Running the LTX 2.3 Video Model Locally in ComfyUI on an RTX 3090

Melvin Vivas · X post · 2026-03-08 · Open on X

Topics: AI Dev Tools & Productivity, Industry Trends & Job Market · Level: intermediate

Summary

The creator runs the LTX 2.3 video generation model locally in ComfyUI on one consumer RTX 3090 GPU. It shows that open video models can run on consumer hardware.

Key points

• LTX 2.3 (a video generation model) runs locally through ComfyUI.
• The hardware used is one RTX 3090 (24 GB VRAM), a consumer GPU.

Resources mentioned

• LTX 2.3 · tool · huggingface.co · free
  A video generation model from LTX (Lightricks) that makes video from text or images, including start- and end-frame image-to-video, with audio, portrait output and 24/48 fps.
  Also in: Free Local AI Video Generation with LTX 2.3 in ComfyUI (Melvin Vivas on X · notes), Local Video Generation with LTX 2.3 on an RTX 3090 (Melvin Vivas on X · notes), AI Video Generation Locally with ComfyUI and LTX 2.3 (Melvin Vivas on X · notes), LTX 2.3 Image-to-Video Running Locally (Demo) (Melvin Vivas on X · notes) and 3 more
• 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

Try this

• Generate videos locally with LTX 2.3 in ComfyUI on a 24 GB GPU