Windows 7 has 4gb but only shows 2 99gb usable

Hi. I just upgraded my toshiba satellite u305-s2808 to the max of 4gb. However only 2.99gb is usable? What gives? This laptop supports 4gb. I have 32bit windows 7 home premium. Please help
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More about windows shows 99gb usable
  1. Don't we have this written down somewhere? Sigh, OK.

    Your 32-bit Windows has 4GB of available memory addresses. It needs some of these addresses for other things, such as video, motherboard resources, etc.

    In your case, once everything is assigned, your OS has 2.99GB of addresses left over to use with the physical memory.

    This is why people get 64-bit operating systems... because they get more address space. The extra system addresses can be assigned above the 4GB mark, leaving a 4GB chunk free to be assigned to your RAM.
  2. I'm sorry, I am not sure if it has been addressed or not but my apologies for not searching first. I appreciate your help. I have a 64bit desktop system and way more memory is usable. Thanks again.
  3. It get's asked a lot... I guess I'll have to write something more official and clearer.
  4. Quote:
    I'm sorry, I am not sure if it has been addressed or not but my apologies for not searching first. I appreciate your help. I have a 64bit desktop system and way more memory is usable. Thanks again.

    But you have a 32-bit OS and that's where the problem is. What is it that you didn't understand in Proximon's reply?
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