https://blog.wongcw.com/2021/05/11/%e4%b8%89%e6%98%9f%e6%8e%a8%e5%87%ba%e6%a5%ad%e5%85%a7%e9%a6%96%e6%ac%be%e6%94%af%e6%8c%81cxl%e4%ba%92%e9%80%a3%e6%96%b0%e6%a8%99%e6%ba%96%e7%9a%84ddr5%e5%85%a7%e5%ad%98%e6%a8%a1%e7%b5%84/