MiniMax H3 on 32GB VRAM tops out at 7.2s of 2048x1152 video; 15s clips OOM
Glittering-Cold-2981 · reddit · 2026-10-08
A Reddit user benchmarks MiniMax H3 video generation on an AMD R9700 (32GB VRAM) with 128GB DDR4, using only Sage Attention 2.2 on Linux: max clip length is 7.2s at 2048x1152, taking 69 minutes for 20 steps (206s/it), with 90GB system RAM required. A 15s clip OOMs short by 3.31GB. They ask whether 48GB+ cards like the RTX 5090 or RTX 6000 Pro can handle it, sharing a sample output.
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