https://blog.wongcw.com/2021/09/14/ddr5%e6%80%a7%e8%83%bd%e9%a6%96%e6%9b%9d%ef%bc%9a6400mhz%e8%ae%80%e5%8f%96%e9%a0%bb%e5%af%ac%e7%a0%b490gb-s%e3%80%81%e5%bb%b6%e9%81%b2%e8%b6%85%e9%ab%98/