RAM

RAM:
Random Access Memory (RAM) is the "working memory" in a computer.RAM consists of one or more memory modules that temporarily store data while a computer is running.  RAM is the most common type of memory used in computers. A computer's RAM is the memory used to store data and programs on a temporary basis. The RAM is compared to short-term memory, as it stores applications and information that is actively used while the system is on. The amount of RAM directly affects a computer’s performance. The more RAM a computer has the more programs and documents it can have opened without slowing the system down. Current PC computers have from 256 MB of RAM to as much as 4 GB of RAM. Mac computers generally have between 128 and 512 MB of RAM.

·       RAM is volatile memory, meaning it is erased when the power is turned off.

·        RAM can be accessed much faster than other storage devices. In fact, the data can be transferred between CPU and RAM more than a hundred times faster than between the CPU and the hard drive.

·       RAM holds data and processing instructions temporarily until the CPU needs it.

·       RAM has less capacity to store data i.e. from 256MB to 4GB RAM.

Types of RAM:

There are two types of RAM:

·       DRAM

·       SRAM

DRAM:

·       DRAM stands for Dynamic Random Access Memory.

·       DRAM needs to be refreshed periodically.

·       DRAM loses its stored information in a very short time 

·       DRAM is slower memory.

·       DRAM is less expensive.

SRAM:

·       SRAM stands for Static Random Access Memory.

·       SRAM not needs to be refreshed periodically.

·       SRAM stored information for long time 

·       SRAM is faster memory.

·       SRAM is expensive.