https://blog.wongcw.com/2018/11/07/amd-zen-2%e6%9e%b6%e6%a7%8b%e8%a7%a3%e6%9e%90%ef%bc%9a7nm%e5%8a%a0%e6%8c%81%e5%90%9e%e5%90%90%e7%bf%bb%e7%95%aa/