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Windows 7 professional 32bit - Installed memory 4GB (3GB usable)

Anonymous
2010-02-05T00:31:09+00:00

i am using a core i7 920 2.6ghz with a P6TD Deluxe asus motherboard. i even go to MSCONFIG  and tick maximum memory,but still it says only 3gb is usable. my vga is

radeon hd 5750 1 gb but system has already shared 1275 mb of memory.

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  1. Anonymous
    2010-02-05T08:17:49+00:00

    Any 32-bit Windows can address a maximum of 4GB, but hardware addresses take part of the address space so you will never be able to use more than about 3.5GB of RAM.

    If you had a 1GB graphics card fitted you might only be able to use around 2.7GB of RAM.

    64-bit Windows with your i7 would be able to use all 4GB of RAM because the hardware addresses with 64-bit would be mapped above 4GB.

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  1. Anonymous
    2010-06-04T16:14:22+00:00

    Well hate to through a wrench in your info.

    But I have same problem despite having Windows 7 64bit OS.

    Also have 64 bit MOBO. (ASUS A8N32-SLI Deluxe)

    Says 4.00GB mem with only 2.75 GB usable...

    Have 2 512MB VGA's.

    So unless I misunderstand what you've said.

    This should not be happening!

    Right???

    O^Op's, I answered my own ?'s.

    ASUS should include this info in the manual!

    2 x  512 MB VGA's = 1.24GB of mem...

    Thus Windows can only round up to .25 of mem not .24...

    But why not the mem in my HP printer?

    Why treat it as a HDD when the VGA mem is used in a similar fashion?

    I just spent $100.00 replacing my 3 GB's of fast mem for low density 4GB!

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  2. Anonymous
    2010-02-05T15:55:56+00:00

    "jakigui" wrote in message

    news:b31c236f-7c71-4cee-834e-51b0b7d0b82c...

    > i am using a core i7 920 2.6ghz with a P6TD Deluxe asus motherboard.

    > i even go to MSCONFIG and tick maximum memory,but still it says

    > only 3gb is usable. my vga is

    > radeon hd 5750 1 gb but system has already shared 1275 mb of memory.

    All 32-bit client versions of Windows (not just Vista/XP/7) have a 4GB

    address space (64-bit versions can use much more). That's the

    theoretical upper limit beyond which you can not go.

    But you can't use the entire 4GB of address space. Even though you

    have a 4GB address space, you can only use *around* 3.1GB of RAM.

    That's because some of that space is used by hardware and is not

    available to the operating system and applications. The amount you can

    use varies, depending on what hardware you have installed, but can

    range from as little as 2GB to as much as 3.5GB. It's usually around

    3.1GB.

    Note that the hardware is using the address *space*, not the actual

    RAM itself. If you have a greater amount of RAM, the rest of the RAM

    goes unused because there is no address space to map it to.

    --

    Ken Blake, Microsoft MVP (Windows Desktop Experience) since 2003

    Ken Blake

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  3. Anonymous
    2010-06-04T17:36:02+00:00

    Go into your BIOS and find and enable the Memory Hole options. Hardware addresses will then be mapped above 4GB and all the memory will be available for use.

    I have had an A8N32-SLi DeLuxe and used all 4GB successfully with several 64-bit Windows versions.

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  4. Anonymous
    2010-06-04T16:25:19+00:00

    Yes, the ASUS A8N32-SLI Deluxe can only support 4 GB, so you're subject to the same address space constraints.

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