Guide to Computer Memories

Computer memory, also called Random Access Memory (RAM), temporarily stores programs, applications, and files to be accessed by the processor. It determines the computer’s speed and capacity, particularly in multitasking applications. A computer with larger RAM can handle several applications simultaneously without slowing down. It is usually measured in megabytes or gigabytes, with sizes ranging from 128MB to 2GB. It comes in the form of modules or chips installed in a slot in the computer's motherboard. 

Single In-Line Memory Module (SIMM)

The Single In-Line Memory Module (SIMM) provides limited memory and cannot hold large amounts of data. It is one of the oldest types of memory and is seldom used today.

Dual In-Line Memory Module (DIMM) or SDRAM

The Dual In-Line Memory Module (DIMM), also called SDRAM, has more capacity than the SIMM but is still relatively limited. It is fairly cheap and supported by many types of motherboards.

Double Data Rate (DDR) DIMM or SDRAM

The DDR DIMM or DDR SDRAM is an upgraded version of the DIMM.
It is faster and has a greater memory , but usually requires a motherboard with a special socket for installation. It is more compatible with AMD processors, but it works with Intel processors as well. It is the most commonly used computer memory today.

Rambus (RIMM) RAM

The Rambus (RIMM) or RDRAM provides the fastest speed and the greatest memory capacity. It is designed exclusively for Pentium 4 computer processors. It is also available in smaller versions for use with laptops.

Size: Choose a computer memory with the a high memory capacity for maximum performance. Get a 256 or 512 MB RAM for running multiple programs.

Compatibility: Choose a computer memory compatible with your computer and the type of applications you use. If you intend to use your computer for playing games with 3D graphics and multimedia applications, get a RAM with at least 512 MB of memory.