Hardware Secrets posted Everything You Need to Know About Dual Channel

The system RAM memory prevents the PC of achieving its maximum capable performance. This happens because the processor (CPU) is faster than RAM memory and usually it has to wait for the RAM memory to deliver data. During this wait time the CPU is idle, doing nothing (that's not absolutely true, but it fits in our explanation). In a perfect computer, the RAM memory would be as fast as the CPU. Dual channel is a technique used to double the communication speed between the memory controller and the RAM memory, and thus improving the system performance. In this tutorial we will explain everything you need to know about dual channel technology: how it works, how to set it up, how to calculate transfer speeds and more.

Everything You Need to Know About Dual Channel