Add alternative portable download options for Windows (#784)

Generated-By: mintlify-agent

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: mintlify[bot]

installation/comfyui_portable_windows.mdx

@@ -33,6 +33,12 @@ You can get the latest ComfyUI Portable download link by clicking the link below
   </Card>
 </CardGroup>
 
+### Alternative downloads
+
+- [Experimental portable for AMD GPUs](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_amd.7z)
+- [Portable with PyTorch CUDA 12.8 and Python 3.12](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_nvidia_cu128.7z)
+- [Portable with PyTorch CUDA 12.6 and Python 3.12](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_nvidia_cu126.7z) (Supports Nvidia 10 series and older GPUs)
+
 After downloading, you can use decompression software like [7-ZIP](https://7-zip.org/) to extract the compressed package
 
 The file structure and description after extracting the portable version are as follows:

zh-CN/installation/comfyui_portable_windows.mdx

@@ -32,6 +32,12 @@ import AddExternalModels from "/snippets/zh/install/add-external-models.mdx"
   </Card>
 </CardGroup>
 
+### 其他下载选项
+
+- [AMD 显卡实验版](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_amd.7z)
+- [PyTorch CUDA 12.8 + Python 3.12 版本](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_nvidia_cu128.7z)
+- [PyTorch CUDA 12.6 + Python 3.12 版本](https://github.com/comfyanonymous/ComfyUI/releases/latest/download/ComfyUI_windows_portable_nvidia_cu126.7z)（支持 Nvidia 10 系列及更早的显卡）
+
 下载后你可以使用类似解压软件如 [7-ZIP](https://7-zip.org/) 对压缩包进行解压
 
 便携版解压后对应的文件结构及说明如下：