I'm building a computer and i've bought a single kingston 8gb 2400 ddr4, and i'm guessing if dual channel is really worth it, i plan to upgrade sooner to 16 gb (+1x8gb 2400 ddr4 kingston), but i heard it is not guaranteed they will operate in dual channel, even if i've bought a 2x4 set it will be the same if upgraded to 2x4 + 2x4, what is the difference in performence between 2x8 (or 4x4) rather than 1x8+1x8 (or 2x4 + 2x4), is it significant enough ?