DDR (Double Data Rate) and DDR2 (Double Data Rate 2) are types of random access memory (RAM) used in computers. DDR2 is a newer technology than DDR, and it offers several advantages, including faster speeds and lower power consumption. As a result, DDR2 has largely replaced DDR in new computers.
There are a few different ways to check whether your computer has DDR or DDR2 RAM. One way is to look at the RAM modules themselves. DDR2 modules have a notch in the center of the module, while DDR modules do not. Another way to check is to use a software program. Several different programs can be used to identify the type of RAM installed in your computer.