https://blog.wongcw.com/2023/01/30/%e4%b8%89%e6%98%9f%e5%b7%b2%e9%80%a3%e7%ba%8c30%e5%b9%b4%e6%98%af%e5%85%a8%e7%90%83%e7%ac%ac1%e5%a4%a7dram%e5%bb%a0%e5%95%86%e9%80%a3%e7%ba%8c20%e5%b9%b4%e6%98%af%e6%9c%80%e5%a4%a7nand%e9%96%83/