https://blog.wongcw.com/2018/11/09/amd%e9%a6%96%e7%99%bc%e4%ba%867nm%e5%b7%a5%e8%97%9d%e7%9a%84vega%e9%a1%af%e5%8d%a1nvidia%e6%98%8e%e5%b9%b4%e4%b9%9f%e8%a6%81%e6%8e%a87nm-gpu/