comfyui and amd radeon card

[catman133]

when i install comfyui on ubuntu with your guide im asked what gpu i have my answer is amd but it install nividia drivers and cuda support when i start comfyui it says i cant becouse it cant find any nividia drivers and asks me to dl nividia drivers, i realy dont understand this, i done exactly everything in the guide i can run it on cpu only but i want to use my radeon card with 12gb ram please can someone tell me what to do.and when i closed comfyui and want to start it again the terminal cand find the path to comfy-env bin to activate again ?

[Blackfish95]

What AMD gpu do you have? I use the 9070XT 16gb with Comfy on Ubuntu, it works really well. You have to start with installing the AMDGPU drivers and then ROCM 7.1.1 from the official AMD repo. https://rocm.docs.amd.com/projects/radeon-ryzen/en/latest/index.html check to make sure your GPU is supported. Then follow the instructions to install AMDGPU for ROCM, https://rocm.docs.amd.com/projects/radeon-ryzen/en/latest/docs/install/installrad/native_linux/install-radeon.html
Then create the venv, then install ComfyUI https://rocm.docs.amd.com/projects/radeon-ryzen/en/latest/docs/advanced/advancedrad/linux/comfyui/installcomfyui.html

[catman133]

Ok now i have installed ROCm and amd drivers . thank you for your help

[catman133]

I have radeon RX 6700 XT 12gb i have looked there and there is so many drivers i dont know wich one i need i dont want to mes it up and im new to ubuntu so im not sure how to install them

[Blackfish95]

https://rocm.docs.amd.com/projects/install-on-linux/en/latest/reference/system-requirements.html
ROCm support is for RX 7700 and later. I'm afraid your 6700 isn't supported according to this.

ChatGPT's answer:

1. Official ROCm support

Recent ROCm versions (e.g., 6.x/7.x) officially support RDNA3-based consumer cards (such as the RX 7000 series), but not the RX 6700 XT.
Reddit

Community experience shows that newer ROCm releases may fail to recognize Navi22 GPUs even when installed, leading to errors like “no HIP GPUs available.”
GitHub

2. Community workarounds (Linux)

Some users have forced ROCm to work on RX 6700 XT/6750 XT by overriding the GPU target or using older ROCm versions (e.g., ROCm 5.7) with environment variables like HSA_OVERRIDE_GFX_VERSION=10.3.0. This can make PyTorch detect the GPU, but it’s unofficial and fragile (breaks with newer ROCm).
DEV Community
+1

Success with such hacks varies and may require matching specific driver versions, manual builds of ROCm components, and environment tweaks.

3. Alternative approaches

On Windows, people typically use DirectML or ZLUDA to run ComfyUI on AMD GPUs like the RX 6700 XT because ROCm isn’t available there. This doesn’t use ROCm; it uses an abstraction layer to translate to DirectX compute, and it works, albeit typically slower than CUDA.
Facebook
+1

ComfyUI-ZLUDA forks exist that add partial AMD support (for cards including RX 6000 series), but this is not native ROCm integration and may lack full performance or feature parity.
GitHub

4. Practical recommendation

If your goal is reliable, high-performance GPU acceleration for ComfyUI image generation, a card with official ROCm support (e.g., RX 7900 series or newer) or an NVIDIA CUDA GPU remains the most straightforward path.

If you want to stick with RX 6700 XT, expect to use workarounds (DirectML on Windows or ROCm hacks on Linux), and be prepared for configuration challenges.