What I think is funny that the Obvious solution he is not willing to try ,Seriously dude what is stopping you from just picking up a matching pair of 4 GB or even 8
Does your board happen to be limited ? If not either your Internet has something to do with online and off line play or simple you need the ram
I bet you your bottom dollar you check your resource and ram you will be dragging it all trying to play that game when you can just end this silly charade
GO GET YOUR RAM !