The CPU or Central Processing Unit is the brains of a computer. A CPU is measured by the Clock Speed, Cache Memory and Socket Compatibility. 

CPU's execute instructions from a piece of software and carries out most of the calculations a computer needs to function. The 2 main components of a CPU are the Arithmetic Logic Unit  or ALU and the Control Unit  or CU. A CPU contains links to an ADDRESS BUS, CONTROL BUS and a DATA BUS that connect to the RAM SOCKET.

Arithmetic Logic Unit or ALU is where arithmetic and logical operations are performed.

Control Unit or CU extracts the instructions from memory and decodes and executes them, only using the ALU when it is necessary.

A CPU also has an Instruction Set which contain key tasks such as,

  • LOAD, a number from the RAM into the CPU
  • ADD, two numbers together
  • STORE, a number from CPU back out to RAM
  • COMPARE, one number with a another.
  • JUMP IF, condition to another address in RAM
  • JUMP, to a another address in RAM
  • OUT, to a device such as a monitor.
  • IN, from a device such as a keyboard. 

CPU Heatsink/Cooler

A CPU heat sink/cooler is designed to regulate the temperature of a CPU. There are 2 main ways to control the temperature of a CPU, they are either air or liquid. 

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