What is dual channel memory?

Answer 1

It is a technology that theoretically doubles data throughput from the memory to the

memory controller.

The motherboard has memory slots and if not using all four slots, then they must be placed in a certain configuration for it to use dual channels.

Your motherboard manual has the configuration of memory and slot placement

for this to work.

If running dual, it is best to buy memory that is designed as a pair or a set

to get the most efficiency, it usually says, dual channel kit.