AMD unveils Ryzen 4000 Series mobile processors January 6, 2020 https://betanews.com/2020/01/06/amd-ryzen-4000-mobile-cpu/ Neowin: AMD introduces Ryzen 4000 mobile, the world's first 7nm x86 notebook processors
AMD launches Ryzen Pro 4000 series to take on Intel’s vPro AMD promises new security features and big performance gains May 7, 2020 https://www.theverge.com/2020/5/7/21249346/amd-ryzen-pro-4000-business-processor-security-release