x64 Win7 is reporting only 3GB out of 4GB RAM

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  1. asuh
    Posts : 26
    Windows 7 RTM
    Thread Starter
       New #11

    Frostmourne said:
    Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
    The title of the post stated it was x64.

    I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.
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  3. DreemWarrior
    Posts : 589
    Windows 7 ultimate X64
       New #12

    asuh said:
    I'm a bit confused why it's saying this. All the RAM is PC6400 and it's compatible with my machine.

    I see this when I go to System properties (right-click Computer and properties). Beside the Installed Memory (RAM) label, it says 4.00 GB (3.00 GB usable).

    Very strange. Hopefully it's just a tiny mistake?
    Just to calrify: you are running x64 right?
    What edition?



    The maximum RAM limitation for Windows 7 32-bit editions is 4GB.

    Windows 7 64-bit editions vary in the amount of memory that can be addressed, depending on the edition of the operating system.

    The maximum RAM limits for the different editions of Windows 7:
    Starter8GBHome Basic8GBHome Premium16GBProfessional192GBEnterprise192GBUltimate192GB

    Starter-8Gb
    Home Basic-8Gb
    Premium -16Gb
    Pro-192Gb
    Enterprise-192Gb
    Ultimate-192Gb

    Starter8GBHome Basic8GBHome Premium16GBProfessional192GBEnterprise


    192GB
    Ultimate192GB
    Have you had any crashes lately?
    You may try doing a system repair with your Win7 disk. I'll get back to you as soon as I can.
      My Computer
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  4. Frostmourne
    Posts : 2,685
    Windows 7 Ultimate x86-64
       New #13

    asuh said:
    Frostmourne said:
    Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
    The title of the post stated it was x64.

    I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.
    What other expansion cards? RAM in dual channel? Seated properly? Nothing on the gold edges of the DIMMs?
      My Computer
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  6. DreemWarrior
    Posts : 589
    Windows 7 ultimate X64
       New #14

    SHEESH Yall are quick on the draw.....
      My Computer
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  7. asuh
    Posts : 26
    Windows 7 RTM
    Thread Starter
       New #15

    DreemWarrior said:
    Just to calrify: you are running x64 right?
    What edition?
    Ultimate.

    DreemWarrior said:
    Have you had any crashes lately?
    You may try doing a system repair with your Win7 disk. I'll get back to you as soon as I can.
    No crashes. No need to do system repair.
      My Computer
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  8. asuh
    Posts : 26
    Windows 7 RTM
    Thread Starter
       New #16

    Frostmourne said:
    asuh said:
    Frostmourne said:
    Its not the motherboard, its the hardware. Do you have an integrated GPU, any add-on cards? And is 7 x86-64 or x86? If its the second one, 7 can only access 3GB or so. If its 64-bit, it will depend on the hardware installed.
    The title of the post stated it was x64.

    I have a dedicated GPU, XFX 8800GS, that shouldn't require extra RAM AFAIK.
    What other expansion cards? RAM in dual channel? Seated properly? Nothing on the gold edges of the DIMMs?
    No other expansion cards. 2GB(1GBx2) of RAM in dual channel, and 2GB (2GBx1) alone. All seated properly.
      My Computer
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  10. Frostmourne
    Posts : 2,685
    Windows 7 Ultimate x86-64
       New #17

    Its the RAM, I'd replace it with a single 4GB kit (2x2GB) - are they from the same manufacturer? Same timings? Same frequency?
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  11. whs
    Posts : 26,210
    Vista, Windows7, Mint Mate, Zorin, Windows 8
       New #18

    Frostmourne said:
    Its the RAM, I'd replace it with a single 4GB kit (2x2GB) - are they from the same manufacturer? Same timings? Same frequency?
    Why would you do that. The 4GBs are properly reported - only not all useable. So there must be someone that's using the 1GB since Resource Monitor reports 1GB as Hardware reserved.
      My Computer
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  12. DreemWarrior
    Posts : 589
    Windows 7 ultimate X64
       New #19

    Here is the issue...


    "If you are running 64-bit Windows, you may have to live with it. Depending on your motherboard's chipset, your system may support memory remapping. If so, you will be able to use all 4GB of RAM. Detailed:
    Due to an architectural decision made long ago, if you have 4GB of physical RAM installed, Windows is only able to report a portion of the physical 4GB of RAM (ranges from ~2.75GB to 3.5GB depending on the devices installed, motherboard's chipset & BIOS). "
    Read more....
    TabBlogger : The 3GB-not-4GB RAM problem

    Hope this helps explain the memory issue for you.:)
      My Computer
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  13. asuh
    Posts : 26
    Windows 7 RTM
    Thread Starter
       New #20

    DreemWarrior said:
    Here is the issue...


    "If you are running 64-bit Windows, you may have to live with it. Depending on your motherboard's chipset, your system may support memory remapping. If so, you will be able to use all 4GB of RAM. Detailed:
    Due to an architectural decision made long ago, if you have 4GB of physical RAM installed, Windows is only able to report a portion of the physical 4GB of RAM (ranges from ~2.75GB to 3.5GB depending on the devices installed, motherboard's chipset & BIOS). "
    Read more....
    TabBlogger : The 3GB-not-4GB RAM problem

    Hope this helps explain the memory issue for you.:)
    Memory mapping, eh? I'll check my BIOS and see what's going on there. Thanks for the info.
      My Computer
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