I have 1gb RAM and when i wanted to repace one of the 2x512 gb iwth 1gb the windows says that I have 1gb but I should have 1.5

AwesomeToken

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Dec 23, 2013
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I have 1gb RAM and when i wanted to replace one of the 2x512 gb with 1gb the windows says that I have 1gb but I should have 1.5gb. I am using DDR400!