1. A memory apparatus for use with a system, the memory apparatus comprising: a plurality of physical memory circuits; a component coupled to the plurality of physical memory circuits and couplable to the system to provide an interface between the system and the memory circuits, wherein the component is operable to provide to the system an interface to a simulated memory device which differs from at least one physical attribute of at least one of the physical memory circuits, and wherein the component is further operable to perform a power saving operation on at least a portion of the physical memory circuits.