Why am I unable to change the processors per frame option?
Due to the processing requirements of Maxwell Render, the processors per frame option is automatically set to 8.  Render Rocket has determined that this is the most efficient setting for Maxwell Render. Please be aware that the processor hours will be 8 times the actual processing time.  If your Maxwell Render job takes 3 hours of actual render time, the render job ran for 24 processor hours.  Render Rocket charges are based on processor hours, one processor running for one hour.