ComfyUI is a powerful tool for AI-driven image generation, offering flexibility and control over workflows. In this article, we’ll walk you through the process of installing ComfyUI on a Windows machine, including system requirements, installation steps, and troubleshooting tips.
Table of Contents
System Requirements
Before diving into the installation process, ensure your system meets the following hardware and software prerequisites:
Hardware Requirements
- Processor: Modern multi-core CPU (Intel i5/i7 or AMD Ryzen recommended).
- GPU: NVIDIA GPU with CUDA support (minimum 6GB VRAM, though 8GB+ VRAM is ideal for better performance). Examples include:
- NVIDIA GTX 1660 or higher
- NVIDIA RTX 3060/3070/3080/40-series/50-series GPUs
- NVIDIA A-series, Tesla series GPUs
Software Requirements
- Operating System: Windows 10 or Windows 11 (64-bit).
- Python Version: Python 3.10 or later.
- NVIDIA Drivers: Ensure the latest drivers are installed for CUDA compatibility.
- Download from NVIDIA’s Driver Downloads.
- Install NVIDIA cuda:
- Git: Git must be installed for cloning the repository.
- Download from Git for Windows.
Step-by-Step Guide to Installing ComfyUI on Windows
Follow the steps below to install ComfyUI on your Windows machine:
Step 1: Download Comfyui Desktop version
Download ComfyUI for Windows/Mac
Step 2: Install Git
- Download Git from Git for Windows.
- Follow the installation instructions and ensure Git is added to your system’s PATH.
Step 3: Start the desktop version installation
- Double click the downloaded version to get started with the Comfyui installation
Select the GPU version
Choose the installation location:
Getting started with a Template
Missing module:
Which can be downloaded directly by clicking download.
Step 4: Run ComfyUI
Step 5: Try use the default prompt and default model to generate an image
When click run, it pop up an error.
Full error below:
ComfyUI Error Report
Error Details
- Node ID: 7
- Node Type: CLIPTextEncode
- Exception Type: RuntimeError
- Exception Message: CUDA error: operation not supported
CUDA kernel errors might be asynchronously reported at some other API call, so the stacktrace below might be incorrect.
For debugging consider passing CUDA_LAUNCH_BLOCKING=1
Compile withTORCH_USE_CUDA_DSAto enable device-side assertions.
Stack Trace
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 327, in execute
output_data, output_ui, has_subgraph = get_output_data(obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 202, in get_output_data
return_values = _map_node_over_list(obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 174, in _map_node_over_list
process_inputs(input_dict, i)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 163, in process_inputs
results.append(getattr(obj, func)(**inputs))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\nodes.py", line 69, in encode
return (clip.encode_from_tokens_scheduled(tokens), )
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 153, in encode_from_tokens_scheduled
pooled_dict = self.encode_from_tokens(tokens, return_pooled=return_pooled, return_dict=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 214, in encode_from_tokens
self.load_model()
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 247, in load_model
model_management.load_model_gpu(self.patcher)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 604, in load_model_gpu
return load_models_gpu([model])
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 599, in load_models_gpu
loaded_model.model_load(lowvram_model_memory, force_patch_weights=force_patch_weights)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 418, in model_load
self.model_use_more_vram(use_more_vram, force_patch_weights=force_patch_weights)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 447, in model_use_more_vram
return self.model.partially_load(self.device, extra_memory, force_patch_weights=force_patch_weights)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 832, in partially_load
raise e
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 829, in partially_load
self.load(device_to, lowvram_model_memory=current_used + extra_memory, force_patch_weights=force_patch_weights, full_load=full_load)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 670, in load
x[2].to(device_to)
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 1343, in to
return self._apply(convert)
^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 930, in _apply
param_applied = fn(param)
^^^^^^^^^
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 1329, in convert
return t.to(
^^^^^
System Information
- ComfyUI Version: 0.3.27
- Arguments: C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\main.py –user-directory C:\Users\johnlu\Documents\ComfyUI\user –input-directory C:\Users\johnlu\Documents\ComfyUI\input –output-directory C:\Users\johnlu\Documents\ComfyUI\output –front-end-root C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\web_custom_versions\desktop_app –base-directory C:\Users\johnlu\Documents\ComfyUI –extra-model-paths-config C:\Users\johnlu\AppData\Roaming\ComfyUI\extra_models_config.yaml –log-stdout –listen 127.0.0.1 –port 8000 –cuda-malloc
- OS: nt
- Python Version: 3.12.9 (main, Feb 12 2025, 14:52:31) [MSC v.1942 64 bit (AMD64)]
- Embedded Python: false
- PyTorch Version: 2.6.0+cu126
Devices
- Name: cuda:0 Tesla T4 : cudaMallocAsync
- Type: cuda
- VRAM Total: 16998400000
- VRAM Free: 16883515392
- Torch VRAM Total: 0
- Torch VRAM Free: 0
Logs
2025-04-08T15:48:17.454346 - Adding extra search path custom_nodes C:\Users\johnlu\Documents\ComfyUI\custom_nodes
2025-04-08T15:48:17.454346 - Adding extra search path download_model_base C:\Users\johnlu\Documents\ComfyUI\models
2025-04-08T15:48:17.454346 - Adding extra search path custom_nodes C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\custom_nodes
2025-04-08T15:48:17.454346 - Setting output directory to: C:\Users\johnlu\Documents\ComfyUI\output
2025-04-08T15:48:17.454346 - Setting input directory to: C:\Users\johnlu\Documents\ComfyUI\input
2025-04-08T15:48:17.454346 - Setting user directory to: C:\Users\johnlu\Documents\ComfyUI\user
2025-04-08T15:48:18.475926 - [START] Security scan2025-04-08T15:48:18.475926 -
2025-04-08T15:48:20.110481 - [DONE] Security scan2025-04-08T15:48:20.110481 -
2025-04-08T15:48:20.282310 - ## ComfyUI-Manager: installing dependencies done.2025-04-08T15:48:20.282310 -
2025-04-08T15:48:20.282310 - ** ComfyUI startup time:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - 2025-04-08 15:48:20.2822025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.283408 - ** Platform:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - Windows2025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.283408 - ** Python version:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - 3.12.9 (main, Feb 12 2025, 14:52:31) [MSC v.1942 64 bit (AMD64)]2025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.283408 - ** Python executable:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - C:\Users\johnlu\Documents\ComfyUI\.venv\Scripts\python.exe2025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.283408 - ** ComfyUI Path:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI2025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.283408 - ** ComfyUI Base Folder Path:2025-04-08T15:48:20.283408 - 2025-04-08T15:48:20.283408 - C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI2025-04-08T15:48:20.283408 -
2025-04-08T15:48:20.284409 - ** User directory:2025-04-08T15:48:20.284409 - 2025-04-08T15:48:20.284409 - C:\Users\johnlu\Documents\ComfyUI\user2025-04-08T15:48:20.284409 -
2025-04-08T15:48:20.284409 - ** ComfyUI-Manager config path:2025-04-08T15:48:20.284409 - 2025-04-08T15:48:20.284409 - C:\Users\johnlu\Documents\ComfyUI\user\default\ComfyUI-Manager\config.ini2025-04-08T15:48:20.284409 -
2025-04-08T15:48:20.284409 - ** Log path:2025-04-08T15:48:20.284409 - 2025-04-08T15:48:20.284409 - C:\Users\johnlu\Documents\ComfyUI\user\comfyui.log2025-04-08T15:48:20.284409 -
2025-04-08T15:48:21.487359 - [ComfyUI-Manager] Failed to restore comfyui-frontend-package
2025-04-08T15:48:21.488359 - expected str, bytes or os.PathLike object, not NoneType
2025-04-08T15:48:21.488359 -
Prestartup times for custom nodes:
2025-04-08T15:48:21.488359 - 4.0 seconds: C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\custom_nodes\ComfyUI-Manager
2025-04-08T15:48:21.488359 -
2025-04-08T15:48:24.067518 - Checkpoint files will always be loaded safely.
2025-04-08T15:48:24.334030 - Total VRAM 16211 MB, total RAM 28621 MB
2025-04-08T15:48:24.334030 - pytorch version: 2.6.0+cu126
2025-04-08T15:48:24.335032 - Set vram state to: NORMAL_VRAM
2025-04-08T15:48:24.335032 - Device: cuda:0 Tesla T4 : cudaMallocAsync
2025-04-08T15:48:26.143597 - Using pytorch attention
2025-04-08T15:48:40.382150 - ComfyUI version: 0.3.27
2025-04-08T15:48:40.411434 - [Prompt Server] web root: C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\web_custom_versions\desktop_app
2025-04-08T15:48:40.961457 - ### Loading: ComfyUI-Manager (V3.30.4)
2025-04-08T15:48:40.962576 - [ComfyUI-Manager] network_mode: public
2025-04-08T15:48:40.962576 - ### ComfyUI Revision: UNKNOWN (The currently installed ComfyUI is not a Git repository)
2025-04-08T15:48:40.969744 -
Import times for custom nodes:
2025-04-08T15:48:40.970746 - 0.0 seconds: C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\custom_nodes\websocket_image_save.py
2025-04-08T15:48:40.970746 - 0.0 seconds: C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\custom_nodes\ComfyUI-Manager
2025-04-08T15:48:40.970746 -
2025-04-08T15:48:40.983759 - Starting server
2025-04-08T15:48:40.983759 - To see the GUI go to: http://127.0.0.1:8000
2025-04-08T15:48:41.021278 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/alter-list.json
2025-04-08T15:48:41.072414 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json
2025-04-08T15:48:41.083425 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/model-list.json
2025-04-08T15:48:41.251921 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/extension-node-map.json
2025-04-08T15:48:41.278533 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/github-stats.json
2025-04-08T15:48:45.322464 - FETCH ComfyRegistry Data: 5/812025-04-08T15:48:45.322464 -
2025-04-08T15:48:46.865258 - got prompt
2025-04-08T15:48:48.766125 - model weight dtype torch.float16, manual cast: None
2025-04-08T15:48:48.768124 - model_type EPS
2025-04-08T15:48:49.127022 - Using pytorch attention in VAE
2025-04-08T15:48:49.129024 - Using pytorch attention in VAE
2025-04-08T15:48:49.181575 - VAE load device: cuda:0, offload device: cpu, dtype: torch.float32
2025-04-08T15:48:49.331280 - CLIP/text encoder model load device: cuda:0, offload device: cpu, current: cpu, dtype: torch.float16
2025-04-08T15:48:49.375641 - Requested to load SD1ClipModel
2025-04-08T15:48:49.383639 - !!! Exception during processing !!! CUDA error: operation not supported
CUDA kernel errors might be asynchronously reported at some other API call, so the stacktrace below might be incorrect.
For debugging consider passing CUDA_LAUNCH_BLOCKING=1
Compile with `TORCH_USE_CUDA_DSA` to enable device-side assertions.
2025-04-08T15:48:49.496959 - Traceback (most recent call last):
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 327, in execute
output_data, output_ui, has_subgraph = get_output_data(obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 202, in get_output_data
return_values = _map_node_over_list(obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 174, in _map_node_over_list
process_inputs(input_dict, i)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\execution.py", line 163, in process_inputs
results.append(getattr(obj, func)(**inputs))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\nodes.py", line 69, in encode
return (clip.encode_from_tokens_scheduled(tokens), )
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 153, in encode_from_tokens_scheduled
pooled_dict = self.encode_from_tokens(tokens, return_pooled=return_pooled, return_dict=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 214, in encode_from_tokens
self.load_model()
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\sd.py", line 247, in load_model
model_management.load_model_gpu(self.patcher)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 604, in load_model_gpu
return load_models_gpu([model])
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 599, in load_models_gpu
loaded_model.model_load(lowvram_model_memory, force_patch_weights=force_patch_weights)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 418, in model_load
self.model_use_more_vram(use_more_vram, force_patch_weights=force_patch_weights)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_management.py", line 447, in model_use_more_vram
return self.model.partially_load(self.device, extra_memory, force_patch_weights=force_patch_weights)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 832, in partially_load
raise e
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 829, in partially_load
self.load(device_to, lowvram_model_memory=current_used + extra_memory, force_patch_weights=force_patch_weights, full_load=full_load)
File "C:\Users\johnlu\AppData\Local\Programs\@comfyorgcomfyui-electron\resources\ComfyUI\comfy\model_patcher.py", line 670, in load
x[2].to(device_to)
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 1343, in to
return self._apply(convert)
^^^^^^^^^^^^^^^^^^^^
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 930, in _apply
param_applied = fn(param)
^^^^^^^^^
File "C:\Users\johnlu\Documents\ComfyUI\.venv\Lib\site-packages\torch\nn\modules\module.py", line 1329, in convert
return t.to(
^^^^^
RuntimeError: CUDA error: operation not supported
CUDA kernel errors might be asynchronously reported at some other API call, so the stacktrace below might be incorrect.
For debugging consider passing CUDA_LAUNCH_BLOCKING=1
Compile with `TORCH_USE_CUDA_DSA` to enable device-side assertions.
2025-04-08T15:48:49.499967 - Prompt executed in 2.63 seconds
Attached Workflow
Please make sure that workflow does not contain any sensitive information such as API keys or passwords.
{"id":"1c97d1fb-9290-4010-b7ba-774ce8c5025d","revision":0,"last_node_id":10,"last_link_id":11,"nodes":[{"id":8,"type":"VAEDecode","pos":[1209,188],"size":[210,46],"flags":{},"order":5,"mode":0,"inputs":[{"localized_name":"samples","name":"samples","type":"LATENT","link":7},{"localized_name":"vae","name":"vae","type":"VAE","link":8}],"outputs":[{"localized_name":"IMAGE","name":"IMAGE","type":"IMAGE","slot_index":0,"links":[9]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"VAEDecode"},"widgets_values":[]},{"id":3,"type":"KSampler","pos":[863,186],"size":[315,262],"flags":{},"order":4,"mode":0,"inputs":[{"localized_name":"model","name":"model","type":"MODEL","link":1},{"localized_name":"positive","name":"positive","type":"CONDITIONING","link":4},{"localized_name":"negative","name":"negative","type":"CONDITIONING","link":6},{"localized_name":"latent_image","name":"latent_image","type":"LATENT","link":2}],"outputs":[{"localized_name":"LATENT","name":"LATENT","type":"LATENT","slot_index":0,"links":[7]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"KSampler"},"widgets_values":[139106886374201,"randomize",20,8,"euler","normal",1]},{"id":9,"type":"SaveImage","pos":[1443.2308349609375,194.8274383544922],"size":[210,270],"flags":{},"order":6,"mode":0,"inputs":[{"localized_name":"images","name":"images","type":"IMAGE","link":9}],"outputs":[],"properties":{"cnr_id":"comfy-core","ver":"0.3.27"},"widgets_values":["ComfyUI"]},{"id":5,"type":"EmptyLatentImage","pos":[519.6195068359375,635.2233276367188],"size":[315,106],"flags":{},"order":0,"mode":0,"inputs":[],"outputs":[{"localized_name":"LATENT","name":"LATENT","type":"LATENT","slot_index":0,"links":[2]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"EmptyLatentImage"},"widgets_values":[512,512,1]},{"id":4,"type":"CheckpointLoaderSimple","pos":[32.79865264892578,180.68646240234375],"size":[315,98],"flags":{},"order":1,"mode":0,"inputs":[],"outputs":[{"localized_name":"MODEL","name":"MODEL","type":"MODEL","slot_index":0,"links":[1]},{"localized_name":"CLIP","name":"CLIP","type":"CLIP","slot_index":1,"links":[5,10]},{"localized_name":"VAE","name":"VAE","type":"VAE","slot_index":2,"links":[8]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"CheckpointLoaderSimple"},"widgets_values":["v1-5-pruned-emaonly.ckpt"]},{"id":7,"type":"CLIPTextEncode","pos":[413,389],"size":[425.27801513671875,180.6060791015625],"flags":{},"order":2,"mode":0,"inputs":[{"localized_name":"clip","name":"clip","type":"CLIP","link":5}],"outputs":[{"localized_name":"CONDITIONING","name":"CONDITIONING","type":"CONDITIONING","slot_index":0,"links":[6]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"CLIPTextEncode"},"widgets_values":["text, watermark"]},{"id":6,"type":"CLIPTextEncode","pos":[412.3878479003906,172.93951416015625],"size":[422.84503173828125,164.31304931640625],"flags":{},"order":3,"mode":0,"inputs":[{"localized_name":"clip","name":"clip","type":"CLIP","link":10}],"outputs":[{"localized_name":"CONDITIONING","name":"CONDITIONING","type":"CONDITIONING","slot_index":0,"links":[4]}],"properties":{"cnr_id":"comfy-core","ver":"0.3.27","Node name for S&R":"CLIPTextEncode"},"widgets_values":["beautiful scenery nature glass bottle landscape, , purple galaxy bottle,"]}],"links":[[1,4,0,3,0,"MODEL"],[2,5,0,3,3,"LATENT"],[4,6,0,3,1,"CONDITIONING"],[5,4,1,7,0,"CLIP"],[6,7,0,3,2,"CONDITIONING"],[7,3,0,8,0,"LATENT"],[8,4,2,8,1,"VAE"],[9,8,0,9,0,"IMAGE"],[10,4,1,6,0,"CLIP"]],"groups":[],"config":{},"extra":{"ds":{"scale":1.0296149546827795,"offset":[-17.644182606615267,7.129192296914338]}},"version":0.4}
Then after investigation, I found the issue was mentioned in github:
Desktop ComfyUI (Windows) executable won’t accept parameters on it’s commandline · Issue #7087 · comfyanonymous/ComfyUI
Mitigation:
Mitigation is set “Use CUDA malloc for memory allocation” to disable .
Step 6: Generate the image
After solving the issue and click run again, I can finally generate the image.
Verifying Installation
To ensure ComfyUI is properly installed and working:
- Test basic workflows by generating sample images.
- Check GPU utilization using tools like Task Manager or NVIDIA-SMI to confirm GPU acceleration is active.
Troubleshooting Common Issues
Issue 1: Python Not Recognized
- Ensure Python is added to your PATH during installation.
- If not, manually add the Python directory to your PATH via Environment Variables.
Issue 2: CUDA Compatibility Errors
- Verify that your NVIDIA drivers and CUDA toolkit are up-to-date.
- Check the compatibility of your GPU with the installed CUDA version.
Conclusion
By following this guide, you should now have ComfyUI successfully installed and running on your Windows machine. With its intuitive interface and powerful features, you’re ready to explore AI-driven image generation workflows.
Next Article
In the next article, let’s navigate the ComfyUI interface together. We’ll explore shortcuts and operations to help you become familiar with the platform and maximize its potential. Stay tuned!