---
title: "Sampler vs Scheduler — ComfyUI Glossary & Node Definition"
description: "The sampler is the mathematical solver (euler, dpmpp_2m) while the scheduler spaces the noise levels across steps (karras, simple, normal). Learn how Sampler vs Scheduler works inside ComfyUI node workflows on Windows."
canonical: https://comfy.ink/words/sampler-vs-scheduler
updated: 2026-10-17
---

# Sampler vs Scheduler

The sampler is the mathematical solver (euler, dpmpp_2m) while the scheduler spaces the noise levels across steps (karras, simple, normal).

## Facts (2026-10-17)

- **Term:** Sampler vs Scheduler
- **In Short:** The sampler is the mathematical solver (euler, dpmpp_2m) while the scheduler spaces the noise levels across steps (karras, simple, normal).
- **Applies To:** ComfyUI SD 1.5, SDXL, Flux & Video

## Definition: Sampler vs Scheduler

The sampler is the mathematical solver (euler, dpmpp_2m) while the scheduler spaces the noise levels across steps (karras, simple, normal).

ComfyUI separates sampler_name and scheduler into two dropdowns on KSampler so you can pair any ODE/SDE solver with Karras, SGM Uniform, Beta, or Simple noise schedules.

## How to tune this in your ComfyUI workflow

Every parameter in ComfyUI is exposed directly on its node rather than hidden behind global settings tabs. You can inspect or override this behavior per pass in [ComfyUI Studio](https://comfy.ink/studio).

New to node graphs? Grab the Windows installer at [/download](https://comfy.ink/download) and open a built-in template from the workflow menu.

## FAQ

### What does Sampler vs Scheduler do in ComfyUI?

The sampler is the mathematical solver (euler, dpmpp_2m) while the scheduler spaces the noise levels across steps (karras, simple, normal). ComfyUI separates sampler_name and scheduler into two dropdowns on KSampler so you can pair any ODE/SDE solver with Karras, SGM Uniform, Beta, or Simple noise schedules.

### Where do I adjust this setting on the canvas?

Check the corresponding loader or [KSampler](https://comfy.ink/nodes/ksampler) widget in your active workflow graph.

## Related

- [ComfyUI Glossary](https://comfy.ink/words)
- [KSampler & KSampler (Advanced)](https://comfy.ink/nodes/ksampler)
- [ComfyUI Studio Workspace](https://comfy.ink/studio)
- [ComfyUI VRAM Requirements for SDXL, Flux & Video (6GB–24GB)](https://comfy.ink/guides/comfyui-vram-requirements-guide)
- [Latent Space & LATENT Pin](https://comfy.ink/words/latent-space)

## Download

Free desktop app: [Download Comfy](https://comfy.ink/download)

Markdown mirror: https://comfy.ink/words/sampler-vs-scheduler.md