Quantcast Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

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  1. #1
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    Default Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    I just installed Windows 7 x64 from scratch. It gives the message: 4.00 GB installed (3.00 usable)

    Resource Monitor shows 1026MB of memory being "hardware reserved".

    I updated to the latest bios for HBL50, v3.60 which supposedly adds support for 4G of memory.

    Processor is a T5500, but the chipset is i945PM, so it supports 4GB of ram. Is there a way to remap the ram so that the whole 4GB can be used? BIOs has no options for it, and there is no option to allocate memory from GPU to CPU if that is happening.

  2. #2
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    Its probably a limitation on the motherboard, not all are created equal

  3. #3
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    945PM is the hardware limitation. No way to remap with the Acer.

  4. #4
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    Got the same motherboard, Intel i945PM and i can only use 3,37 GB of RAM.

  5. #5
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    Quote Originally Posted by DEagleson View Post
    Got the same motherboard, Intel i945PM and i can only use 3,37 GB of RAM.
    Quite a difference between 3.37 and 3 Gb RAM.
    My Rig - |Factor Gaming - Sager NP9280|
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    Factor Gaming - Gaming Laptops

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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    The difference may be in the graphics card. Since this model has a dedicated graphics card, the memory for the card has to be allocated by the chipset memory controller as well, I believe, which will eat into the 32 bit memory controller limit.

  7. #7
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    There is more to it than the graphics card, but yes the more devices the less RAM will be available.
    Desktop   15" Macbook Pro Retina
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    Default Re: Acer Aspire 5680 memory: 4.00 GB installed (3.00 usable)

    with my old 5570, a bios update lowered the ram usable from 3.3gb to 3gb. Had issues installing xp/vista (32 and 64bit) with 3.3 usable but none with 3gb

 

 

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