A memory system includes a memory hub controller coupled to a plurality of memory modules each of which includes a memory hub. The memory hub controller and the memory hubs each include at least one receiver that is synchronized to an internal clock signal during initialization. The memory hub controller...http://www.google.de/patents/US7222213?utm_source=gb-gplus-sharePatent US7222213 - System and method for communicating the synchronization status of memory modules during initialization of the memory modules
