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I agree with Rtrahan that most laptops have two RAM slots (though I have seen some that have three or even four slots but those are usually gaming laptops rather than run-of-the-mill machines). However, he is incorrect that both slots have to be used. Instead, many laptops actually come with a single RAM stick and leave the additional slot open for the user to add more RAM if/when he decides to do so. The only concern is to make sure that the speed of the RAM that is added later is the same as what is already in there. If the added RAM is faster, then it will be slowed down by the original stick of RAM and you have just wasted your money on speed that you can't use. If you, instead, get slower RAM that what is already installed, then you will be bottlenecking your machine because now the original RAM will have to slow down for the new RAM, thus degrading performance.

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10y ago

What else can I help you with?