Memory and System Architecture

Memory and System Architecture

1. CPU

   • Process
     • Fetch
     • Decode
     • Execute
   • Cache
     • Large = Slow
       • Level 3
     • Small = Fast
       • Level 1
     • Stores data
   • Control Unit
     • controls flow of data
   • ALU
     • Does Maths calculations
   • Clock speed
     • Increase
       • Add more cores
       • increase cache size
     • FDE cycles per second
     • measured in (kilo, mega, giga) hertz,
   • Register
     • Fast memeory
     • Stores data being that is currently used

2. Memory

   • RAM
     • volatile
     • Random Access Memory
     • Stores data for current applications
   • ROM
     • non-volatile
     • Read Only Memory
     • Stores bootup instructions
   • Virtual Memory
     • Memory on disk
     • Primary storage
     • Twice as much as RAM