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    How to use full memory | How to reduce Hardware Reserved memory


    I am not sure its a right place for posting this thread or not (may be it goes to motherboard section)!

    I was upgrading a computer which is Lenovo 3000 Series J200 9690 7KU. It came with 2GB RAM and now I want it to work its maximum capacity of 4GB, so I have used two 2GB ram and it shows that Installed Memory (RAM): 4.00GB (2.87 GB usable)

    so going to "Resource Monitor" I found that "Hardware Reserved" portion got my 1161MB of ram :O

    now how can I reduce it?

    Just to add I have googled the problem and found a suggestion over and over again is to go to msconfig->boot->advanced settings-> maximum memory and uncheck it.

    But in my case its not working at all. I tried checking/unchceking allocating a fixed memory there, but it didnt work.

    Thanks in advance
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    hardware reserved memory is not adjustable thru the OS.
    I assume you are running 32bit OS. In most cases that "usable memory" figure is between 3gb and 3.5gb, so, your 2.87gb IS a bit on the low side.

    If you want to release some of that "reserved memory", the only option I know of is to go into your BIOS and turn OFF any hardware that you don't use and see if it gives you back any memory...but, even with that, the most you will ever be able to use will be absolute maximum of 3.5gb for a 32bit OS.
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    I am using 64bit windows 7 operating system
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    For your specific model the type of RAM you need is as follows (source):

    Memory:
    DDR2 PC2-5300
    Memory Type: DDR2 PC2-5300, DDR2 (non-ECC)
    Maximum Memory: 4GB
    Slots: 2

    Verify you are using compatible RAM (most likely are since the computer boots).

    The latest BIOS version released for that model is version 2TKT53A. Verify your BIOS is up-to-date, and if not, download it here.

    If all else fails, try resetting the BIOS to factory defaults; don't worry this won't "break" anything.
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    Originally Posted by seack79
    For your specific model the type of RAM you need is as follows (source):

    Memory:
    DDR2 PC2-5300
    Memory Type: DDR2 PC2-5300, DDR2 (non-ECC)
    Maximum Memory: 4GB
    Slots: 2

    Verify you are using compatible RAM (most likely are since the computer boots).

    The latest BIOS version released for that model is version 2TKT53A. Verify your BIOS is up-to-date, and if not, download it here.

    If all else fails, try resetting the BIOS to factory defaults; don't worry this won't "break" anything.
    Thanks .. but I have tried this thing also. unfortunetely its not working ether. I dont know exactly what is wrong with it. I know that RAM is ok, BIOS is uptodate, but there is something missing.
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    Here is a great read on what you may be experiencing. It gives some additional things to try; some of which you have already done, and others you have not tried yet (don't know if they're applicable to your situation though).

    http://support.microsoft.com/kb/978610

    As Don said, there are several things that can prevent the OS from having access to all the physical RAM installed.

    "This is expected behavior on computers that are running Windows 7. The reduction in available system memory depends on the configuration of the following:

    1. The devices that are installed in the computer and the memory that is reserved by those devices
    2. The ability of the motherboard to handle memory
    3. The System BIOS version and settings
    4. The version of Windows 7 that is installed (For example, --Windows 7 Starter Edition only supports 2 GB of installed memory.)
    5. Other system settings"
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    Originally Posted by virus_s7
    Thanks .. but I have tried this thing also. unfortunetely its not working ether. I dont know exactly what is wrong with it. I know that RAM is ok, BIOS is uptodate, but there is something missing.
    I have used a notebook with 4 GB RAM and Windows 7 Ultimate 32 bits. It has the same problem. It shows 4 GB RAM installed and only 2.87 GB usable.

    Resource monitor shows 1154 MB hardware reserved RAM.

    I installed Linux Ubuntu 32 bits (dual boot with GRUB) and the same problem. No matters what OS I use, the usable RAM is allways 2.87 GB.

    I replaced later the Linux UBUNTU 32 bits with Linux Mint 64bits and it solved the problem when running Linux, and the problem appears when running Windows. So it must be related to the 32 bits.

    The same hardware, the same BIOS configuration, the problem is present in 32 bits OS.

    I tried with PAE enabled in Windows but didn't change anything.

    If you have more than 3GB, try to use 64 bits OS.

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