The first single core processor was the, which was commercially released on November 15, 1971 by. Since then many improvements have been made to single core processors, going from the 740 kHz of the Intel 4004 to the 2 GHz Celeron G470. • Single core processors draw less power than larger, multi-core processors.• Single core processors can be made a lot more cheaply than multi core systems, meaning they can be used in embedded systems.