https://blog.wongcw.com/2018/12/17/%e7%b4%ab%e5%85%89%e5%9c%8b%e5%be%ae%ef%bc%9a%e5%9c%8b%e7%94%a2ddr4%e5%85%a7%e5%ad%98%e9%96%8b%e7%99%bc%e5%b7%a5%e4%bd%9c%e5%9f%ba%e6%9c%ac%e5%ae%8c%e6%88%90%e7%94%a2%e8%83%bd%e4%be%9d%e7%84%b6/