Testing Hunyuan Video on RTX 5090: Workflows for 1080p Generation and Upscaling
DoskvolDenizen · reddit · 2026-08-07
A developer detailed their workflow for generating 15-second 1080p videos using the Hunyuan (H3) model on an RTX 5090.
- Low-Quality Iteration: Using Kijai's memory-efficient nodes and EasyCache while reducing steps to 10 significantly cuts render time (0.5MP drops from 750s to 183s) without drastically altering motion.
- High-Quality Render: 1MP at 20 steps without optimizations takes 35 minutes, while 0.5MP takes 11 minutes.
- Upscaling: Tested RTX Super Resolution and SeedVR2. SeedVR2 upscaling from 0.5MP to 1080p yielded poor results with noticeable batch transitions; rendering natively at 1MP plus RTX SR provided better fidelity.
- Pain Point: Iterating quickly at low quality (0.5-0.8MP) is not perfectly representative of the final 1MP high-quality render's motion.
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