Testing Minimax H3 Locally: Turbo LoRA vs. INT8 VAE on RTX 4070
lazyspock · reddit · 2026-08-09
A developer conducted detailed local generation tests on the newly open-sourced MiniMax H3 video model using an RTX 4070 (12GB). Key findings include:
- Turbo LoRA: Significantly boosts generation speed (reducing steps to 6) but causes a noticeable drop in quality and disrupts text rendering. Best suited for rapid iteration rather than final production.
- VAE Comparison: At 0.3 MP resolution, Kijai's quantized INT8 VAE shows virtually no perceptible quality difference compared to the default FP16 VAE, which is highly beneficial for VRAM-constrained setups.
- Performance: On a 12GB GPU, generation times fluctuated between 95 and 180 seconds.
The author noted the rapid pace of recent optimizations and invited the community to share best practices for low-VRAM environments.
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