The CPU is the brain of any PC. The CPU works by taking deta out of memory , processing it and placing it back into memory it is through memory that the other devices that make up the PC interact with the CPU it may be helpful if you think of the CPU as an agents pending its time going from the one device to another , multitasking its help is needed.if the processing job the CPU is asking to do is lengthy , it may not be available to the other devices connected to the PC until that job is completed . this process explains why sometime you can type a command and it seems to take a while for the computer to respond. the CPU was processing another instruction , and took a moment for it to get to the keyboard's memory location , retrieve your key stroke, determine what keystroke meant , and execute that instructionThe processor's performance is measured in terms of the amount of data it can process at one time and the speed at which it can process that data . than data is measured in bits processing speed in megahertz ( MHz ).
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