https://blog.wongcw.com/2021/07/27/%e5%9c%8b%e7%94%a219nm-ddr4%e8%a8%98%e6%86%b6%e9%ab%94%e6%99%b6%e5%85%83%e8%89%af%e7%8e%87%e5%b7%b2%e9%81%9475-17nm%e5%b7%a5%e8%97%9d%e7%88%ac%e5%8d%87%e4%b8%ad/