Processor input is the entry to the processor, and output is the outgoing data.
The question you should be asking yourself has more to do with quantity than quality, so it’s hard to answer. How much does your computer process? How much does it output? Perhaps “How many inputs can my computer handle?” or “How fast is my CPU?” are better questions that might get you closer to your answer.
Processor input would be what enters into the processor–and CPU chips have lots of inputs for different purposes (the keyboard, mouse, monitor controllers, USB ports…)–all coming in through one input port (the keyboard) or maybe two (keyboard + mouse).