Hello. I am considering getting some more memory. Currently, I am using g.skill Ripjaw ddr3 1600 memory, 2 sticks of 2bg. I was just browsing newegg and noticed that for the life of me, I can't find a 2gb stick of ripjaw memory that comes alone. Now, considering how cheap memory really is, I have no quarrels with going from 4-8 gigs of memory though I don't think I can make full use of it all. Now, here is my question. What is the difference between using 1 stick of 4gb memory, or 2 sticks of 2gb memory? As far as I have heard, it seems to be more common to use 2gb sticks, but I would like to be educated on this issue before I make any final purchases. Thanks.