COMPUTER SCIENCE 005 OVERVIEW (41117) Fetch: Control unit goes to address name, copies it, puts it into the instruction register, and implements the program counter. Decode: Instruction present in the instruction register is interpreted by the decoder. Execute: Control unit sends decoded information as signals to control processing unit, then to the ALU to perform mathlogic, then back to the instruction register. RAM: volatile. Losses information when its turned off. Faster clock Needs more power overheats. Increase speed expensive. Not necessarily the best choice. Larger cache: slower slows down processor. GPU: Graphics Processing Unit Receives commands that manipulate images on the screen quickly.