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ASUS Phoenix Radeon RX 6400 Review | 118 Data compared

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  • Avg. price in UK: ~£150
  • Avg. price in US: ~$160
  • VRAM: 4 GB
  • Memory bus width: 64 bit
  • Thermal Design Power (TDP): 53 W

ASUS Phoenix 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%

4.2

Technical Score

10.0%

8.2

User score

Poor
4.2

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%

3.2

Performance

24.0%

2.6

Memory

12.0%

5.3

Power & Cooling

11.0%

8.2

Platform & Features

5.0%

8.2

Design

4.0%

5.8

Connectivity & Media

Poor
8.2

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%

9.0

User reviews

30.0%

6.3

Popularity

User score:
United Kingdom
amazon
4.5
(108)

(Reviews last updated: June 2026)

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

Verdict

The ASUS Phoenix Radeon RX 6400 is an entry-level graphics card featuring 768 stream processors, 4GB of GDDR6 memory on a 64-bit interface, and a 16MB Infinity Cache. Built on AMD's RDNA 2 architecture, it achieves a boost clock of up to 2321 MHz and a game clock of 2039 MHz. Its main strengths include its compact single-fan design with Axial-tech blades and dual ball bearings for longevity, as well as a low 53W power draw that requires no external power connectors, making it a reliable plug-and-play upgrade for older or small form factor systems. However, it is limited by its PCIe 4.0 x4 interface, which can cause performance drops on older PCIe 3.0 motherboards, and it lacks hardware-accelerated video encoding support.

Technical Specifications of ASUS Phoenix 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%

3.2

Performance

24.0%

2.6

Memory

12.0%

5.3

Power & Cooling

11.0%

8.2

Platform & Features

5.0%

8.2

Design

4.0%

5.8

Connectivity & Media

4.2
ASUS Phoenix Radeon RX 6400 has a technical score of 4.23 points, which is lower than that of 87.4% 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%

9.0

User reviews

30.0%

6.3

Popularity

User score:
United Kingdom
amazon
4.5
(108)

(Reviews last updated: June 2026)

8.2
ASUS Phoenix Radeon RX 6400 has a user score of 8.18 points, which is higher than that of 67.3% 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.
6.3
ASUS Phoenix Radeon RX 6400 has a popularity of 6.3 points, which is higher than 66.5% 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%

9.7

Price

6.2
ASUS Phoenix Radeon RX 6400 has a quality-to-price ratio of 6.2 points, which is lower than 75.6% 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

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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

3.565 TFLOPS
ASUS Phoenix Radeon RX 6400 delivers 3.565 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.
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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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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

1.3
ASUS Phoenix Radeon RX 6400 supports Vulkan 1.3, which is older than on 73.5% of graphics cards and equal to 22.5% 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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
ASUS Phoenix 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

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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
ASUS Phoenix 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
ASUS Phoenix 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

500 W
ASUS Phoenix Radeon RX 6400 recommends a 500 W PSU, which is lower than that of 76.2% of graphics cards and equal to that of 9.6% 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

N/A
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

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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

196 x 128.5 x 40.5 mm
ASUS Phoenix Radeon RX 6400 measures 196x128.5 x 40.5 mm, which is more compact than 98.2% of graphics cards.
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

196 mm
ASUS Phoenix Radeon RX 6400 is 196 mm long, which is shorter than 91.7% of graphics cards and equal in length to 0.2% of graphics cards.
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

128.5 mm
ASUS Phoenix Radeon RX 6400 is 128.5 mm tall, which is taller than 52.9% of graphics cards and equal in height to 0.1% of graphics cards.
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

2 slot/s
ASUS Phoenix Radeon RX 6400 occupies 2 slot/s, which is slimmer than 49.2% of graphics cards and equal in width to 47.3% 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

196 g
ASUS Phoenix Radeon RX 6400 weighs 196 g, which is lighter than 98.6% of graphics cards.
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ASUS Phoenix Radeon RX 6400 vs the average graphics card

  • 75.3% lower TDP
    ASUS Phoenix 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

    ASUS Phoenix 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
  • 32x larger L2 cache
    ASUS Phoenix Radeon RX 6400 has more L2 cache than the average graphics card (1,024 MB vs 32 MB). The average graphics card has 32 MB L2 cache.
    What it is: Total size of the GPU’s L2 cache memory
    When it matters: When cache size can help the GPU feed data faster in demanding scenes.

    Importance: LOW

    ASUS Phoenix Radeon RX 6400 has more L2 cache than the average graphics card (1,024 MB vs 32 MB). The average graphics card has 32 MB L2 cache.1024 MB vs 32 MB
  • 89.37 mm shorter card length
    ASUS Phoenix Radeon RX 6400 is shorter than the average graphics card (196 mm vs 285.37 mm). The average graphics card has a length of 285.37 mm.
    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

    ASUS Phoenix Radeon RX 6400 is shorter than the average graphics card (196 mm vs 285.37 mm). The average graphics card has a length of 285.37 mm.196 mm vs 285.37 mm
  • 23.1% lower PSU requirement
    ASUS Phoenix Radeon RX 6400 has a lower PSU requirement than the average graphics card (500 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

    ASUS Phoenix Radeon RX 6400 has a lower PSU requirement than the average graphics card (500 W vs 650 W). The average graphics card has a PSU requirement of 650 W.500 W vs 650 W
  • 14.3% faster VRAM clock
    ASUS Phoenix 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

    ASUS Phoenix 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
  • 3.53x cheaper
    ASUS Phoenix Radeon RX 6400 is cheaper than the average graphics card (£150 vs £530).
    ASUS Phoenix Radeon RX 6400 is cheaper than the average graphics card (£150 vs £530).£150 vs £530
  • Better FP64 ratio
    ASUS Phoenix 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

    ASUS Phoenix Radeon RX 6400 has a better FP64 ratio than the average graphics card (1:16 vs 1:64).1:16 vs 1:64
  • 75.9% lower peak power draw
    ASUS Phoenix 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.
    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

    ASUS Phoenix 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.53 W vs 220 W
  • Better FP64 ratio
    ASUS Phoenix Radeon RX 6400 has a better FP64 ratio than the average graphics card (1:16 vs 1:64).
  • 32x larger L2 cache
    ASUS Phoenix Radeon RX 6400 has more L2 cache than the average graphics card (1,024 MB vs 32 MB). The average graphics card has 32 MB L2 cache.
  • 14.3% faster VRAM clock
    ASUS Phoenix 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
    ASUS Phoenix 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.
  • Supports multi-GPU linking
    ASUS Phoenix Radeon RX 6400 supports multi-GPU linking, the average graphics card does not.
  • 75.3% lower TDP
    ASUS Phoenix 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.
  • 23.1% lower PSU requirement
    ASUS Phoenix Radeon RX 6400 has a lower PSU requirement than the average graphics card (500 W vs 650 W). The average graphics card has a PSU requirement of 650 W.
  • 75.9% lower peak power draw
    ASUS Phoenix 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.
  • 89.37 mm shorter card length
    ASUS Phoenix Radeon RX 6400 is shorter than the average graphics card (196 mm vs 285.37 mm). The average graphics card has a length of 285.37 mm.
  • 80.4% lighter card weight
    ASUS Phoenix Radeon RX 6400 is lighter than the average graphics card (196 g vs 998 g). The average graphics card weighs 998 g.

Total
Overall
Performance
Memory
Platform & Features
Power & Cooling
Design
  • 28 fewer compute units
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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.
  • 55% lower pixel rate
    ASUS Phoenix Radeon RX 6400 has a lower pixel rate than the average graphics card (74.3 GPixel/s vs 165.2 GPixel/s). The average graphics card has a pixel rate of 165.2 GPixel/s.
  • 32 fewer ROPs
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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.
  • 84.6% lower compute throughput
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix 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.
  • 75% less Infinity Cache
    ASUS Phoenix 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.
  • 15.8% slower memory speed
    ASUS Phoenix Radeon RX 6400 has a lower effective memory speed than the average graphics card (16,000 MHz vs 19,000 MHz). The average graphics card reaches an effective memory speed of 19,000 MHz.
  • Fewer PCIe lanes
    ASUS Phoenix 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
    ASUS Phoenix 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.
  • Older Vulkan version
    ASUS Phoenix Radeon RX 6400 supports an older Vulkan version than the average graphics card (1.3 vs 1.4).
  • 1 older
    ASUS Phoenix Radeon RX 6400 was released earlier than the average graphics card (2,022 vs 2,023).
  • Older OpenCL version
    ASUS Phoenix Radeon RX 6400 supports an older OpenCL version than the average graphics card (2.2 vs 3.0).
  • 75.3% fewer transistors
    ASUS Phoenix 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
    ASUS Phoenix 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
    ASUS Phoenix Radeon RX 6400 does not support AV1 encoding, the average graphics card does.
  • 2 fewer displays supported
    ASUS Phoenix Radeon RX 6400 supports fewer displays than the average graphics card (2 vs 4). The average graphics card supports 4 displays.
  • No AV1 decoding
    ASUS Phoenix Radeon RX 6400 does not support AV1 decoding, the average graphics card does.
  • 2 fewer monitors per output type
    ASUS Phoenix 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
    ASUS Phoenix Radeon RX 6400 is not VR ready, while the average graphics card is.
  • Narrower decode codec support
    ASUS Phoenix Radeon RX 6400 supports narrower hardware decode codec support than the average graphics card (H.264 vs H.264/H.265/AV1/VP9).
  • 2 fewer fans
    ASUS Phoenix Radeon RX 6400 has fewer fans than the average graphics card (1 vs 3).
  • 17 °C lower thermal ceiling
    ASUS Phoenix 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
    ASUS Phoenix Radeon RX 6400 does not include a backplate, the average graphics card does.
  • No RGB lighting
    ASUS Phoenix Radeon RX 6400 does not include RGB lighting, the average graphics card does.
  • 192 bit narrower memory bus
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix Radeon RX 6400 has fewer fans than the average graphics card (1 vs 3).1 vs 3
  • 36 fewer ray tracing cores
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix 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
    ASUS Phoenix 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

    ASUS Phoenix 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
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Platform & Features
Connectivity & Media
Power & Cooling
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Third-party reviews

United Kingdom
amazon
4.5
108 Reviews

(Reviews last updated: June 2026)

What customers like about ASUS Phoenix Radeon RX 6400?

  • Ultra-low power consumption (53W TDP) requiring no external power connectors
  • Compact single-slot and low-profile design fits well in small form factor (SFF) builds
  • Extremely quiet operation with idle fan stop technology
  • Great energy efficiency compared to previous generation entry-level cards
  • Sufficient performance for 1080p gaming in eSports titles like Fortnite and older games

What customers dislike about ASUS Phoenix Radeon RX 6400?

  • Significant performance loss (roughly 10%) when used on older PCIe 3.0 systems due to 4-lane limitation
  • Lacks hardware video encoding (H.264/H.265), making it poor for content creators and streamers
  • Limited 4GB VRAM and 64-bit bus can struggle with demanding modern textures
  • Poor value proposition; often priced too close to significantly faster cards like the RX 6500 XT or RTX 3050
  • Ray tracing performance is virtually unusable in real-world gaming scenarios

Video reviews

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