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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,
Kingston Technologies has a lot of very good information.
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DDR Memory Naming Conventions
- DDR memory is usually designated in one of two ways (i.e. DDR
266MHz or PC2100). This can be confusing if you are someone who
does not deal with memory everyday. The table below shows the two
naming conventions.
|
Double Data Rate (DDR) SDRAM |
Double Data Rate (DDR2) SDRAM |
|
DDR 266MHz |
PC2100 |
400MHz DDR2 |
PC2-3200 |
|
DDR 333MHz |
PC2700 |
533MHz DDR2 |
PC2-4200 |
|
DDR 400MHz |
PC3200 |
667MHz DDR2 |
PC2-5300 |
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800MHz DDR2 |
PC2-6400 |
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1066MHz DDR2 |
PC2-8500 |
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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.
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Adding Memory to a Computer
- 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.
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