Free Local AI Image Generation with ComfyUI on Your Own GPU

Melvin Vivas · X post · 2026-03-01 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

The creator suggests running image generation locally instead of paying for a hosted service: buy a GPU and install ComfyUI. He runs it on an NVIDIA RTX 3090.

Key points

• After you buy the hardware, ComfyUI lets you generate images locally with no per-image fees.
• The creator runs ComfyUI on an NVIDIA RTX 3090 (24 GB VRAM).
• The main cost is the one-time GPU purchase, not a subscription.

Resources mentioned

• ComfyUI · tool · x.com · free
  The official X account for ComfyUI, the node-based tool for generative AI workflows, which announces things like ComfyUI Agent.
  Also in: ComfyUI Agent: early access announcement (Melvin Vivas on X · notes), Comfy Router: One API for Image, Video, 3D and Audio Model Providers (Melvin Vivas on X · notes), Generating AI Video Locally with MiniMax H3 in ComfyUI on an RTX 3090 (Melvin Vivas on X · notes), Running MiniMax M3 Locally in ComfyUI on an RTX 3090 (Melvin Vivas on X · notes) and 23 more
• NVIDIA GeForce RTX 3090 · tool · nvidia.com · paid
  Consumer GPU with 24 GB of VRAM, used here to run a long-context LLM locally.
  Also in: Portable Computer Now Runs AI Agents and Models Locally on NVIDIA RTX PCs (Melvin Vivas on X · notes), Long-Context Local LLM on an RTX 3090: .env Config and ~64 tok/s Benchmark (Melvin Vivas on X · notes), Running Ornith-1.5-35B-A3B (Q4_K_M) at 128k Context on an RTX 3090 with llama.cpp (Melvin Vivas on X · notes), Generating AI Video Locally with MiniMax H3 in ComfyUI on an RTX 3090 (Melvin Vivas on X · notes) and 2 more

Try this

• Get a capable GPU (e.g. an RTX 3090) and install ComfyUI to generate images locally.