RAM VS ROM? What are the difference between Ram and Rom!

RAM VS ROM? What are the difference between Ram and Rom!

 *Random Access Memory( or RAM):

It is a volatile type of memory that means it stores data temporarily.Ram comes

into picture whenever we are in-between something means we are doing some task

in our computer. As it is a volatile memory data is stored temporarily on electrical

transistors ,as long as our system is turned on we have the data on Ram and after

shutting down our system we miss the data. Programs run on RAM and as soon as

we stop running the program it goes out of the RAM .

 

 

  Types of RAM:

     *SRAM

              Static random access memory stores data using six transistor memory cell. SRAM is frequently used as cache memory for the CPU and it is not typically user friendly .  

          *DRAM

   Dynamic random access memory stores data using a transistor and a capacitor pair. DRAM is slightly slower compared to SRAM and cheaper too.

  

Advantages of RAM:

1.     High speed

2.     Temporary memory (volatile)

3.     Faster than secondary storage

4.     Fastest type of memory in a computer.

5.     Consumes less power compared to disk drives hence increasing battery life.

 

 
* Read Only Memory(or ROM) :

it is a non-volatile memory. Data can be store permanently and it comes inbuild

with our system .We can store our data ,program files into ROM when they are not in running state .

 

Types of ROM:

* ROM

This is your normal ROM that is found in most PC's. It is designed similar to a processor, and is made out of silicon. Data can be read from it but you cannot write data on it. This is the permanent memory of the system. It is used to perform a single function.

* PROM
PROM is programmable ROM. Sometimes we may want to write some data on the ROM. In such cases we use PROM. Data can be written on it using special equipment. It is important to note that data can be written on PROM only once but it cannot be removed from the PROM.

* EPROM
EPROM is programmable ROM from which data can be programmed and erased. Note that programming and erasing is not limited to just one time. It is done using ultra violet light. The downside to this that i requires additional hardware to program it. EPROM is now used in most bios systems. This provides flexibility for the programmer.

* EEPROM
 EEPROM is the next generation of ROM. It takes EPROM to the next level. As compared to EPROM, EEPROM can be programmed using software technology. The user himself can program the ROM using system software. The main advantage of this is you don't need special hardware to program it. This saves the programmer a lot of money. This has become the dominating force in the BIOS ROM market. Majority of the motherboards these days come with EEPROM.

Advantages of ROM:

1.     ROM is non-volatile.

2.     ROM is cheaper than RAM.

3.     ROM stores data permanently.

4.     The circuits of ROM are simple.

5.     ROM is more reliable than RAM.

6.     ROM is secure data storage.

7.     They are static and do not need refreshing.

 

 

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