Run MiniMax Video on 12GB VRAM: 3 Mins per 5s Clip with Audio
BeginningSpiritual49 · reddit · 2026-08-06
A developer shared a highly optimized recipe for running the MiniMax H3 video generation model on a 12GB VRAM RTX 5070 Ti laptop.
Key Optimization Techniques:
- Hybrid Split Sampling: Uses fast INT8 kernels for the first 10 steps, then toggles to a clean Triton backend for the final 2 finishing steps to prevent anatomy smearing.
- Extreme Quantization: Utilizes a pruned INT8 Convrot checkpoint paired with an NVFP4 AWQ text encoder.
- Attention & Sampling: Enables Sage attention, CFG distillation, and applies Spectrum (warmup 5, tail 1) only to the fast-stage model.
Result: Generates a 5-second video (480×832, 124 frames) with audio in 170 seconds (down from 11 minutes), achieving frame-identical quality to the clean render.
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