Guide: How to Optimize Performance on Any GPU

Complete optimization guide by VRAM tier

#GPU Tier Optimization

Low VRAM (4-6GB): GTX 1660, RTX 3050, RTX 4050

Settings:

Recommendations:

• →Use SD 1.5 ONLY
• →Max resolution: 512×512
• →Batch size: 1
• →Install Tiled VAE custom node
• →Steps: 20-25 max
• →Avoid SDXL completely

Medium VRAM (8-12GB): RTX 3060, RTX 4060

Settings:

Recommendations:

• →SDXL supported at 768×768
• →SD 1.5 at 768×768 or 1024×1024
• →Batch size: 1-2
• →Steps: 25-30
• →Use fp16 models when available

High VRAM (16-24GB): RTX 4080, RTX 4090

Settings:

Recommendations:

• →SDXL at 1024×1024 or higher
• →Batch size: 2-4
• →Steps: 30-50
• →High-res upscaling supported
• →Video generation supported
• →Multiple model loading

#Speed Optimization Tips

1. →

   Install xformers

   comfyui-workflow.json

   pip install xformers

   +20-30% speed boost

2. →

   Use NVIDIA GPU scheduling (Windows)

   • →NVIDIA Control Panel → Manage 3D Settings
   • →Low Latency Mode: Ultra
   • →Power Management: Prefer Maximum Performance
3. →

   Close background apps during generation

4. →

   Use SSD for model storage (not HDD)

5. →

   Keep drivers updated

#Related Guides

• →GPU and CUDA Errors
• →Model Types Explained
• →Custom Nodes Management