https://qooah.com/2012/10/07/%e6%b2%92%e6%9c%89%e6%9c%80%e5%a4%9a%e5%8f%aa%e6%9c%89%e6%9b%b4%e5%a4%9a%ef%bc%8csamsung-%e6%8e%a8%e5%87%ba-3gb-ram-%e6%99%ba%e8%83%bd%e6%89%8b%e6%a9%9f/