So what is the best memory that you should get to your computers to make sure that it runs smoothly, especially with graphics and all that jazz? Double Data Rate memory, or more commonly known as DDR, has double the bandwidth compared to its older version the SD-RAM. Nowadays, the new computers that are manufactured and sold to the general public are starting to come out with a faster version called DDR2 memory. But put this in mind that if you are thinking about upgrading your systems, I suggest you don’t do it because it is never possible to use DDR and DDR2 at the same time. The DDR offers data rates of 200/266/333/400 Mbps while DDR2 offers 400/533/667 and DDR2 has two times the latency in addition to a reduced voltage requirement. Higher speeds of DDR2 memory allow it to have up to 10.6GB per seconds of throughput compared to DDR1 memory which maxed at 6.4GB per second. 2GB DDR2 memory of course, have been made available to get more speed to your computer and if you are lucky enough to be able to afford one, I suggest you do because nothing beats using a high speed internet in a high speed computer.