Design Hub

Dec 27, 2025 · Artificial Intelligence

Speed vs. Quality: Z-Image + Nunchaku Boosts Portrait Generation by 300%

Testing shows that adding the open‑source Nunchaku accelerator to the Z‑Image portrait model triples generation speed on an RTX 4090, but the faster output exhibits noticeable drops in facial detail and overall aesthetic, prompting a detailed walkthrough of installation, model download, and workflow integration.