[Feature Request] Add AMD ROCm support to Local Managed Server (Windows)

[0xDELUXA]

Now that AMD has officially released ROCm for Windows, and the ComfyUI x AMD collaboration brings official support for AMD GPUs on Windows too, it makes sense for the Local Managed Server to include an option like:
Use ROCm (AMD GPUs)

While it’s technically possible to get this working via a Custom Server, that approach is not very beginner-friendly. Supporting ROCm directly in the Local Managed Server would greatly simplify setup for less experienced users and help streamline the overall onboarding process.

ROCm on Windows has reached a stable state and offers significantly better performance and compatibility compared to the current DirectML-based solution available in the Local Managed Server menu.

Adding native ROCm support would improve usability, performance, and accessibility for AMD GPU users on Windows.

[Acly]

See #76, there was #2244 but not further response

From what I hear about general stability of ROCm support it's messy, and I don't have hardware that supports it.

I've no objections to including it, but someone needs to test and maintain it (at least look into issues a bit).

[0xDELUXA]

I see.

I’ve been using krita-ai-diffusion for about half a year now and haven’t encountered any issues related to ROCm.
There is no ROCm/Windows wheel available in the official PyTorch index, instead, AMD builds and publishes their Windows wheels at https://repo.radeon.com/rocm/windows/.

In my opinion, README.md should be updated to state:

Hardware support

AMD GPU: ROCm (Linux/Windows, official ComfyUI installation)

Since ComfyUI natively supports AMD via ROCm on both platforms: https://www.comfy.org/download.

There is essentially no reason to use DirectML on AMD GPUs, as its performance is typically 2-3x slower (or worse) compared to native ROCm on Linux or Windows.

[Acly]

Yes DirectML is pretty obsolete.

But you mention like 3 different index now so it's pretty unclear still.

Seems like official download for ComfyUI uses https://repo.radeon.com/rocm/windows/rocm-rel-7.2 wheels and installs them manually, but the installer doesn't support linux.

[0xDELUXA]

Yeah, Linux doesn't have a Desktop Application, this says:

Available on Windows & macOS.

Linux goes the manual install route.