Can I have have 2 Different Size Ram Chips on my Mobo ?

elyono58

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Apr 17, 2013
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Hello I was wondering if its possible to add a 2nd ram chip to my PC and was wondering if it has to be the same size as the current one in the other slot.
Currently my Mobo has 2 ram slots and im only using one.
My question is can I add a 2gb ram chip ? or does it have to be another 4gb ram chip ?