Windows no longer utilizes 8GB. Now only uses 4GB

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  1. Posts : 4
    Windows 7 Professional 64-bit
       #1

    Windows no longer utilizes 8GB. Now only uses 4GB


    This is odd. I have had my system now for just under a year and all of a sudden, my system is not utilizing 4GB of the 8GB on board.

    Steps I have taken:

    * Replaced all of the RAM.
    * Replaced the motherboard.
    * Checked BIOS settings.

    Been building my own PC's since 1993 and I have never seen this. My parts supplier is stumped. Microsoft support is useless.

    System Specs:

    *Intel DQ67SW Motherboard
    *Intel i5 650 3.2 GHz 4MB Cache
    * 4x 2GB DDR2 PC6400 SODIMM Modules
    * NVidia GTX480 1.5GB Video Card
    * Intel 30GB SSD Hard Drive (boot)
    * Western Dig 350GB Hard Drive (apps)
    * Western Dig 1TB Hard Drive (data)
    * Liteon Blu Ray Player/ DVD&CD Burner
    * Cisco AM10 USB Wireless Adapter

    I am defintely . Any suggestions would be appreciated.

    Thanks!
    Attached Thumbnails Attached Thumbnails Windows no longer utilizes 8GB. Now only uses 4GB-system-info.jpg   Windows no longer utilizes 8GB. Now only uses 4GB-task-manager.jpg  
      My Computer


  2. Posts : 2,528
    Windows 10 Pro x64
       #2

    Very interesting indeed. What specific motherboard, CPU, and RAM combination are in that machine specifically?
      My Computer


  3. Posts : 4
    Windows 7 Professional 64-bit
    Thread Starter
       #3

    *Intel DQ67SW Motherboard
    *Intel i5 650 3.2 GHz 4MB Cache
    * 4x 2GB DDR2 PC6400 SODIMM Modules

    I hope this helps.

    Thank you in advance!

    (PS - I tried the MSCONFIG trick - did nothing)
      My Computer


  4. Posts : 2,298
    Windows 7 Professional x64 SP1 ; Windows Server 2012 R2 Standard
       #4

    The 3.93GB Usable seems to be a possible problem ... Not 100% Sure

    Are you using Onboard Graphics? Clearly Not

    Have you checked your BIOS for a RAM Remap as this could help
      My Computer


  5. Posts : 740
    Windows 7 Ultimate x64
       #5

    I havent got one but read that the i5's on chip memory controler can handle 2 channels,AFAIK dual channel mode negates the fact that there 4 modules as it's installed as 2 channels of 2, Is dual channel mode enabled in the BIOS.

    I'm a little confused though as you have changed the Motherboard and the RAM, i'm assuming you have re-installed the OS.

    SODIMMS? Are you sure these fit in this motherboad.
      My Computer


  6. Posts : 4
    Windows 7 Professional 64-bit
    Thread Starter
       #6

    Checked the bios, step by step. The bios is seeing all 8GB. There is not the ability to remap RAM in the BIOS. I am really stumped. I am about ready to pull out a spare HDD and do a clean install and see what happens.
      My Computer


  7. Posts : 4
    Windows 7 Professional 64-bit
    Thread Starter
       #7

    Sub Styler said:
    I havent got one but read that the i5's on chip memory controler can handle 2 channels,AFAIK dual channel mode negates the fact that there 4 modules as it's installed as 2 channels of 2, Is dual channel mode enabled in the BIOS.

    I'm a little confused though as you have changed the Motherboard and the RAM, i'm assuming you have re-installed the OS.
    I took the unit over to the parts supplier and we put in a new Intel DQ67SW MB, and tried with the old RAM and NEW RAM, with no joy.

    I have not done a clean install yet. Way too much work to do right now to have my system down for a couple of days...

    At least right now, the machine works.
      My Computer


  8. Posts : 740
    Windows 7 Ultimate x64
       #8

    using this post will probably be of great benefit to your situation to use sysprep to reinstall the OS and keep most your files and settings.
      My Computer


  9. Posts : 10
    Windows 7 Professional 64 bit
       #9

    On the Task Manager window (performance tab), click on 'Resource Monitor' and select the memory tab... It might help you figure it out...
      My Computer


  10. Posts : 2,298
    Windows 7 Professional x64 SP1 ; Windows Server 2012 R2 Standard
       #10

    Also try refreshing your Windows Experience Index. I found that this got rid of my (X.YZ Usable) Label
      My Computer


 
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