A while ago we posted a news item that AMD would be fabbing specific Windows 7 drivers based on a report from computerbase. As it turns out, that is not the case. Ryzen processors however are supported and working on Windows 7. 

Considering that the Ryzen 8-core parts do not have an Integrated GPU, it actually could make sense. It is AMD themselves that confirmed this rumor, AMD also states that they have tested and validated Ryzen processors on a variety of operating systems, including Windows 7.

"To achieve the highest confidence in the performance of our AMD Ryzen desktop processors (formerly code-named "Summit Ridge"), AMD validated them across two different OS generations, Windows 7 and 10," AMD said in a statement. "However, only support and drivers for Windows 10 will be provided in AMD Ryzen desktop processor production parts," the company added. Last August, Microsoft said that Intel’s Kaby Lake and AMD’s Ryzen chips will officially be supported only under the company’s flagship Windows 10 operating system.

“As new silicon generations are introduced, they will require the latest Windows platform at that time for support,” a Microsoft spokeswoman said last August. “This enables us to focus on deep integration between Windows and the silicon, while maintaining maximum reliability and compatibility with previous generations of platform and silicon.” 

Windows 10 is Microsoft’s most hip OS, with support for the latest APIs and drivers, a dedicated base of gamers has stuck with Windows 7. If AMD supplied Ryzen drivers for Windows 7, all would be well: Windows 7 users could continue to game on their older, stabler OS.
  

AMD Ryzen Won't Get Dedicated Windows 7 Drivers But Is fully Supported