| RAM is considered volatile storage because as | | | | Dynamic random access memory is the most |
| soon as the power supply is stopped, the | | | | common kind of RAM, which stores each bit of |
| contents of RAM are lost. Hence, the data in | | | | a data in a separate capacitor and a |
| RAM stays as long as the computer is running. | | | | transistor. Capacitors tend to leak |
| RAM is much faster to read from and write to, | | | | electrons, thus the need for recharging |
| when compared to other storage devices like | | | | arises. Hence, DRAM, unlike SRAM needs to |
| hard disk, CDROM, Floppy disk etc. RAM can be | | | | have its storage cells refreshed or given an |
| both read and written; therefore, it is | | | | electric charge every few milliseconds. This |
| sometimes also called read-write memory.There | | | | refresh requirement operation is from where |
| are two fundamental types of RAM:(a) Dynamic | | | | dynamic RAM gets its name. DRAM is a volatile |
| RAM (DRAM) | | | | memory because it loses data when the power |
| | | | supply is stopped. |
| (b) Static RAM (SRAM)(a) Dynamic RAM (DRAM): | | | | |