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Conventional magnetic storage devices used in consumer electronics, like computer hard drives, MP3 players, and other metallic based products, have separate data storage and execution units. At least part of the delay (or slowness) generated by current products is due to the relatively long way data has to go - being retrieved from the storage, passed to the central processing unit (CPU) for processing and execution, and back again to the storage unit. These back and forth transfers, can dramatically hinder the general performance of the system.

However, the new technology developed by NIST in collaboration with the Korea University and the University of Notre Dame, have proven that thin magnetic layers of semiconductor material could demonstrate antiferromagnetic coupling, where one layer spontaneously lines up its magnetic pole in the opposite direction to the next magnetic layer.

Source: http://thefutureofthings.com/news/6354/a-cpu-that-stores-data.html