So I have asus z68 mobo and currently I have 8GB and some of you may say not to upgrade any higher but I currently have 2x4GB kingston hyperx 1600mhz in dual channel and I have 4 slots, so if I was to add another 2 sticks of the same make would I lose the dual channel benefit or wouldn't it matter since I have 16gb of ram or would I get improved performance because there would be 2x dual channel memory?