## Overview

The SelectModelDevice node allows you to manually choose which device (CPU or a specific GPU) a diffusion model runs on. It can move a model to a different device, and it handles conflicts with other multi-GPU nodes automatically.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| --- | --- | --- | --- | --- |
| `model` | The diffusion model to place on a specific device. | MODEL | Yes |  |
| `device` | The target device for the model. Options are dynamically generated based on available GPUs. (default: "default") | COMBO | Yes | `"default"`<br>`"cpu"`<br>`"gpu:0"`<br>`"gpu:1"`<br>`"gpu:2"`<br>`"gpu:3"`<br>`"gpu:4"`<br>`"gpu:5"`<br>`"gpu:6"`<br>`"gpu:7"` |

**Parameter Details:**
- `"default"`: Restores the device assigned by the model loader, even if a previous SelectModelDevice node changed it.
- `"cpu"`: Pins both the load and offload device to the CPU.
- `"gpu:N"`: Pins the load device to the Nth available GPU (e.g., `"gpu:0"` for the first GPU). The offload device is restored to the loader's original choice.

**Important Notes:**
- If the requested device does not exist on the current machine (e.g., a workflow created on a 2-GPU machine is opened on a 1-GPU machine), the node will pass the model through unchanged and log a message instead of failing.
- If the model is already on the requested device, the node takes a fast path and does not reload the model.
- Placing this node *after* a node that has already consumed the model (e.g., a KSampler) is not recommended, as any state changed by the prior node will be observed if the device matches the original.

## Outputs

| Output Name | Description | Data Type |
| --- | --- | --- |
| `model` | The diffusion model, now placed on the selected device. If the device was invalid or unavailable, the model is passed through unchanged. | MODEL |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/SelectModelDevice/en.md)

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