Hardware

Hardware

1. C.P.U

   • Performance
     • Influences
       • Multiples Cores
       • Cache Memory
         • Memory caching
         • Disk caching
   • Control Unit this part controls the input and output devices.
   • Arithmetic Logic Unit this is the part that does all the working out: it does all the maths and makes the decisions.
   • It is also known as microprocessor or processor

2. R.O.M

   • Read only memory
     • Functions
       • To store the start up instructions for a computer
   • Cant be edited
   • Non - volatile
   • Can only be read

3. Memory

4. R.A.M

   • Random access memory
     • R.A.M stores data temporarily
     • R.A.M boots up applications
     • Sizes
       • 256mb
       • 16mb
       • 32mb
       • 64mb
       • 128mb
       • 512mb
       • 1GB
       • 2GB
       • 16GB
       • 32GB
       • 64GB
       • 128GB
   • Volatile

5. Memory

6. Virtual memory

   • V-M
   • Only used when the device is lacking R.A.M
   • Slower
   • Bigger than R.A.M
   • Virtual memory is simulated memory that is written to a page file on the hard drive.
   • Virtual memory is used by operating system to simulate R.A.M sizes by using hard disk drive.
   • Allows us to to run more applications on the system
   • The primary benefits of virtual memory include freeing applications from having to manage a shared memory space
   • 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.

7. Clock speed

   • 1MHz is 1 million instructions per seconds
     • 1GHz is one billion instructions per second