Flux Dev Magic: Generate Images in SECONDS with Low VRAM!

Date Updated: 25 Mars 2025

Prerequisites

python 3.11 or 3.11
pyTorch 2.6

1 . Check Python Version

python --version

2 . Fresh ComfyUI Installation Process

git clone https://github.com/comfyanonymous/ComfyUI.git
cd ComfyUI

Check your Cuda version: nvcc --version
Download Pytorch:
https://pytorch.org/get-started/locally/

pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu124

pip install -r requirements.txt

3 . Nunchaku Wheels

All Nunchaku Wheels: https://huggingface.co/mit-han-lab/nunchaku/tree/main

for torch 2.6 python 3.11

pip install https://huggingface.co/mit-han-lab/nunchaku/resolve/main/nunchaku-0.1.4%2Btorch2.6-cp311-cp311-win_amd64.whl

for torch 2.6 python 3.11

pip install https://huggingface.co/mit-han-lab/nunchaku/resolve/main/nunchaku-0.1.4%2Btorch2.6-cp312-cp312-win_amd64.whl

4 . Custom Nodes

cd custom_nodes
git clone https://github.com/ltdrdata/ComfyUI-Manager comfyui-manager

cd custom_nodes
git clone https://github.com/ltdrdata/ComfyUI-Manager comfyui-manager

git clone https://github.com/mit-han-lab/ComfyUI-nunchaku
cd ComfyUI-nunchaku
pip install -r requirements.txt

SVDQuants Models

All Models: https://huggingface.co/collections/mit-han-lab/svdquant-67493c2c2e62a1fc6e93f45c

pip install -U "huggingface_hub[cli]"

Before you download the models make sure you’re inside ComfyUI main folder.

1 . Flux Dev CLips and VAE

huggingface-cli download comfyanonymous/flux_text_encoders clip_l.safetensors --local-dir models/text_encoders
huggingface-cli download comfyanonymous/flux_text_encoders t5xxl_fp16.safetensors --local-dir models/text_encoders
huggingface-cli download black-forest-labs/FLUX.1-schnell ae.safetensors --local-dir models/vae

2 . Flux1 Dev SVDQuant Int4

huggingface-cli download mit-han-lab/svdq-int4-flux.1-dev --local-dir models/diffusion_models/svdq-int4-flux.1-dev

3 . Flux1 Dev SVDQuant Int4

huggingface-cli download mit-han-lab/svdq-int4-flux.1-fill-dev --local-dir models/diffusion_models/svdq-int4-flux.1-fill-dev

Flux Dev SVDQuant Workflow

SVDQuant

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