Computer Primary memory!!!

Memmories are basically devided into two.

1. primary memmory

2. secondary memmory

Primary memmories

RAM

ROM

RAM &ROM comparison

RAM

 Short for Random access memmory

 Currently running programs are stored

 Ram is temporary memory.

 The data in RAM can be changed or

deleted

 Processor is always communicate with

RAM.

• accessing speed from RAM is so

fast ,that’s why it is also Known as

computer primary memmory

• Volatile

• All content will be delete when power

failure occur.

• Data writing is fast

• Hold upto several gb of data

ROM

 Short for read only memmory

 Currently running programs are not

stored

 ROM is permanent memory

 The data in RAM can not be changed or

deleted

 Processor do not always communicate with

rom.processor communicate only system

starting time.

 accessing speed from RAM is so slow

compared to RAM

 Non Volatile

 All content do not delete when power

failure occur

 Data writing is slow

 Hold only some mb of data(upto 8 mb)