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How to enable 4GB in my Windows 7 64 bit?

My Windows 7 is 64-bit, and I thought that means it can use the full 4GB of RAM installed on the computer.

But I just saw this on my computer's properties: (So only 3.25GB is usable??)

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closed as exact duplicate by fretje, Diago♦ Nov 8 at 18:09
This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question.

3 Answers

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This is usually down to either memory being shared against a graphics card or a motherboard limitation that prevents 4GB of memory being accessible.

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Graphics card seems to be more often the case as far as I have seen – AdamV Nov 8 at 8:30
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Maybe you're experiencing the same issues as: http://superuser.com/questions/35731/how-to-enable-4gb-in-my-windows-7-64-bit

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Have you checked how much ram your video is sharing? Although with an experience score of 5.9 it's not too likely you are using on-board. Something to clarify in the details anyway.

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