> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# SamplerDpmppSde - ComfyUI Built-in Node Documentation

> Complete documentation for the SamplerDpmppSde node in ComfyUI. Learn its inputs, outputs, parameters and usage.

This node is designed to generate a sampler for the DPM++ SDE (Stochastic Differential Equation) model. It adapts to both CPU and GPU execution environments, optimizing the sampler's implementation based on the available hardware.

## Inputs

| Parameter      | Data Type      | Description                                                                                                                |
| -------------- | -------------- | -------------------------------------------------------------------------------------------------------------------------- |
| `eta`          | FLOAT          | Specifies the step size for the SDE solver, influencing the granularity of the sampling process.                           |
| `s_noise`      | FLOAT          | Determines the level of noise to be applied during the sampling process, affecting the diversity of the generated samples. |
| `r`            | FLOAT          | Controls the ratio of noise reduction in the sampling process, impacting the clarity and quality of the generated samples. |
| `noise_device` | COMBO\[STRING] | Selects the execution environment (CPU or GPU) for the sampler, optimizing performance based on available hardware.        |

## Outputs

| Parameter | Data Type | Description                                                                                           |
| --------- | --------- | ----------------------------------------------------------------------------------------------------- |
| `sampler` | SAMPLER   | The generated sampler configured with the specified parameters, ready for use in sampling operations. |