What it is: Version of DisplayPort standard supported
When it matters: When your monitor setup depends on newer DisplayPort features for higher refresh rates, higher resolution, or better cable flexibility.

Importance: LOW

1.4a
AMD Radeon RX 6400 supports DisplayPort 1.4a, which is more advanced than on 22.7% of graphics cards and equal to 44.2% of graphics cards.
DisplayPort link rates
What it is: Supported data link rates for DisplayPort connections
When it matters: When you are pushing high resolution and refresh rate over DisplayPort.

Importance: LOW

8.1 Gbps
AMD Radeon RX 6400 supports DisplayPort link rates up to 8.1 Gbps, which is slower than on 50.4% of graphics cards and equal to 40.5% of graphics cards.
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Thermal Design Power (TDP)
What it is: Typical power consumption under full load (TDP)
When it matters: When you need a realistic idea of power draw before choosing a PSU or case.

Importance: MEDIUM

53 W
AMD Radeon RX 6400 has a TDP of 53 W, which is lower than that of 96.5% of graphics cards and equal to that of 0.1% of graphics cards.
Power consumption while under peak load
What it is: Peak power draw of the graphics card under maximum load.
When it matters: When transient-heavy gaming loads could stress your power supply.

Importance: LOW

53 W
AMD Radeon RX 6400 draws 53 W under peak load, which is lower than 96.6% of graphics cards and equal to 0.2% of graphics cards.
Recommended PSU wattage
What it is: Recommended wattage of the system power supply
When it matters: When you are checking whether your current power supply is enough.

Importance: LOW

350 W
AMD Radeon RX 6400 recommends a 350 W PSU, which is lower than that of 94.2% of graphics cards and equal to that of 1% of graphics cards.
Board power limit
What it is: Maximum configurable power limit for the GPU board
When it matters: When you care about how far the card can be pushed through tuning or factory power settings.

Importance: LOW

53 W
AMD Radeon RX 6400 has a board power limit of 53 W, which is lower than that of 97.3% of graphics cards.
PCIe power spec
What it is: PCIe power delivery specification followed
When it matters: When you are checking whether the slot and external cables match the card's intended power-delivery standard.

Importance: LOW

53 W
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Size
What it is: Physical size of the GPU card
When it matters: When you need the card to fit a compact case without blocking nearby hardware.

Importance: LOW

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Length
What it is: Physical length of the GPU card
When it matters: When front radiators or drive cages leave only limited GPU clearance.

Importance: LOW

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Height
What it is: Physical height of the GPU card
When it matters: When side panels, brackets, or tight case layouts reduce vertical clearance.

Importance: LOW

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Slot width
What it is: Number of PCIe slots occupied by the card
When it matters: When you need room for another PCIe card or better airflow under the GPU.

Importance: LOW

1 slot/s
AMD Radeon RX 6400 occupies 1 slot/s, which is slimmer than 96.6% of graphics cards and equal in width to 3.4% of graphics cards.
Weight
What it is: Total weight of the graphics card
When it matters: When sag, bracket support, or shipping stress matters in your build.

Importance: LOW

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AMD Radeon RX 6400 vs the average graphics card

  • 75.3% lower TDP
    AMD Radeon RX 6400 has a lower TDP than the average graphics card (53 W vs 215 W). The average graphics card has a TDP of 215 W.
    What it is: Typical power consumption under full load (TDP)
    When it matters: When you need a realistic idea of power draw before choosing a PSU or case.

    Importance: MEDIUM

    AMD Radeon RX 6400 has a lower TDP than the average graphics card (53 W vs 215 W). The average graphics card has a TDP of 215 W.53 W vs 215 W
  • 46.2% lower PSU requirement
    AMD Radeon RX 6400 has a lower PSU requirement than the average graphics card (350 W vs 650 W). The average graphics card has a PSU requirement of 650 W.
    What it is: Recommended wattage of the system power supply
    When it matters: When you are checking whether your current power supply is enough.

    Importance: LOW

    AMD Radeon RX 6400 has a lower PSU requirement than the average graphics card (350 W vs 650 W). The average graphics card has a PSU requirement of 650 W.350 W vs 650 W
  • Supports ECC memory
    AMD Radeon RX 6400 supports ECC memory, the average graphics card does not.
    What it is: Supports error-correcting code memory for higher reliability
    When it matters: When stability and error correction matter more than pure gaming value.

    Importance: LOW

    AMD Radeon RX 6400 supports ECC memory, the average graphics card does not.
  • 75.9% lower board power limit
    AMD Radeon RX 6400 has a lower board power limit than the average graphics card (53 W vs 220 W). The average graphics card has a board power limit of 220 W.
    What it is: Maximum configurable power limit for the GPU board
    When it matters: When you care about how far the card can be pushed through tuning or factory power settings.

    Importance: LOW

    AMD Radeon RX 6400 has a lower board power limit than the average graphics card (53 W vs 220 W). The average graphics card has a board power limit of 220 W.53 W vs 220 W
  • 14.3% faster VRAM clock
    AMD Radeon RX 6400 has a higher VRAM clock than the average graphics card (2,000 MHz vs 1,750 MHz). The average graphics card runs its VRAM at 1,750 MHz.
    What it is: Speed at which the GPU memory operates
    When it matters: When you want more context on how quickly the card's VRAM can move data.

    Importance: LOW

    AMD Radeon RX 6400 has a higher VRAM clock than the average graphics card (2,000 MHz vs 1,750 MHz). The average graphics card runs its VRAM at 1,750 MHz.2000 MHz vs 1750 MHz
  • 1 slot/s slimmer design
    AMD Radeon RX 6400 occupies fewer slots than the average graphics card (1 slot/s vs 2 slot/s). The average graphics card occupies 2 slot/s.
    What it is: Number of PCIe slots occupied by the card
    When it matters: When you need room for another PCIe card or better airflow under the GPU.

    Importance: LOW

    AMD Radeon RX 6400 occupies fewer slots than the average graphics card (1 slot/s vs 2 slot/s). The average graphics card occupies 2 slot/s.1 slot/s vs 2 slot/s
  • 3.12x cheaper
    AMD Radeon RX 6400 is cheaper than the average graphics card (£170 vs £530).
    AMD Radeon RX 6400 is cheaper than the average graphics card (£170 vs £530).£170 vs £530
  • Better FP64 ratio
    AMD Radeon RX 6400 has a better FP64 ratio than the average graphics card (1:16 vs 1:64).
    What it is: Ratio of double-precision (FP64) to single-precision (FP32) performance
    When it matters: When you need to know whether FP64 is merely present or genuinely useful.

    Importance: LOW

    AMD Radeon RX 6400 has a better FP64 ratio than the average graphics card (1:16 vs 1:64).1:16 vs 1:64
  • Better FP64 ratio
    AMD Radeon RX 6400 has a better FP64 ratio than the average graphics card (1:16 vs 1:64).
  • Supports ECC memory
    AMD Radeon RX 6400 supports ECC memory, the average graphics card does not.
  • 14.3% faster VRAM clock
    AMD Radeon RX 6400 has a higher VRAM clock than the average graphics card (2,000 MHz vs 1,750 MHz). The average graphics card runs its VRAM at 1,750 MHz.
  • 64.8% smaller GPU die
    AMD Radeon RX 6400 has a lower GPU die size than the average graphics card (107 mm² vs 304.25 mm²). The average graphics card has a GPU die size of 304.25 mm².
  • 75.3% lower TDP
    AMD Radeon RX 6400 has a lower TDP than the average graphics card (53 W vs 215 W). The average graphics card has a TDP of 215 W.
  • 46.2% lower PSU requirement
    AMD Radeon RX 6400 has a lower PSU requirement than the average graphics card (350 W vs 650 W). The average graphics card has a PSU requirement of 650 W.
  • 75.9% lower board power limit
    AMD Radeon RX 6400 has a lower board power limit than the average graphics card (53 W vs 220 W). The average graphics card has a board power limit of 220 W.
  • 75.9% lower peak power draw
    AMD Radeon RX 6400 has a lower peak power draw than the average graphics card (53 W vs 220 W). The average graphics card has a peak power draw of 220 W.
  • 63.6% lower idle power draw
    AMD Radeon RX 6400 has a lower idle power draw than the average graphics card (4 W vs 11 W). The average graphics card has an idle power draw of 11 W.
  • 1 slot/s slimmer design
    AMD Radeon RX 6400 occupies fewer slots than the average graphics card (1 slot/s vs 2 slot/s). The average graphics card occupies 2 slot/s.

Total
Overall
Performance
Memory
Platform & Features
Power & Cooling
Design
  • 28 fewer compute units
    AMD Radeon RX 6400 has fewer compute units than the average graphics card (12 vs 40). The average graphics card has 40 compute units.
  • 36 fewer ray tracing cores
    AMD Radeon RX 6400 has fewer ray tracing cores than the average graphics card (12 vs 48). The average graphics card has 48 ray tracing cores.
  • 136 fewer TMUs
    AMD Radeon RX 6400 has fewer TMUs than the average graphics card (48 vs 184). The average graphics card has 184 TMUs.
  • 70.4% lower texture rate
    AMD Radeon RX 6400 has a lower texture rate than the average graphics card (111.4 GTexel/s vs 376.8 GTexel/s). The average graphics card has a texture rate of 376.8 GTexel/s.
  • No CUDA support
    AMD Radeon RX 6400 does not support CUDA, the average graphics card does.
  • 32 fewer ROPs
    AMD Radeon RX 6400 has fewer ROPs than the average graphics card (32 vs 64). The average graphics card has 64 ROPs.
  • 84.4% lower FP32 performance
    AMD Radeon RX 6400 has a lower FP32 performance than the average graphics card (3.6 TFLOPS vs 22.86 TFLOPS). The average graphics card has FP32 performance of 22.86 TFLOPS.
  • 7.2% lower boost clock speed
    AMD Radeon RX 6400 has a lower boost GPU clock than the average graphics card (2,321 MHz vs 2,500 MHz). The average graphics card has a boost GPU clock of 2,500 MHz.
  • 75.8% lower FP16 performance
    AMD Radeon RX 6400 has a lower FP16 performance than the average graphics card (7.1 TFLOPS vs 29.5 TFLOPS). The average graphics card has FP16 performance of 29.5 TFLOPS.
  • 3,584 fewer FP32 units
    AMD Radeon RX 6400 has fewer FP32 units than the average graphics card (768 vs 4,352). The average graphics card has 4,352 FP32 units.
  • 84.5% lower compute throughput
    AMD Radeon RX 6400 has a lower compute throughput than the average graphics card (3.6 TFLOPS vs 23.105 TFLOPS). The average graphics card has compute throughput of 23.105 TFLOPS.
  • 52.1% lower FP64 performance
    AMD Radeon RX 6400 has a lower FP64 performance than the average graphics card (0.2 TFLOPS vs 0.4651 TFLOPS). The average graphics card has FP64 performance of 0.4651 TFLOPS.
  • 192 bit narrower memory bus
    AMD Radeon RX 6400 has a narrower memory bus than the average graphics card (64 bit vs 256 bit). The average graphics card has a memory bus width of 256 bit.
  • 8 GB less VRAM
    AMD Radeon RX 6400 has fewer VRAM than the average graphics card (4 GB vs 12 GB). The average graphics card has 12 GB VRAM.
  • 71.4% lower memory bandwidth
    AMD Radeon RX 6400 has a lower memory bandwidth than the average graphics card (128 GB/s vs 448 GB/s). The average graphics card has a memory bandwidth of 448 GB/s.
  • 96.9% smaller L2 cache
    AMD Radeon RX 6400 has fewer L2 cache than the average graphics card (1 MB vs 32 MB). The average graphics card has 32 MB L2 cache.
  • 75% less Infinity Cache
    AMD Radeon RX 6400 has fewer Infinity Cache than the average graphics card (16 MB vs 64 MB). The average graphics card has 64 MB Infinity Cache.
  • Fewer PCIe lanes
    AMD Radeon RX 6400 has fewer PCIe lanes than the average graphics card (x4 vs x16). The average graphics card has x16 PCIe lanes.
  • 20% larger process node
    AMD Radeon RX 6400 has a higher process node than the average graphics card (6 nm vs 5 nm). The average graphics card uses a process node of 5 nm.
  • 1 older
    AMD Radeon RX 6400 was released earlier than the average graphics card (2,022 vs 2,023).
  • Older OpenCL version
    AMD Radeon RX 6400 supports an older OpenCL version than the average graphics card (2.2 vs 3.0).
  • 75.3% fewer transistors
    AMD Radeon RX 6400 has fewer transistors than the average graphics card (5,400 million vs 21,900 million). The average graphics card has 21,900 million transistors.
  • 2 fewer DisplayPort outputs
    AMD Radeon RX 6400 has fewer DisplayPort outputs than the average graphics card (1 vs 3). The average graphics card has 3 DisplayPort outputs.
  • No AV1 encoding
    AMD Radeon RX 6400 does not support AV1 encoding, the average graphics card does.
  • 2 fewer displays supported
    AMD Radeon RX 6400 supports fewer displays than the average graphics card (2 vs 4). The average graphics card supports 4 displays.
  • No AV1 decoding
    AMD Radeon RX 6400 does not support AV1 decoding, the average graphics card does.
  • 2 fewer monitors per output type
    AMD Radeon RX 6400 supports fewer monitors per output type than the average graphics card (2 vs 4). The average graphics card supports 4 monitors per output type.
  • Not VR ready
    AMD Radeon RX 6400 is not VR ready, while the average graphics card is.
  • 2 fewer fans
    AMD Radeon RX 6400 has fewer fans than the average graphics card (1 vs 3).
  • 17 °C lower thermal ceiling
    AMD Radeon RX 6400 has a lower thermal ceiling than the average graphics card (110 °C vs 93 °C). The average graphics card has a thermal ceiling of 93 °C.
  • No backplate
    AMD Radeon RX 6400 does not include a backplate, the average graphics card does.
  • No RGB lighting
    AMD Radeon RX 6400 does not include RGB lighting, the average graphics card does.
  • 192 bit narrower memory bus
    AMD Radeon RX 6400 has a narrower memory bus than the average graphics card (64 bit vs 256 bit). The average graphics card has a memory bus width of 256 bit.
    What it is: Width of the memory interface bus in bits
    When it matters: When you care about steadier performance at higher resolutions, heavier texture settings, or ray-traced workloads that stress memory traffic.

    Importance: HIGH

    AMD Radeon RX 6400 has a narrower memory bus than the average graphics card (64 bit vs 256 bit). The average graphics card has a memory bus width of 256 bit.64 bit vs 256 bit
  • 28 fewer compute units
    AMD Radeon RX 6400 has fewer compute units than the average graphics card (12 vs 40). The average graphics card has 40 compute units.
    What it is: Total number of shader multiprocessors or compute units
    When it matters: When you want a better sense of the GPU's overall parallel hardware resources before relying on game benchmarks alone.

    Importance: HIGH

    AMD Radeon RX 6400 has fewer compute units than the average graphics card (12 vs 40). The average graphics card has 40 compute units.12 vs 40
  • 2 fewer fans
    AMD Radeon RX 6400 has fewer fans than the average graphics card (1 vs 3).
    What it is: Total number of cooling fans
    When it matters: When you compare cooler designs and want one more clue about thermal potential.

    Importance: MEDIUM

    AMD Radeon RX 6400 has fewer fans than the average graphics card (1 vs 3).1 vs 3
  • 36 fewer ray tracing cores
    AMD Radeon RX 6400 has fewer ray tracing cores than the average graphics card (12 vs 48). The average graphics card has 48 ray tracing cores.
    What it is: Number of dedicated ray tracing processing cores or units
    When it matters: When you care about ray-traced lighting, reflections, and shadows in newer games.

    Importance: HIGH

    AMD Radeon RX 6400 has fewer ray tracing cores than the average graphics card (12 vs 48). The average graphics card has 48 ray tracing cores.12 vs 48
  • 8 GB less VRAM
    AMD Radeon RX 6400 has fewer VRAM than the average graphics card (4 GB vs 12 GB). The average graphics card has 12 GB VRAM.
    What it is: Total video memory available on the graphics card
    When it matters: When you play at high settings, use texture mods, or work with large creative projects.

    Importance: HIGH

    AMD Radeon RX 6400 has fewer VRAM than the average graphics card (4 GB vs 12 GB). The average graphics card has 12 GB VRAM.4 GB vs 12 GB
  • 136 fewer TMUs
    AMD Radeon RX 6400 has fewer TMUs than the average graphics card (48 vs 184). The average graphics card has 184 TMUs.
    What it is: Total count of texture mapping units on the GPU
    When it matters: When texture-heavy gaming performance matters and you want extra hardware context behind texture-rate claims.

    Importance: HIGH

    AMD Radeon RX 6400 has fewer TMUs than the average graphics card (48 vs 184). The average graphics card has 184 TMUs.48 vs 184
  • 70.4% lower texture rate
    AMD Radeon RX 6400 has a lower texture rate than the average graphics card (111.4 GTexel/s vs 376.8 GTexel/s). The average graphics card has a texture rate of 376.8 GTexel/s.
    What it is: Number of textured pixels the GPU can process per second
    When it matters: When fast texture handling matters in high-refresh gaming workloads.

    Importance: HIGH

    AMD Radeon RX 6400 has a lower texture rate than the average graphics card (111.4 GTexel/s vs 376.8 GTexel/s). The average graphics card has a texture rate of 376.8 GTexel/s.111.4 GTexel/s vs 376.8 GTexel/s
  • 71.4% lower memory bandwidth
    AMD Radeon RX 6400 has a lower memory bandwidth than the average graphics card (128 GB/s vs 448 GB/s). The average graphics card has a memory bandwidth of 448 GB/s.
    What it is: Maximum data transfer rate between GPU and its memory
    When it matters: When 4K gaming, ray tracing, or creator work can choke a slower memory subsystem.

    Importance: HIGH

    AMD Radeon RX 6400 has a lower memory bandwidth than the average graphics card (128 GB/s vs 448 GB/s). The average graphics card has a memory bandwidth of 448 GB/s.128 GB/s vs 448 GB/s
Total
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Performance
Memory
Platform & Features
Connectivity & Media
Power & Cooling
Design

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Third-party reviews

United Kingdom
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4.3
699 Reviews
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4.1
280 Reviews
amazon
4.5
176 Reviews
amazon
4.4
61 Reviews
amazon
4.5
28 Reviews
United States
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4.3
733 Reviews
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4.2
281 Reviews
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4.5
178 Reviews
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4.3
61 Reviews
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4.5
28 Reviews

(Reviews last updated: June 2026)

What customers like about AMD Radeon RX 6400?

  • Ultra-low power consumption (TDP ~53W) requiring no external PCIe power connectors
  • Available in low-profile and single-slot form factors, ideal for small office PCs (SFF)
  • Significantly faster than integrated graphics and older entry-level cards like the GT 1030
  • Highly energy efficient and generally runs cool and quiet under load
  • Support for modern features like Ray Tracing and AMD FidelityFX Super Resolution (FSR)

What customers dislike about AMD Radeon RX 6400?

  • Significant performance loss (10% or more) when used on older PCIe 3.0 systems due to x4 lane limitation
  • Lacks essential hardware video encoding (H.264/H.265) and AV1 decoding
  • Limited 4GB VRAM and narrow 64-bit memory bus cause stuttering in demanding modern titles
  • Poor value proposition compared to slightly more expensive cards like the RX 6600 or used market alternatives
  • Ray tracing performance is too weak for practical gaming at standard settings
  • Locked against overclocking, preventing users from squeezing out extra performance

Expert reviews

C
club386.com
07/07/2022
ASRock Radeon RX 6400 Challenger ITX review

The ASRock Radeon RX 6400 Challenger ITX is a pint-sized, entry-level graphics card measuring 162mm long and weighing 273g, making it an excellent fit for small-form-factor systems. Built on AMD’s 6nm RDNA 2 architecture with 768 shaders and 4GB of GDDR6 memory, the card targets 1080p (FHD) gaming at medium to high settings. In performance testing, it significantly outperforms its...Read more

P
pcmag.com
01/11/2023
Sapphire Pulse AMD Radeon RX 6400Go to product viewer dialog for this item. Review Are you looking for benchmarks regarding a specific game or PCIe 3....

The Sapphire Pulse AMD Radeon RX 6400 is an ultra-compact, single-slot GPU designed specifically for low-profile, small-form-factor (SFF) systems, offering a 4GB GDDR6 upgrade that requires no external power cables. It serves as a quiet, efficient solution for ultra-small PCs, though its limited PCIe 4.0 x4 interface causes significant performance penalties on older PCIe 3.0...Read more

C
cgmagonline.com
18/10/2022
AMD Radeon RX 6400 (GPU) Review

The CGMagazine review highlights the AMD Radeon RX 6400 as an affordable, energy-efficient, and cool-running GPU designed to modernize older PC setups. It provides a noticeable visual upgrade over older, entry-level cards by smoothing textures and improving lighting in games. However, the card is limited by 4GB of VRAM and poor ray-tracing performance, which, at 14 FPS, is...Read more

M
mkaugaming.com
29/09/2022
AMD Radeon RX 6400 GPU - Review - MKAU Gaming

The MKAU Gaming review concludes that the AMD Radeon RX 6400 is a capable entry-level card, offering surprising 1080p performance for its modest specifications. Pros highlighted include an ultra-compact, low-power 53W design with no external power required, making it ideal for SFF/office PC upgrades. However, the card faces severe performance bottlenecks in demanding titles due to...Read more

G
guru3d.com
08/09/2022
Radeon RX 6400 review

The Radeon RX 6400 is a budget graphics card that offers reasonable Full HD (1080p) gaming performance, averaging around 50 FPS in common titles, provided it is paired with a PCIe 4.0 interface and the appropriate in-game quality settings are selected. On the positive side, the card operates with a very low 55W power consumption and remains highly efficient under load. Its cooling...Read more

T
tomshardware.com
24/06/2022
AMD Radeon RX 6400 Review: Budget in Almost Every Way

The AMD Radeon RX 6400 is an entry-level graphics card built on the Navi 24 architecture with 4GB of VRAM and a 64-bit bus width. Priced at a starting MSRP of $160, it represents the lowest-performance modern GPU tested by Tom's Hardware, designed strictly to cater to ultra-budget or small-form-factor builds. Its biggest selling point is efficiency; it has a low 53W TDP and draws...Read more

T
techspot.com
03/05/2022
AMD Radeon RX 6400 Review - TechSpot

The TechSpot review of the AMD Radeon RX 6400 highlights the card as a niche, entry-level, low-profile GPU designed for small-form-factor systems. Its primary pros include a 53-watt power draw that eliminates the need for external power connectors, allowing for a straightforward upgrade in pre-built PCs, while providing adequate 1080p performance for esports on PCIe 4.0 systems....Read more

T
techpowerup.com
25/04/2022
AMD Radeon RX 6400 Review - Value & Conclusion

The MSI Radeon RX 6400 Aero ITX is a highly compact, entry-level card designed for small form factor systems and budget upgrades, noted for its extreme energy efficiency and silent, whisper-quiet operation. Pros include requiring no external PCIe power cables and supporting modern features like FSR and DirectX 12 Ultimate. However, significant drawbacks include low gaming...Read more

T
techpowerup.com
06/05/2022
AMD Radeon RX 6400 Tested on PCI-Express 3.0

The TechPowerUp review demonstrates that the AMD Radeon RX 6400 suffers from severe bandwidth bottlenecks when used with PCI-Express 3.0, resulting in an average performance loss of 14% at 1080p and 1440p, and up to 23% at 4K compared to PCIe 4.0. Performance drops are most severe in VRAM-intensive games like God of War, which saw a 35% decline, due to the card's limited PCIe 4.0 x4...Read more

P
pcgameshardware.de
29/08/2022
Arc A380 vs. RX 6400 inkl. Raytracing + Fazit

Based on the provided review, the Intel Arc A380 entry-level graphics card presents a mixed performance profile when closely compared against the AMD Radeon RX 6400. The A380's primary advantages lie in its hardware specifications, specifically its larger 6 GiByte memory capacity, 8 PCI Express lanes, and dedicated, Nvidia-like Raytracing units within the shader cores. In demanding...Read more

(Translated)Show original
G
geeknetic.es
11/09/2022
Sapphire PULSE AMD Radeon RX 6400 Review Geeknetic

The Sapphire PULSE AMD Radeon RX 6400 is an entry-level graphics card based on the 6nm RDNA2 architecture, explicitly tailored for budget-conscious users and ultra-compact setups. Measuring just 170mm long and occupying a single slot, its standout design feature is its highly compact, low-profile form factor that includes both standard and half-height brackets. It operates...Read more

(Translated)Show original

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