https://community.amd.com/community/gaming/blog/2019/06/09/amd-powers-microsoft-project-scarlett

AMD and Microsoft have co-designed and co-engineered a custom, high performance AMD SoC to power Project Scarlett to deliver an incredible gaming experience,
including the next-generation of performance, graphics, lighting, visuals, and audio immersion.
This processor builds upon the significant innovation of the AMD Ryzen? "Zen 2" CPU core and a "Navi" GPU based on next-generation Radeon? RDNA gaming architecture including hardware-accelerated raytracing.