It is the motherboard that determines single/dual/triple/quad channel ram operation.
I suspect your real question is if I have 4 sticks of ram and insert them into the 4 slots of a dual channel motherboard, what do I get.
If the sticks play well together(they were bought in a single kit) then you will have dual channel operation.
If they do not play well together, you probably will have 2 sticks that are unusable.