Dynamic Random-Access Memory chips are mainly used in stationary desktop and workstation type computers, as opposed to portable computers. Dynamic Random-Access Memory is used to store temporary electronic information used by and for computer software. Parameter Random-Access Memory is used to store internal, system wide computer information that is independent of external storage devices connected to computer. They work similarly to Dynamic Random-Access Memory, only they are specifically made for portability. Video Random-Access Memory is used for video display support for colors.
RAM allows the processor to manipulate temporarily stored values inside it.
The ability to manipulate new values enable the processor to dynamically interact with the outside environment. Random-Access Memory, RAM, is needed because it accesses stored digital information at a rate much faster than any other storage media. The average time it takes the computer processor to access a bit of information from a hard disk is between eight milliseconds to 16 milliseconds. The average time it takes the same processor to access a bit of information from RAM is between 50 nanoseconds to 80 nanoseconds. A millisecond is a thousandth of a second.