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  1.    30 Jul 2015 #1
    Join Date : Jul 2015
    Drexel Hill, Pennsylvania
    Posts : 31
    Windows 8.1 pro, Windows 10 Pro

    Windows 10 Pro only reading 24 GB of 32 GB installed,


    Ok so here's what I have done so far. 1) created a bootable USB with Windows 10(64 bit) upgrade 2) installed the upgrade successfully with no issues 3) when I check system info it shows only 24 GB of ram and 16 GB of this is "usable". However when I check the RAM limits on Windows 10 Pro it says 128 GB is the limit. 4) reverted back to 8.1 Pro and the ram shows all 32 GB as installed and usable , so this rules out a bad DIMM. I also checked through Speccy and it shows all 32 GB as installed and operating ( even when I was still running Windows 10 Pro).

    So at this point I am totally confused as to what is happening with Windows 10 Pro not addressing all available RAM even though its clearly below the OS's limitations. It seems that there is either a physical addressing problem or the information they have provided as far as RAM limitations is extremely inaccurate.

    I am wondering if I am the only person experiencing this issue or have others ran into it , and if so is there a workaround I have not thought of at this point( I have removed and re-seated all the RAM , they are a set of 4 8 GB sticks that came together so they are "paired".
    Attached Thumbnails Attached Thumbnails performance tab via task manager Windows 10 Ram fiasco.PNG   speccy infor during ram fiaso win 10.PNG   system info during ram fiasco win 10.PNG  
      My ComputerSystem Spec
  2.    30 Jul 2015 #2
    Join Date : Sep 2014
    Nashville, TN
    Posts : 3,143
    Windows 10 Pro

    Is this a new build? Have you ever run Windows 8.x on it? Did it see all memory? Have you tried re-seating the memory?

    I can assure you, the memory limits are accurate, and 32GB is fine with Windows 10 Pro.

    What chipset do you have? Have you installed all the necessary drivers?
      My ComputerSystem Spec
  3.    30 Jul 2015 #3
    Join Date : May 2015
    Posts : 1,647
    Win 10 X64 Pro 15063

    The "single channel" line is a bit worrying, too. It's as if the machine was only seeing 3 of the 4 DIMMs.

    Do they all show up in the BIOS (or UEFI) settings? That would be a check, completely independent of the OS.
      My ComputerSystem Spec
  4.    30 Jul 2015 #4
    Join Date : Jul 2015
    Drexel Hill, Pennsylvania
    Posts : 31
    Windows 8.1 pro, Windows 10 Pro
    Thread Starter

    Quote Originally Posted by Mystere View Post
    Is this a new build? Have you ever run Windows 8.x on it? Did it see all memory? Have you tried re-seating the memory?

    I can assure you, the memory limits are accurate, and 32GB is fine with Windows 10 Pro.

    What chipset do you have? Have you installed all the necessary drivers?


    I have run 8.1 pro ( also what I am upgrading from) on the machine in question, I also have re-seated all the sticks,reset the bios ,removed any/all overclocks that were inplace, however after I regressed to Win 8.1 Pro all 32 GB are registering. The included screen shots are all while Win 10 Pro was installed and running, Both OS are 64 bit. The RAM DIMMs are dual channel 4x 8 Gb sticks of Gskill Ripjawz running at 1600MHz running on a Gigabyte 970A-D3 motherboard with a AMD 8120 CPU.
      My ComputerSystem Spec
  5.    30 Jul 2015 #5
    Join Date : Jul 2015
    Posts : 84
    Windows 10 Pro x64

    Are you using Nvidia's newest 353.62 drivers? It might be possible for bad drivers to take up a large amount of memory.

    Are you doing a clean install of Windows 10?
      My ComputerSystem Spec
  6.    30 Jul 2015 #6
    Join Date : Sep 2014
    Nashville, TN
    Posts : 3,143
    Windows 10 Pro

    Quote Originally Posted by Hellishdream View Post
    I have run 8.1 pro ( also what I am upgrading from) on the machine in question, I also have re-seated all the sticks,reset the bios ,removed any/all overclocks that were inplace, however after I regressed to Win 8.1 Pro all 32 GB are registering. The included screen shots are all while Win 10 Pro was installed and running, Both OS are 64 bit. The RAM DIMMs are dual channel 4x 8 Gb sticks of Gskill Ripjawz running at 1600MHz running on a Gigabyte 970A-D3 motherboard with a AMD 8120 CPU.
    Ok, so after you reverted, did you try the upgrade again?
      My ComputerSystem Spec
  7.    30 Jul 2015 #7
    Join Date : Jul 2015
    Drexel Hill, Pennsylvania
    Posts : 31
    Windows 8.1 pro, Windows 10 Pro
    Thread Starter

    Quote Originally Posted by owensdj View Post
    Are you using Nvidia's newest 353.62 drivers? It might be possible for bad drivers to take up a large amount of memory.

    Are you doing a clean install of Windows 10?

    I am using the updated Nvidia drivers , updated them prior to upgrading , also checked Gigabytes website for any updated system drivers and installed all that were available .

    At this time I have not performed the upgrade for a 2nd time. I am currently going through the system to make sure its not in anyway hardware related. I should be finished with this process soon and will post any changes here as soon as I can. Thank you all for your assistance in addressing this matter.
      My ComputerSystem Spec
  8.    30 Jul 2015 #8
    Join Date : Jul 2015
    Hampshire, UK
    Posts : 10
    Windows 10 Home

    The odd thing is that in the Task Manager shot it shows 'Hardware reserved: 8.0 GB'
    I just looked at mine (with 32 GB) and it shows 128 MB just there.
    So I'm wondering what could be set to reserve those 8 GB. Some sort of boost/turbo technology being enabled in the bios?

    **Edited to add** AMD Turbo Core does this sort of thing.
      My ComputerSystem Spec
  9.    30 Jul 2015 #9
    Join Date : Jun 2015
    Posts : 54
    Windows 10 Pro

    If you have the memory installed via your processor and it maches what the processor can handle then I would not worry about it and let Microsoft send out an update to fix it. If you have pushed it way over what the processor can handle then I'm not sure what to tell ya. Good luck. There is a reason Intel or your chip maker tells you what the max memory it can handle is. I'm an overclocker, but you have to be reasonable when overclocking. What chip are your running? What does the manufacture state the max memory usage is for that chip?
      My ComputerSystem Spec
  10.    30 Jul 2015 #10
    Join Date : Jun 2015
    Posts : 54
    Windows 10 Pro

    My mother board will let me run 32 gigs but my processor says it can only handle 16 max. If I wish to go with a different processor then I can take advantage of 32 gigs. What processor are you running? Just because you can put the memory in and run it does not mean it will work for ya. In fact 32 gigs takes more time to boot. What processor are you running?
      My ComputerSystem Spec

 
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