5. RAM slots This is where data being used by the chip is stored. A good rule is that you can never have enough RAM (random access memory) Ram is rather fussy, and some Ram will not work on some motherboards. Also if you add another 'stick' or Ram, you need to make sure that it will be able to work with the Ram that is already installed. It is also important to make sure that the Ram is correctly inserted, so look at the little slots on the bottom of each stick to make sure it is in the right way around.