Radeon RX 6400
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How it stacks up to the flagship
Each metric is shown as a percentage of the GeForce RTX 5090 D, the strongest card we track.
Estimated benchmark results
Each result is shown as a share of the RTX 5090 D's score in the same test.
Performance breakdown
FPS Across Resolutions
What Owners Say
Owners like that it runs cool and needs no extra power cables, making it a drop-in upgrade. The usual gripe is it chokes on modern games past low settings thanks to the small memory.
- Plays 1080p games without a fuss
- Runs cool in tiny cases
- Needs no extra power cables
- Great for budget PC builds
- Only four gigabytes of VRAM
- No hardware encoding support
- PCIe 4.0 x4 cripples performance
Supported technologies
Full specifications
- CUDA Cores
- 768
- RT Cores
- 12
- TMUs
- 48
- ROPs
- 32
- L2 cache
- 1024 MB
- Size
- 4 GB
- Type
- GDDR6
- Bus width
- 64-bit
- Bandwidth
- 128 GB/s
- Memory clock
- 2000 MHz
- Base clock
- 1923 MHz
- Boost clock
- 2321 MHz
- FP32 (float)
- 3.565 TFLOPS
- FP16 (half)
- 3.565 TFLOPS
- Pixel rate
- 74 GPixel/s
- Texture rate
- 111.4 GTexel/s
- TDP
- 53W
- Suggested PSU
- 100W
- Power connectors
- None
- Bus interface
- PCIe 4.0 x4
- Slot width
- 1-slot
- Max resolution
- 7680×4320
- Outputs
- 1x HDMI 2.1, 1x DisplayPort 1.4a
API and SDK support
- DirectX
- 12 Ultimate (12_2)
- Shader Model
- 6.7
- OpenGL
- 4.6
- OpenCL
- 2.2
- Vulkan
- 1.3
Our verdict on the RX 6400
The RX 6400 is a low-profile, no-power-connector card made for basic gaming, but its limited memory and cut-down bus cripple performance.
Get it if you need a tiny, fanless graphics card for a basic office PC or a very small media build. Skip it if you want to play modern games at decent settings, as its limited memory and bandwidth will choke performance badly.
Buy it if…
- You want a basic display adapter for an office PC with no games.
- You need a low-profile card for a tiny prebuilt desktop upgrade.
- You are building the cheapest possible PC to play old esports titles.
Its place in the overall top
234 votes