What is Dual Channel with RDram

I hear that rdram has an edge over DDR with the use of dual channel. What exactly does that mean and is there anyway special u have to set it up?

A dual channel memory comfiguration allows for data to travel along two lanes, so your system can begin loading a new stream of data before the previous stream has completed -resulting in generally less waiting time and faster access speeds.

You need a chipset and memory controller that is are able to make use of memory when used in a dual channel configuration.