ComfyUI-DownscaleIRN

By alibof96View on GitHub →

A single-node ComfyUI module for Invertible Image Rescaling (IRN) that includes: automatic model download and discovery, BasicSR-based IRN_x2/x3/x4 loading, device/precision control, low-VRAM tiling, safe handling of non-divisible sizes, alpha channel preservation, and built-in bicubic/area fallback.

How much VRAM does ComfyUI-DownscaleIRN require?

Direct Answer: The ComfyUI node ComfyUI-DownscaleIRN requires a minimum base VRAM of 128MB and is optimized for GPUs with at least 4GB of VRAM. Low VRAM mode is fully supported for resource-constrained setups.

High (2-4GB)
Base VRAM:
128MB (0.1GB)
Recommended GPU:
4GB+ VRAM
Low VRAM Mode:
✓ Supported
Estimation Confidence:
MEDIUM

Interactive VRAM Compatibility Estimator

Estimated Total VRAM: 3.00 GBTarget: 8 GB
✅ Comfortable Fit

Your GPU has plenty of headroom. You can run this node safely with your active configurations!

Deploy on High-Performance GPUs

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🚀 Deploy on Vast.ai

Deploy on Cloud GPUs

Need more VRAM to run ComfyUI with this node? Rent low-cost, high-performance cloud GPUs on RunPod instantly.

🚀 Deploy on RunPod

What Python packages are required for ComfyUI-DownscaleIRN?

Direct Answer: Running ComfyUI-DownscaleIRN requires installing the following Python package dependencies: gdown, torch, torchvision. Ensure your ComfyUI environment has these packages active before launching.

requirements.txt
gdown
torch
torchvision

Interactive Setup & Dependency Resolver

Operating System:
Environment Type:
Run this terminal command in your ComfyUI root folder:
# Loading command...

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Frequently Asked Questions

How much VRAM does ComfyUI-DownscaleIRN require?

ComfyUI-DownscaleIRN requires a minimum of 128MB (0.1GB) of VRAM for base operation. For optimal performance, a GPU with at least 4GB of VRAM is recommended. This node supports low VRAM mode for resource-constrained setups.

Can I run ComfyUI-DownscaleIRN on an RTX 3060, RTX 4070, or RTX 4090?

✅ RTX 3060 (12GB): Yes, fully compatible with 10.7GB headroom. ✅ RTX 4070 (12GB): Yes, fully compatible with 10.7GB headroom. ✅ RTX 4070 Ti (16GB): Yes, fully compatible with 14.3GB headroom. ✅ RTX 4090 (24GB): Yes, fully compatible with 21.5GB headroom

What PyTorch version does ComfyUI-DownscaleIRN need?

ComfyUI-DownscaleIRN requires the following PyTorch-related packages: torch, torchvision. Ensure your ComfyUI environment has these installed. Ensure your PyTorch installation matches your CUDA version (use torch.version.cuda to check).

What Python packages are required for ComfyUI-DownscaleIRN?

To run ComfyUI-DownscaleIRN, you need to install: gdown, torch, torchvision. You can install these using pip or add them to your requirements.txt file.

How can I reduce VRAM usage when running ComfyUI-DownscaleIRN?

ComfyUI-DownscaleIRN supports low VRAM mode. To reduce memory usage: (1) Enable --lowvram or --medvram flags in ComfyUI, (2) Reduce batch size to 1, (3) Use fp16 or fp8 precision if supported, (4) Close other GPU applications.

How do I install ComfyUI-DownscaleIRN in ComfyUI?

To install ComfyUI-DownscaleIRN: (1) Navigate to your ComfyUI/custom_nodes directory, (2) Clone the repository: git clone https://github.com/alibof96/ComfyUI-DownscaleIRN, (3) Install dependencies: pip install -r requirements.txt (if present), (4) Restart ComfyUI. Alternatively, use ComfyUI Manager for one-click installation.