PC2 6400 DDR2 800 Computer RAM
Each generation of computer memory offers a variety of different speeds for different use cases. PC2 6400 DDR2 computer RAM is the fastest widely available variety of second-generation DDR memory. DDR2 memory takes the basic principle of DDR, which is to transmit data on both the rising and trailing edge of the signal and doubles it, transmitting four pieces of data for every tick of the clock.Upgrading DDR2
If your computer has PC2 5300 DDR2 667 computer RAM, you can often get a small but often noticeable boost to performance by upgrading to PC2 6400 RAM. It's important to remember that in order to see this benefit, you have to replace all the RAM, as computers always default to the speed of the slowest installed RAM. Also, if the computer does not support the faster interface, it will also drop back to the fastest interface it supports.Types of RAM
RAM comes in many different types, and different kinds of RAM are not interchangeable. While PC3 8500 DDR3 1066 computer RAM is significantly faster than PC2 6400, it is not physically compatible. The memory sticks are the same size, but the pin-out is different. Different kinds of memory slots also have keys that fit in notches in the RAM stick and these notches are in different places.Laptops and Desktops
Even though they may use the same kind of memory, laptop and desktop RAM sticks are not interchangeable. Desktop RAM comes in 133 millimetre packages, while laptop RAM comes in 67 millimetre SODIMM packages.RAM Installation
When installing Computer memory or RAM, it's always important to make sure you do so properly. If your computer supports dual channel memory, you need to populate each pair of slots with the same amount of RAM. You should also make sure you have at least 8 GB of RAM for most computers.