Good news PC players. It seems that Activision has reconsidered the absurd requisite of having 6GB of RAM to play Call of Duty: Ghosts and with a new update you will only need 4GB. Moreover, this new update adds new features such as the broadcasting mode and the eSports rules to play like a pro does.
Official Source: http://mp1st.com/2013/11/18/call-duty-ghosts-pc-patch-reduced-6gb-ram-requirement-adds-broadcaster-mode-esports-rules/