Registers, Store small amounts of data, memory and instructions including memory addresses​, Buses, Transports data around the CPU, they connect all the components​, Program Counter, This register counts-up as each instruction is executed, keeping track of how many instructions are in the program​, Cache Level 3, ​This is on the motherboard so quite a slow ​, Accumulator, Stores important data being used in calculation – it's like a notebook in the PC.​, ALU, The CPU component that performs mathematical calculations and logical decisions.​, Control Unit, This manages instructions and controls the other components.​, MAR, This stores memory addresses when searching for data in the RAM​, CIR, Holds the binary representation of the instruction to be executed​, Binary Digits, ​Data and memory are stored as these​, Cores, If there are more of these the processor will run faster​, Cache Level 1, This is close to the CU, ALU and registers​.

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