Okay, so my question is whether there is any difference between having two 2x2 dual channel memory versus one 4x4 dual channel memory. Both would end up with 8 gigs, while one uses 4 slots and the other only 2 slots. For instance, I have the G.Skill Ripjaw 2x2 memory installed, and I am looking at upgrading to 8 gigs. Would simply buying another set to fill in my two remaining memory slots be the same as swapping out the 2x2 for 4x4 memory? This is of course assuming I have 4 memory slots supporting dual channel memory, and all other memory variables are kept constant.