Hardware

Hardware

C.P.U
1. Performance
  1. Influences
    1. Multiples Cores
    2. Cache Memory
      1. Memory caching
      2. Disk caching
2. Control Unit this part controls the input and output devices.
3. Arithmetic Logic Unit this is the part that does all the working out: it does all the maths and makes the decisions.
4. It is also known as microprocessor or processor
R.O.M
1. Read only memory
  1. Functions
    1. To store the start up instructions for a computer
2. Cant be edited
3. Non - volatile
4. Can only be read
Memory
R.A.M
1. Random access memory
  1. R.A.M stores data temporarily
  2. R.A.M boots up applications
  3. Sizes
    1. 256mb
    2. 16mb
    3. 32mb
    4. 64mb
    5. 128mb
    6. 512mb
    7. 1GB
    8. 2GB
    9. 16GB
    10. 32GB
    11. 64GB
    12. 128GB
2. Volatile
Memory
Virtual memory
1. V-M
2. Only used when the device is lacking R.A.M
3. Slower
4. Bigger than R.A.M
5. Virtual memory is simulated memory that is written to a page file on the hard drive.
6. Virtual memory is used by operating system to simulate R.A.M sizes by using hard disk drive.
7. Allows us to to run more applications on the system
8. The primary benefits of virtual memory include freeing applications from having to manage a shared memory space
9. Virtual memory is a memory management capability of an operating system that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from R.A.M to hard disk drive storage.
Clock speed
1. 1MHz is 1 million instructions per seconds
  1. 1GHz is one billion instructions per second

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	Created by James Tang about 6 years ago