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Tutorial - Memory Guide

Here is a list of the most common types of computer memory chips you can buy. As you can see there are many different types. The best place I've found to get computer memory online is here. All different types can be bought at some of the best prices on the internet.

When purchasing RAM it is important to get the right type for your motherboard. There are also different prices and performances for each type, use our guide to get a better understanding of different types memory. When you are ready to shop for memory click here to browse our memory selection. Feel free to bookmark this page.

SD Memory:

SD Ram is older, slower and the most common memory type. If you have a Pentium II then you will use this type. PC100 is old and is generally not used in newer PIII or P4 class computers.

PC133 is the newer and slightly faster. This memory is commonly used in Pentium III or Celeron computers. CAS2 or CAS3 spec refers to the memory latency. CAS2 is a bit faster so get this for better performance. The third spec is the amount in megabytes or size per stick/simm

New computers should have at least 128mb of total memory. You can get ECC versions of this memory that check for errors. This adds to the cost but is more reliable but is really on used for servers.

• PC100 CAS2 64mb
• PC100 CAS2 128mb
• PC100 CAS2 256mb
• PC100 CAS3 64mb
• PC100 CAS3 128mb
• PC100 CAS3 256mb

• PC133 CAS3 64mb
• PC133 CAS3 128mb
• PC133 CAS3 256mb
• PC133 CAS3 512mb
• PC133 CAS2 64mb
• PC133 CAS2 128mb
• PC133 CAS2 256mb
• PC133 CAS2 512mb

• PC150 128mb
• PC150 256mb
• PC150 512mb

Rambus Memory:

This is a special type of memory that is only used by Pentium 4 computers. You must install two chips at once.

Rambus memory is very fast and is the fastest memory you can get for the Pentium 4. There is ECC Rambus as well if you want to build a reliable server.

DDR Memory:

DDR stands for Double Data Rate. DDR memory is the most common form used with AMD Athlon processors as well as Intel's P4 processor. DDR memory is much faster than SD memory. Listed below are a few common sizes of DDR Ram.

• PC2100 128mb
• PC2100 256mb
• PC2100 512mb

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