Cant Enable PAE mode

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  1. Posts : 65
    Windows 7 Ultimate x64
       #1

    Cant Enable PAE mode


    i've tried what Microsoft suggests. i've Tried EasyBCD but still it snot enabled, and i still show 3.5GB of 4GB usable. (where thers 512MB Hardware reserved) Any idea how to force this to work?
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  2. Posts : 664
    Windows 7 Home Premium 64bit
       #2

    I'm afraid 32 bit windows 7 has a 3.5GB RAM limit no matter what. The limits then vary working your way up the 64 bit version ladder. (the unofficial PAE stuff for Windows 7 is unstable)

    Actually, scratch that. Apparently the limit is 4GB for all 32 bit versions but starter :/
    Last edited by biggles1000; 18 Apr 2011 at 15:55. Reason: Mistake
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  3. Posts : 664
    Windows 7 Home Premium 64bit
       #3

    Apologies for my confusion :/
    You may find this handy, as it sound like the same issue: The usable memory may be less than the installed memory on Windows 7-based computers
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  4. Posts : 65
    Windows 7 Ultimate x64
    Thread Starter
       #4

    i gues im stick as i dont have a memory mapping function in my BIOS. and theres no new updates :/
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  5. Posts : 664
    Windows 7 Home Premium 64bit
       #5

    Guess so, sorry :/
    Upgrading to 64 bit may fix it, but that costs money and you'd need to do a completely fresh install :/
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  6. Posts : 6,879
    Win 7 Ultimate x64
       #6

    All 4 GB should be available if you install 64 bit as according to the specs for your motherboard (assuming the one in your specs),

    ECS Web Site

    it supports up to 16 GB total (2x8 GB). Also as far as the memory remapping, if I'm reading the manual for it this is the setting (worded differently than what would be expected),

    Cant Enable PAE mode-memoconfig.png

    and is enabled by default.
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  7. Posts : 173
    Windows
       #7

    PAE is enabled by default (DEP), but Microsoft has crippled it, so it cannot help you.
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  8. Posts : 5,642
    Windows 10 Pro (x64)
       #8

    pallesenw said:
    PAE is enabled by default (DEP), but Microsoft has crippled it, so it cannot help you.
    It would not help in this situation either way. The hardware will still take the 512 MB of address space. Windows does not control how the address space is allocated, that is left to the hardware. Its out of its hands.
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  9. Posts : 173
    Windows
       #9

    I haven't checked the specs, but according to stormy13 the hardware supports > 4GB plus memory remapping, so a non-crippled PAE kernel can use all of it.
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  10. Posts : 65
    Windows 7 Ultimate x64
    Thread Starter
       #10

    i got it enabled so now i just need an patched PAE Kernel then.:/ and i know its at the windows 7 side. i've tested and Ran 4gb full under XP before with this board ( awhile back my bro lost ram once before sp i yanked the 2nd 2GB stick back then and put it in his PC) but this was before Windows 7 (well i got my copy in october 09 at the Detroit's "The New Efficency" seminar)
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