Windows 8 and 8.1 Forums


3.79 gig usable from 4 gig installed memory!

  1. #1


    Posts : 3
    Windows 8

    3.79 gig usable from 4 gig installed memory!


    Hi ;I have an asus laptop and I clean installed windows 8 pro x64...in pc info it says 4.00 gig memory(3.79 usable)...that it wasn't like this before on my last windows 7 sp1 x64...what should I do now?...
    PS: in my bios there is no option named memory remapping or etc.
    Last edited by kasga; 21 Nov 2012 at 12:08.

      My System SpecsSystem Spec

  2. #2


    Are you on 32bit or 64bit?

    32bit is limited on the amount of ram it can use.
    Also you loose some ram to system bios and graphics cards mapped to memory.

    See here for details (applies to all windows after & including vista)
    support.microsoft.com/kb/929605
      My System SpecsSystem Spec

  3. #3


    Posts : 1,308
    Windows 8 enterprise x64


    Aside of the 32 bits limitation, we are talking of what kind of computer ? Do you know the model of motherboard ?
      My System SpecsSystem Spec

  4. #4


    Posts : 3
    Windows 8


    yes...my windows 8 is x64...its asus u36jc laptop...with nvidia 310M 1GB GPU...
      My System SpecsSystem Spec

  5. #5


    Posts : 3
    Windows 8


    Is there any way to enable memory remappin inside windows?...my bios is updated but still there is no option for GPU or Memory..!!!
      My System SpecsSystem Spec

  6. #6


    Some of your RAM is being used by your system for video, BIOS "shadowing", reserved memory, etc...It;s motherboard, chipset and BIOS dependent...
      My System SpecsSystem Spec

  7. #7


    Posts : 20
    Windows 8 Pro x64


    "azasadny" is correct. The system is using that 'missing' memory for the onboard graphics chip and possibly other things like caching the BIOS into memory.
      My System SpecsSystem Spec

  8. #8


    Look at the docs regarding BIOS options, every motherboard has some common options and some have very specific options that will give you better performance or lower power usage (laptops). Only make one change at a time...Good luck!
      My System SpecsSystem Spec

3.79 gig usable from 4 gig installed memory!
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