https://blog.wongcw.com/2019/03/11/amd-7nm-navi%e8%b7%91%e5%88%86%e9%a6%96%e6%9b%9dpolaris%e5%8c%97%e6%a5%b5%e6%98%9f%e5%8d%87%e7%b4%9a%e7%89%88%e9%9d%a2%e5%90%91%e4%b8%bb%e6%b5%81/