I recently came across 1x4gb 1600mhz RAM. My girlfriend's computer (i3/gtx650ti) Has 2x2gb RAM. I have installed the stick I found and it runs fine, but I was wondering how I should arrange the sticks. Should the 2x2gb be in dual channel and then the 4gb by itself, or stick one 2gb and the 4gb in dual channel and put the other 2gb by itself, or does it not matter at all? Thanks!