Running Minimax H3 on 12GB VRAM: Speedup Workflows for Low-VRAM Video Generation
Support_Marmoset · reddit · 2026-08-10
A developer shared practical workflows and optimization experiences for running the Minimax H3 video generation model on low VRAM (RTX 3060 12GB).
- Optimization Strategy: Drops cache mechanisms in favor of Turbo Loras (like Lightx2v 4/6-step) and Sage Attention for speed, utilizing KJNodes for chunking to fit low VRAM.
- Performance: On 12GB VRAM, generating a 5-second, 16:9 video at 2mp resolution takes about 25 minutes; 8-second videos are currently limited to 1.4mp.
- Generation Tips: Recommends refining prompts with an LLM first, testing at low resolution, and then switching to high res, noting the model maintains good consistency.
- Shared Resources: Includes download links for the ComfyUI workflow, experimental W4a8 quantized model, and attention patches.
Related event: Challenges and Issues in Deploying MiniMax H3 on Low VRAM(3 posts)→
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