I don't know if the below explanation of HyperTransport will help, but here it is:
AMD's HyperTransport technology: This technology is a faster speed point-to-point link designed to increase the communication speed between integrated circuits in computers. HyperTransport technology helps reduce the number of buses in a system, which can reduce system bottlenecks and enable today's processors to use system memory (Random Access Memory) more efficiently in high-end multiprocessor systems.