The memory controller on the 5600 series are capable of running two banks at 1333 speeds though.
Integrating the memory controller will both raise performance and reduce active power.
The nForce2 chipset was remarkable for its advanced memory controller.
Performance also depends on the quality of memory controllers.
In a typical computer there will only be a single memory controller with only one or two channels.
The C-chip is the control chip containing the memory controller.
To accomplish this, they needed to design an entirely new memory controller and bus.
Typically, a memory controller will require one or the other.
It includes a memory controller and 760 million transistors.
The two could co-exist within a system, but not within a memory controller.