https://blog.wongcw.com/2021/10/27/%e5%ae%9c%e9%bc%8e%e5%9c%8b%e9%9a%9b%e7%99%bc%e4%bd%88%e6%a5%b5%e9%99%90%e6%ba%ab%e5%ba%a6ddr4%e8%a8%98%e6%86%b6%e9%ab%94%ef%bc%9a%e4%bd%8e%e8%87%b3-40c%e3%80%81%e9%ab%98%e8%87%b3125c/