Memory and system performance

• RAM:

  High speed

  volatile memory

  This is where data and files are stored when they are being used
• ROM:

  Non-volatile memory

  Tells the CPU how to boot up
• Virtual memory:

  When the RAM is full it moves data not recently used into the virtual memory

  It is probably needed when there too many application opened
• The CPU performance depends on 3 things:

  Clock speed

  Number of Cores

  Cache size
• Clock speed:

  Is the number of instructions that a single processing core can carry out per second

  High clock speed greater number of instructions that can be carried out
• Number of Cores

  More cores more instruction that can be process a batch of data
• Cache size:

  Bigger cache size allows the CPU faster access to more data that it needs to process