https://blog.wongcw.com/2019/03/18/%e5%a0%b1%e5%b0%8e%e7%a8%b1amd%e5%98%97%e8%a9%a6%e5%b0%87cpu%e8%88%87dram%e7%b3%bb%e7%b5%b1%e5%85%a7%e5%ad%98%e5%b0%81%e8%a3%9d%e5%88%b0%e4%b8%80%e8%b5%b7/