Create
Learn
Share

Computer Memory Module Pin Counts

rename
xorasaje's version from 2017-10-01 12:24

DIMM

The Dual Inline Memory Module (DIMM) is the current standard circuit board used for desktop and server RAM.

 

Question Answer
SDR168 pins
DDR184 pins
DDR2/DDR3240 pins
DDR4288 pins
memorize

SODIMM

The Small Outline Dual Inline Memory Module (SODIMM) is a smaller version of a DIMM that is mainly used in laptops.

 

Question Answer
SDR144 pins
DDR/DDR2200 pins
DDR3204 pins
DDR4256 pins
memorize

MicroDIMM

The MicroDIMM is the smallest version of a DIMM and it is used where space is extremely limited, such as in subnotebooks or small form factor computers. There is currently no DDR4 version available.

 

Question Answer
DDR172 pins
DDR2/DDR3214 pins
memorize

Other

The Rambus Inline Memory Module (RIMM), also referred to as Direct Rambus Dynamic Random Access Memory (DRDRAM or RDRAM), was intended to replace SDRAM DIMMs. It later lost out against DDR SDRAM due to having high latency and heat output.
The Single Inline Memory Module (SIMM) was the first RAM circuit board. There were two non-proprietary versions with different pin counts. It was created to make the installation of RAM easier by having all of the chips on a small removable circuit board instead of on the motherboard.

 

Question Answer
RIMM184 pins
SIMM30 or 72 pins
memorize

Abbreviations

AbbreviationMeaning
RAMRandom Access Memory
DRAMDynamic Random Access Memory
SRAMStatic Random Access Memory
SDRAMSynchronous Dynamic Random Access Memory
DIMMDual Inline Memory Module
SODIMMSmall Outline Dual Inline Memory Module
MicroDIMMMicro Dual Inline Memory Module
RIMMRambus Inline Memory Module
SIMMSingle Inline Memory Module
DDRDouble Data Rate
SDRSingle Data Rate
memorize