Complex sentence: The 4th generation OMAPs, OMAP4430,4440 and 4470 all use dual-core ARM Cortex-A9s as well as two ARM Cortex-M3s running at 266 MHz to offload the A9s in less computionally intensive tasks to increase power efficiency.
Split into simpler sentences: The 4th generation OMAPs, OMAP4430,4440 and 4470 all use dual-core ARM Cortex-A9s. The 4470 additionally contains two ARM Cortex-M3s running at 266 MHz to offload the A9s in less computionally intensive tasks to increase power efficiency.