In response to changing power output requirements of a UE, an envelope tracking path of a transmission chain changes power modes. The extension comprising an instruction set enabling coordinated interaction between a packet management component and a core processing component of the processor. An entrance opening gives access to the feed unit. By transitioning from the use of the higher power consuming graphics subsystem to the lower power consuming graphics subsystem, while placing the higher power consuming graphics subsystem in a lower power consumption mode, overall power consumption is reduced.