Local Video Generation with ComfyUI, Minimax H3, and Nvidia Sol Engine

X postkeys 🧪Demo

Developer keys demonstrates running local video generation on an Nvidia DGX Spark system using ComfyUI and Minimax H3. Integrating Nvidia's Sol Engine reduced generation latency from 28.2 to 12.5 seconds per step.

Key points

  1. Local video generation runs on a single DGX Spark unit (DGX-Spark SM121) using ComfyUI.
  2. The setup utilises a Minimax H3 workflow.
  3. Initial generation speeds were measured at 28.2 seconds per step.
  4. Adding Nvidia's Sol Engine improved performance to 12.5 seconds per step for a City Hunter generation sample.
  5. The author linked to Nvidia's Sol Engine repository under nvlabs.github.io/Sana/Sol-Engine.

Why it matters

Running video generation models locally circumvents external API fees and hosted service limits. Optimisation tools such as Nvidia's Sol Engine deliver significant performance boosts, making local inference workflows practical on dedicated hardware.

Analysis

This post illustrates how modern generative video pipelines like Minimax H3 can achieve viable performance on standalone workstations. Achieving a more than 50 percent latency reduction highlights the critical importance of software-level inference optimisation on modern accelerator architectures.

Original post

keys 🧪

@u1tra_instinct · 5 August 2026

Unlimited video generation free all run locally on 1 DGX spark. with ComfyUI and Minimax H3 workflow. so fucking cool. Started out at 28.2 sec/step LFG, then i was able to get 12.5 sec/step for the City Hunter generation.... really impressed incorporated nvidia's Sol t.co/i6Baffn40J

88 likes9 replies108 bookmarks7k views

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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