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.