The SoC tile also contains two ultra low power Crestmont E-cores that Intel has dubbed a 'Low Power Island' that operates with lower voltage and lower frequency.The SoC's low power E-cores are limited in frequency to 2.5 GHz compared to the 3.8 GHz of the E-cores. These cores are designed to handle deep background tasks for laptops in idle or sleep mode All deep background tasks being handled by two Crestmont E-cores in the SoC tile allows the inactive CPU tile to be turned off entirely.