I just got my first desktop Mac, a 2012 i5 Mac mini with 4GB of RAM. I thought this would be enough, because my 2010 MBA has 4GB RAM and it has never been an issue for my usage (internet, netflix, word processing, etc. No games). However after a couple of days with my mini, its obvious that I need more RAM, even though I use it for the same things as my MBA. How is it that 2 computers which are basically identical, the difference being my MBA is a Core 2 Duo, and my Mini an i5, can use RAM so differently?