CPU speed

The CPU contents a tiny Quartz clock is time this clock ticks one instruction can be dealt with by the CPU show the more time this clock ticks per second the most action the CPU can carry out and the faster things get done.
  The speed of CPU is measured in other megahertz or more commonly now gigahertz A 1 megahertz CPU can carry out 1 million instruction per second. A 1 BF video carry out the billion instruction per second atypical CPU installed in a computer today would Run at around 3 gigahertz which means that can carry out 3 billion instruction per second.
So one way to improve computer performance might be upgraded your CPU to a faster one especially if you have a fairly slow old machine

What is firmware

Small programs call from where are obtained stored in ROM and they contain instruction the computer can use in performing some of the most basic operation required to operate hardware disc

Differences between RAM and ROM

Immediate access storage IAS

Both RAM and ROM are referred to as immediate access storage IAS because CPU can access the data so quickly compared to data in baking a storage the secondary memory

 

the CPU is attached to two kinds of memories Ram which is volatile and ROM which is non volatile

Random Access Memory (RAM)

The internal memory that can be read from as well as written to is called Ram that is Random Access Memory when people talk about computer memory in connection with computer they usually mean the RAM.
  The Random Access Memory Ram is volatile that is its contents are lost when power is turn off because of rams following limitation of auxiliary memory is needed

Read only memory ROM

In this memory information one stored remains fix that is it can be changed so ROM can only be read and used it cannot be changed or written onto. Generally ROM contentsa set of startup instruction that is what to do when a computer is turned on the contents of ROM remaining stored even if Power is turned off

Main ( Primary ) Memory

So now you can know that all computer have main/internal memory to store program and data while computer is running the main memory also has two sub types:-

1.   ROM (READ ONLY MEMORY)
2.   RAM (RANDOM ACCESS MEMORY)