https://blog.wongcw.com/2018/10/18/7nm%e5%b7%a5%e8%89%ba%e5%85%a8%e6%96%b0%e6%9e%b6%e6%9e%84-amd-zen2%e7%90%86%e8%ae%ba%e6%80%a7%e8%83%bd%e6%8f%90%e5%8d%8713%ef%bc%85/