Adding Computer memory is one of the most useful upgrades that you can perform and also one of the cheapest. especially if you just want to increase the capabilities of Microsoft Windows. In some cases, doubling your Computer memory can virtually double the speed of your Computer.

Memory chips comes in different types and sizes.

The old one’s were the EDO Ram used in 486 and Pentium 1 Computers The next is SDRAM, RDRAM, DDR and the latest is DDR2
DDR2 - Double data rate 2 - Is a new version of DDR which is twice as fast as original DDR.
DDR2 is the latest in high speed memory.

How to Install Computer Memory