ComfyUI-SAM3

By PozzettiAndreaView on GitHub →

ComfyUI integration for Meta's SAM3 model enabling open-vocabulary image segmentation using natural language text prompts, with automatic model download, geometric refinement, and flexible confidence thresholds.

How much VRAM does ComfyUI-SAM3 require?

Direct Answer: The ComfyUI node ComfyUI-SAM3 requires a minimum base VRAM of 256MB 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:
256MB (0.3GB)
Recommended GPU:
4GB+ VRAM
Low VRAM Mode:
✓ Supported
Estimation Confidence:
HIGH

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!

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What Python packages are required for ComfyUI-SAM3?

Direct Answer: Running ComfyUI-SAM3 requires installing the following Python package dependencies: comfy-3d-viewers==0.2.44, comfy-env==0.3.89. Ensure your ComfyUI environment has these packages active before launching.

requirements.txt
comfy-3d-viewers==0.2.44
comfy-env==0.3.89

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-SAM3 require?

ComfyUI-SAM3 requires a minimum of 256MB (0.3GB) 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-SAM3 on an RTX 3060, RTX 4070, or RTX 4090?

✅ RTX 3060 (12GB): Yes, fully compatible with 10.6GB headroom. ✅ RTX 4070 (12GB): Yes, fully compatible with 10.6GB headroom. ✅ RTX 4070 Ti (16GB): Yes, fully compatible with 14.2GB headroom. ✅ RTX 4090 (24GB): Yes, fully compatible with 21.4GB headroom

What Python packages are required for ComfyUI-SAM3?

To run ComfyUI-SAM3, you need to install: comfy-3d-viewers==0.2.44, comfy-env==0.3.89. You can install these using pip or add them to your requirements.txt file.

How can I reduce VRAM usage when running ComfyUI-SAM3?

ComfyUI-SAM3 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-SAM3 in ComfyUI?

To install ComfyUI-SAM3: (1) Navigate to your ComfyUI/custom_nodes directory, (2) Clone the repository: git clone https://github.com/PozzettiAndrea/ComfyUI-SAM3, (3) Install dependencies: pip install -r requirements.txt (if present), (4) Restart ComfyUI. Alternatively, use ComfyUI Manager for one-click installation.