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Thread: WHere is all my ram???

  1. #1
    Join Date
    May 2010
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    WHere is all my ram???

    Ok, I know for a fact that I have 4 gigs of physical ram, but Ubuntu tells me I only have 2.8. Why is this??? Any help would be appreciated.

  2. #2
    Join Date
    Oct 2006
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    58,286

    Re: WHere is all my ram???

    Are you running 32 or 64 bit Ubuntu ?

    32 bit will see much less than 4 gig, and if you have integrated graphics taking shared memory, you will be left with even less.

  3. #3
    Join Date
    May 2010
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    7

    Re: WHere is all my ram???

    Yea, it's 32 bit (unfortunately). As long as I'm still using all of it, I'm ok, I guess, I just want to make sure that 1.2 isn't just going to waste.

  4. #4
    Join Date
    Dec 2005
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    What a weird trip.....
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    4,676
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    Ubuntu 12.04 Precise Pangolin

    Cool Re: WHere is all my ram???

    So the OS can "see" all four gigs of ram you need to use the 64 bit version of Ubuntu
    If at first you don't succeed - just buy the company and tell them to make the one you want.

  5. #5
    Join Date
    Feb 2010
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    Ubuntu Development Release

    Re: WHere is all my ram???

    Doesn't ubuntu has PAE?

  6. #6
    Join Date
    May 2006
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    562
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    Ubuntu Development Release

    Re: WHere is all my ram???

    The desktop version does not have PAE. You can install the kernel from the server and get that working.

  7. #7
    Join Date
    Dec 2005
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    Ubuntu 12.04 Precise Pangolin

    Re: WHere is all my ram???

    Quote Originally Posted by bustedbit View Post
    Yea, it's 32 bit (unfortunately). As long as I'm still using all of it, I'm ok, I guess, I just want to make sure that 1.2 isn't just going to waste.
    Well yeah, it is going to waste. A 32-bit system can only see 4 GiB of RAM in total, INCLUDING any memory that is sitting inside peripherals in your computer or chipsets on your motherboard.

    So, if you have a 512MiB graphics card, that 512 MiB is taken out of the 4 GiB of addressable memory. That portion of your RAM is sitting idle, unaddressable.

    If you use a PAE kernel or a 64-bit system, then you have much more address space, and the parts of your computer that have their own memory can be addressed without overlapping your RAM.
    I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.

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