MiniMax H3 native 720p→1440p on one RTX 4090 via scheduled sparse attention
burritoresearch · reddit · 2026-08-30
An independent developer achieved native 720p to 1440p video generation with MiniMax H3 on a single RTX 4090 using a custom auto-scheduled sparse-attention system. Benchmarks show 5/10/15s videos taking 112/223/334s respectively. The system offers a 0-100 acceleration control, automatically allocating attention budgets across steps. The project is open-sourced.
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