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The Central Processing Unit

The Central Processing Unit. Processor and Main Memory. Learning Intentions. We are learning to : State the function of the processor Describe the differences between RAM and ROM Make comparisons between computer systems using processor speed and main memory size.

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The Central Processing Unit

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  1. The Central Processing Unit Processor and Main Memory

  2. Learning Intentions We are learning to: State the function of the processor Describe the differences between RAM and ROM Make comparisons between computer systems using processor speed and main memory size. State the function of graphics and sound cards.

  3. The Computer System MAIN MEMORY Processor INPUT OUTPUT BACKING STORAGE

  4. Processor and Main Memory Processor Main Memory Processor - Deals with all the movement of data and the calculations that need to be carried out. Main Memory-Used to store programs and data

  5. Makes of processor

  6. A5 processor (IPAD) Intel Core i7 Clock speeds are a measure of how powerful a processor is. 1 Megahertz (1 MHz) = 1 million pulses per second 1 Gigahertz (1 GHz) = 1000 million pulses per second Clock speed 800MHz 3.2 GHz

  7. Clock speed examples

  8. The Main Memory • The main memory can be either RAM or ROM. • Random Access Memory is the working space of the computer. • It holds all the programs and data you are currently using. • When you are using MS Word it has been loaded from your computer’s hard disk into RAM. • The unsaved work you have typed so far is also held in RAM.

  9. Read Only Memory • Read Only Memory is used by the computer to store data permanently. • In computer systems ROM is used to store the Operating System of your computer. • Stores the programs that run MP3 players, Washing machines, Central Heating system and other devices in your home • It is very difficult to change the data held in ROM

  10. RAM vs ROM

  11. Complete the table in your jotter Using www.pcworld.co.uk

  12. Answers

  13. Graphics Card • Specialised piece of hardware used to process the images and videos you see on your screen. • They have their own processor and memory. • The CPU then has the time to get on with processing other data. • The best graphics cards allow your games to run smoothly.

  14. Graphics Card- In Your Jotter Using www.pcworld.co.uk

  15. Answers

  16. Sound Cards • The sound card is used to capture and output audio data. • They improve the quality of sound output from games and multimedia. • Sample Rate: A measure of the quality of the sound that has been captured. Measure in KHz

  17. Sound Card shopping- In your jotter Using www.pcworld.co.uk

  18. Answers

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