https://blog.wongcw.com/2018/11/05/64-%e6%a0%b8%e5%bf%83-cpu-%e7%94%b1-81-dies-%e7%b5%84%e6%88%90-amd-%e7%ac%ac%e4%ba%8c%e4%bb%a3-epyc-%e8%99%95%e7%90%86%e5%99%a8%e5%b0%81%e8%a3%9d%e6%8e%a8%e6%b8%ac%e5%9c%96%e6%9b%9d%e5%85%89/