MiniMax H3 local video generation takes up to 58 minutes per clip

A 10-second 1920×1080 MiniMax H3 T2V render took 58 minutes on an RTX 5090 in ComfyUI (INT8, 20 steps, 24 FPS); a 864×480 render took 15m 50s on an RTX 5080. Users report quality is better at full resolution but want a good H3 upscaler.
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