I installed 2GB X 4 in my PC why is it that only 3 5 is USABLE?

hello, why is ti that only 3.5 is usable in my RAM while I installed 8GB (2GB x 4)? :(
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More about installed usable
  1. It sounds like you are using the 32-bit version, and not the 64-bit version. The 32-bit versions can only see and use ~3.5 GB of total memory, while the 64-bit version has much, much higher memory limits.
  2. @Treefrog07
    Correct, 64-bit (Ultimate for me) runs up to 256gigs of RAM where as 32-bit can't cap 4gigs of RAM so I hear.

    Over all you needa upgrade your OS.
  3. Assuming that you really are running the 64-bit version of Windows, the problem may be due to your boot configuration. Try this:

    - Start -> type "msconfig" in the search box and hit <enter>

    - Click the "boot" tab

    - Click the "Advanced Options..." button

    - Make sure that the "maximum memory" option is not checked.
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