Running MiniMax H3 Video Generation on RTX 5070 Ti Incurs 240s Overhead
orlandogourmet66 · reddit · 2026-08-07
A developer encountered a severe performance bottleneck while running the MiniMax H3 Ref2Video model locally on an RTX 5070 Ti (16GB VRAM) with 32GB RAM.
When generating a 5-second / 0.4 MP / 20-step video, the actual sampling takes about 121 seconds, but the total execution time reaches 362 seconds. This means there is roughly 240 seconds of overhead outside the actual sampling. The logs indicate that MiniMax H3, the text encoder, and the VAE are prepared for Dynamic VRAM loading before every generation. The developer asks if this memory management overhead is normal for 32GB RAM and seeks optimization tips.
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