It could be the mobile counterpart to the best consumer desktop CPU we’ve ever seen.

If the latest crop of rumors have any basis, AMD’s hotly anticipated Ryzen 5000 mobile CPU family could mix chips from old and new architectures, making shopping for a Ryzen-based laptop even more confusing.

According to a collection of leaks and reports, the mobile Ryzen 5000U series of APUs (CPUs with integrated graphics cores inside) are expected to include both “Lucienne” and “Cezanne” cores. Lucienne chips will reportedly be designed around AMD’s older Zen 2 architecture, and Cezanne around the more powerful Zen 3 architecture. 
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https://www.pcworld.com/article/3600197/amd-mobile-ryzen-5000-rumors-say-zen-2-and-zen-3-will-be-mixed.html