I have an Intel B85 chipset with Core I5-4570, and stuck in a spare 1x8GB with my existing 2x4GB and it still runs as dual channel. And I'm just curious how it works? Is it asynchronous dual-channel? Are the 2x4GB running in dual channel independently from the 1x8GB in single channel? Or is the memory controller pooling the 2x4GB in Channel A as a single 8GB, and thus the 8GB in Channel A and 8GB in Channel B are in synchronous dual channel?