Memory module

Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom).

A memory module, commonly called RAM, memory, or a RAM chip, is a dynamic random access memory integrated circuit module mounted on a printed circuit board and designed for use in personal computers, workstations, and servers.

It Is used to refer to these specific types of memory modules:

• Dual in-line package memory
• TransFlash Memory Module
• SIPP memory, single in-line pin package memory
• SIMM, a single in-line memory module
• DIMM, dual in-line memory module
  • Rambus memory modules are a subset of DIMMs, but are usually referred to as RIMMs
  • SO-DIMM, small outline DIMM, a smaller version of the DIMM, used in laptops

Distinguishing characteristics of computer memory modules include voltage, capacity, speed (i.e., bit rate), and form factor.