If you are contemplating a DDR memory upgrade, there are a few things to consider. DDR stands for Double Data Rate. The original specification for DDR memory came out between 1996 and 2000. DDR2 premiered in 2003 and DDR3 came out in 2007. The next generation is the DDR4 and its debut is likely in 2012. Most current computers run either DDR2 or DDR3. As motherboard speeds continue to rise, more manufacturers are relying on the faster speeds of the DDR3 memory chips. But, many computers a year or two old are likely running the DDR2 chips right now.
So when should you think about a DDR memory upgrade? If you are replacing your computer completely, make sure any new computer you purchase has DDR3 memory or the capability of adding it later. Some motherboards already offer the option to use DDR2 or DDR3. If you have an existing motherboard, you want to replace, use the same advice. Get a DDR3 capable motherboard instead of sticking with a DDR2 only. If you are upgrading your processor, you should consider a DDR upgrade at the same time. The faster your memory performs the better the processor speed will work.