https://blog.wongcw.com/2020/10/15/%e5%be%9e%e6%9c%aa%e7%99%bc%e5%b8%83%e7%9a%84amd%e4%b8%83%e4%bb%a3apu-a9-9820%e9%87%8d%e7%8f%be%e6%b1%9f%e6%b9%96%ef%bc%9a8%e6%a0%b8%e5%bf%83%e3%80%81%e6%94%af%e6%8c%81ddr3/