SDXL 1.0 - SUPER FAST Render Times + Google Colab Guide

Olivio Sarikas
28 Jul 202315:27

TLDRThis video tutorial introduces the fastest method to utilize the SDXL 1.0 for super-fast rendering times, showcasing how to set up Comfy UI for both Nvidia GPU users and those looking to use Google Colab. It provides a step-by-step guide on updating Comfy UI, loading models, and rendering images with detailed explanations of the process, including the use of text prompts and the rendering engine. The tutorial also covers how to access and use Comfy UI within Google Colab, offering an alternative for those without powerful GPUs, and concludes with a demonstration of the rendering process and the resulting image.


  • ๐Ÿ˜€ The video introduces the fastest method to use SDXL 1.0 with Comfy UI, which can significantly reduce render times to just 9.3 seconds.
  • ๐Ÿ”ง For those without access to an Nvidia GPU, the video demonstrates how to use Comfy UI within Google Colab, leveraging its GPU resources.
  • ๐Ÿ’ป The first step is to download and install Comfy UI, which is a portable standalone application for Windows, simplifying the setup process.
  • ๐Ÿ“ An update folder in Comfy UI contains different beta versions for updating the software, ensuring users have the latest features.
  • ๐ŸŒ Comfy UI examples on GitHub showcase various node builds, including an SDXL build, which can be downloaded and imported into Comfy UI for a complete setup.
  • ๐Ÿ”„ Comfy UI allows the use of multiple models simultaneously in the same window, enhancing flexibility and creativity in image rendering.
  • ๐Ÿ“ The script explains how to configure model search paths in the standalone Windows build, enabling users to load models from different folders.
  • ๐Ÿ–ผ๏ธ The rendering process in Comfy UI involves using both a base model and a refiner model, with the base model handling the initial steps and the refiner completing the process for enhanced detail.
  • ๐Ÿ”ข The video outlines the importance of setting the correct number of steps and end steps in the rendering process to balance the workload between the base and refiner models.
  • ๐Ÿ”— The script describes the technical aspects of the rendering process, including the use of a CLIP text encoder and a VAE decoder to convert latent images into pixel images.
  • ๐ŸŒ For those with limited GPU capabilities, Google Colab offers a free tier with slower GPUs, and a Pro Plan for faster access to powerful GPUs like the V100.
  • ๐Ÿ“š The video provides a step-by-step guide on setting up and using Comfy UI within Google Colab, including downloading necessary models and setting up a local tunnel for UI access.

Q & A

  • What is the main topic of the video 'SDXL 1.0 - SUPER FAST Render Times + Google Colab Guide'?

    -The main topic of the video is to demonstrate the fastest method to use the SDXL 1.0 software for rendering images quickly, including a guide on how to use Comfy UI and how to utilize Google Colab for those who can't afford a high-end Nvidia GPU.

  • What is Comfy UI and how can it be installed?

    -Comfy UI is a user interface for running Stable Diffusion models. It can be installed by downloading a 7-Zip file from the provided link and running it to get a portable standalone version for Windows.

  • How can users update their Comfy UI version?

    -Users can update their Comfy UI version by going to the 'update' folder in the main directory and running either 'update_configure.bat' or 'update_comfyui_and_python_dependencies.bat'.

  • What is the purpose of the 'conf UI examples' link on the GitHub page?

    -The 'conf UI examples' link provides powerful and mind-blowing examples of different note builds, including an SDXL build, which can be downloaded and used as a complete build with all the nodes.

  • How does the process of rendering with SDXL in Comfy UI differ from Automatic 1111?

    -In Comfy UI, the process stays as a latent image, which doesn't have image information but is a set of latent data points that the AI creates, and only at the last step is it converted into a pixel image. In contrast, Automatic 1111 creates a pixel image and then renders this pixel image again in image-to-image mode.

  • What is the significance of using both a base model and a refiner model in the rendering process?

    -The base model and the refiner model are used to enhance the quality of the rendered image. The base model renders the initial steps, and the refiner model takes over for the remaining steps to refine the details of the image.

  • How can users customize the search paths for models in the Comfy UI standalone Windows build?

    -Users can customize the search paths for models by editing the 'extra_model_paths.yaml' file, which can be found in the Comfy UI directory after renaming the 'example_extra_model_paths.yaml' file provided in the link.

  • What is the recommended resolution for rendering with SDXL 1.0 as mentioned in the script?

    -The recommended resolution for rendering with SDXL 1.0 is 1024 by 1024 pixels with a batch size of one.

  • How can users utilize Google Colab for rendering images without a powerful GPU?

    -Users can use Google Colab by connecting to a GPU, which provides a certain amount of free GPU time. For more consistent access, users can opt for the Google Colab Pro Plan or purchase computing units for GPU usage.

  • What is the process of using Comfy UI within Google Colab as described in the video?

    -The process involves opening the provided Colab notebook link, connecting to a GPU, installing the necessary models and dependencies, setting up a local tunnel, and then accessing the UI interface through a provided link to start rendering.

  • How does the video guide the user to load the SDXL workflow in Google Colab?

    -The video instructs the user to load the SDXL workflow by clicking the 'load' button on the right side of the UI interface in Google Colab and selecting the provided 'sdxl1_workflow.json' file.



๐Ÿš€ Fastest Method to Use SDXL with Comfy UI

This paragraph introduces the fastest method to use Stable Diffusion XL (SDXL) with Comfy UI, which is a user interface for running AI models. It explains the process of downloading and installing Comfy UI, including the portable Standalone version for Windows and the AMD GPU version for Linux. The speaker also guides viewers on updating their Comfy UI and how to load a pre-built SDXL configuration from the GitHub page. The summary highlights the ease of use, the ability to use multiple models simultaneously, and the process of setting up the Comfy UI canvas with a downloaded image for a quick start.


๐Ÿ›  Detailed Explanation of SDXL Rendering Process

The second paragraph delves into the technical aspects of rendering with SDXL using Comfy UI. It discusses the use of text prompts, the encoding process with specific models, and the rendering settings. The explanation includes the function of the CLIP text encoder, the role of the base and refiner models, and the significance of latent images versus pixel images in AI rendering. The paragraph also clarifies the difference between the rendering process in Comfy UI and Automatic 1111, emphasizing the efficiency and speed of the former. The summary provides insights into the AI rendering workflow, the use of the k-Sampler, and the steps involved in converting latent images to pixel images.


๐ŸŒ Using Google Colab for AI Rendering without a Powerful GPU

This paragraph addresses the solution for users without a high-performance GPU by demonstrating how to use Google Colab for AI rendering. It outlines the steps to connect to a GPU in Colab, the process of downloading and setting up the necessary models and tools, and the use of local tunnel for UI access. The speaker also discusses the cost implications of using Google Colab Pro Plan and the alternative of purchasing computing units for GPU time. The summary explains the ease of using Colab for AI rendering, the setup process, and the cost considerations for extended use.


๐ŸŽจ Rendering AI Images with SDXL on Google Colab

The final paragraph wraps up the tutorial by guiding viewers on how to render AI images using SDXL on Google Colab. It details the steps to load the SDXL workflow, select the base and refiner models, and input prompts for rendering. The speaker emphasizes the simplicity of the process and the ability to achieve high-quality, detailed images even while recording the video. The summary showcases the successful rendering of an AI image on a virtual server and invites viewers to subscribe for more content.



๐Ÿ’กSDXL 1.0

SDXL 1.0 refers to a specific version of a software or tool that is highlighted in the video for its super fast render times. It is a key component in the video's demonstration, showcasing how to achieve high-speed rendering in image processing. The script mentions using SDXL 1.0 in conjunction with Comfy UI for optimal results.

๐Ÿ’กComfy UI

Comfy UI is a user interface that simplifies the process of using complex software tools, such as SDXL 1.0. It is mentioned in the script as a means to make the utilization of advanced rendering techniques more accessible. The video guide explains how to install and use Comfy UI to enhance the rendering process.

๐Ÿ’กNvidia GPU

Nvidia GPU refers to a graphics processing unit developed by Nvidia Corporation, known for its high performance in graphics-intensive tasks. The script discusses the benefits of using an Nvidia GPU for accelerating render times, particularly with Comfy UI and SDXL 1.0.

๐Ÿ’กGoogle Colab

Google Colab is a cloud-based platform provided by Google that allows users to run Jupyter notebooks with various computing resources, including GPUs. The video script provides a guide on how to use Comfy UI within Google Colab, highlighting an alternative for those who may not have access to powerful local GPUs.


Rendering in the context of this video refers to the process of generating an image, frame, or animation from a model using computer graphics. The script emphasizes the speed of rendering with SDXL 1.0 and Comfy UI, noting that it takes only 9.3 seconds with a specific Nvidia GPU.


In the video, 'model' refers to the AI or machine learning models used in the rendering process. The script explains how to load and use different models, such as the base model and the refiner model, within Comfy UI for enhanced image generation.

๐Ÿ’กText Prompts

Text prompts are textual descriptions or commands that guide the AI in generating specific images. The script describes how to use positive and negative text prompts in the rendering process to direct the AI towards creating desired outcomes.

๐Ÿ’กCLIP Text Encoder

CLIP Text Encoder is a component mentioned in the script that encodes text prompts into a format that can be understood by the AI models. It plays a crucial role in the rendering process by translating the text prompts into a language the AI can process.

๐Ÿ’กLatent Image

A latent image in the context of AI and machine learning refers to a non-visual representation of an image, existing in a compressed or encoded form. The script explains that the rendering process with Comfy UI and SDXL 1.0 works with latent images, converting them into pixel images only at the final step.

๐Ÿ’กVAE Decoder

VAE Decoder stands for Variational Autoencoder Decoder, a part of the AI model responsible for converting latent images into pixel images. The script mentions the VAE Decoder as the final step in the rendering process, where the latent data is transformed into a visible image.

๐Ÿ’กGoogle Colab Pro Plan

The Google Colab Pro Plan is a subscription service that offers additional features and resources on the Google Colab platform, including access to more powerful GPUs. The script suggests this plan as an option for users who require more computational power for their rendering tasks.


The fastest method to use SDXL1.0 with render times as low as 9.3 seconds.

Comfy UI makes it easy to use SDXL1.0 even without a high-end Nvidia GPU.

Download and installation instructions for Comfy UI are straightforward, with a portable standalone version available for Windows.

Comfy UI includes an AMD GPU version for Linux users.

Instructions on updating Comfy UI to the latest version are provided.

Comfy UI examples provide powerful and mind-blowing note builds, including an SDXL build.

The canvas in Comfy UI allows for building and saving complex AI models as JSON files.

Beginners can benefit from the descriptive placeholders and titles in the Comfy UI canvas.

Multiple models can be used simultaneously in the same window for rendering.

Configuring model paths in the standalone Windows build is explained with a YAML file.

The rendering process in Comfy UI differs from Automatic 1111, utilizing latent images instead of pixel images.

The k-Sampler settings in Comfy UI replicate those in Automatic 1111, with customizable steps and end steps.

Google Colab can be used to render images with Comfy UI, even on less powerful hardware.

Google Colab Pro Plan offers access to more powerful GPUs for a subscription fee.

Instructions on setting up and using Comfy UI within Google Colab are provided.

Local tunnel installation is required for the UI interface within Google Colab.

A provided workflow file simplifies setting up the SDXL1.0 environment in Comfy UI on Google Colab.

Rendering with SDXL1.0 in Comfy UI on Google Colab yields high-quality images even during video recording.