There are many different types of memory and this page is by no means a complete
dissertation on the various types of memory you will find in computers or printers.
For more detailed information,
has a lot of very good information. I use their site to lookup which memory
is needed for a specific device.
Adding Memory to a Computer
The first thing is to lookup what memory has been tested for the computer
on the manufacturer’s website. If that cannot be found Kingston has a memory
lookup tool that covers most computer’s memory configuration.
When adding memory to a computer all of the memory needs to be the same speed
(i.e. PC133, PC3200, etc...) and have the same CL number (Column Access Strobe
Latency i.e. CL2, CL3, etc...) or the computer will be unstable.
DDR Memory Naming Conventions
|Double Data Rate (DDR) SDRAM
||Double Data Rate (DDR2) SDRAM
|Double Data Rate
Identifying Older Memory
The first step in determining what type of memory your system uses is by
looking for a manufacturer's part number. The better memory manufacturers
will normally attach a label to the memory stick. If there is no label and you
have no clue what type of memory you have you can start by measuring the length
of the memory.