https://blog.wongcw.com/2020/07/18/%e9%a3%9b%e9%a8%b0%e9%a0%90%e5%91%8a%e5%9c%8b%e7%94%a2%e6%9c%8d%e5%8b%99%e5%99%a8cpu%ef%bc%9a8%e8%b7%af512%e6%a0%b8%e3%80%8116nm%e5%b7%a5%e8%97%9d%e3%80%818%e9%80%9a%e9%81%93ddr4/