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Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

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  • Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

    Hi, i have a question.

    Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

    of course, integrated graphics was disabled.

    like this.



    anyone have this problem?

    many users experience this problem, in my online community.

    + also, i think this board have compatibility issue. some users who using gtx 750, 280x and latest graphics cards, complain 'reboot' problem. they said visit local customer center, but can't solve this problem, just exchange new boards, but same problem happens.
    Last edited by realslow; 06-09-2014, 05:10 AM.

  • #2
    Re: Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

    Interesting. Mine has 16GB but shows only 15.9GB available. Never noticed before.....
    Maximus 8 Hero/6700K @ 4.8/4x4GB LPX @ 3200 15-17-17-36 CR1
    Case Labs SM8 w/dual pedestals / Custom water w/ acrylic pipe / Light box
    PowerColor 390Xw/EK block / Samsung 840 Pro 256GBx2 RAID 0 / 128GBx1 SSD's | 3 HDD's / DVD burner
    Dual Aquaero 5 Pro controllers for pumps & fans / FC9 for led's only 2xD5 pwm w/Bitspower tops - MCP35x2 - 3x480 rads/1x240 rad/AP15 fans / EK supremcy
    Seasonic Platinum 1000w custom fabbed/sleeved psu wiring by me

    Wifes: Z77X-UD5H / 3770K w/c with Raystorm copper block & 2 Rads/ Kingston HyperX RAM / Switch 810 case/ PowerColor AX7950 w/EK block
    HTPC: Z68 Pro3 M / 2105

    SOLD:Z97X-UD5H /4790K/F11b mod BIOS/[email protected] 4x4GB Kingston Genesis KHX24C11X3K4 2400 RAM 11-13-13-30
    SOLD:Z87X-UD5H /4770K

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    • #3
      Re: Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

      Open Windows Task Manager and check in Performance and Processes.....
      Also Resource Monitor....Physical Memory....(Hardware Reserved 88 MB).


      Edit;
      I have finally found the setting of cancellation system built into the bios screen.
      Now I have a full 8GB.

      Thanks everyone for the help.
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      Last edited by stasio; 06-09-2014, 09:48 AM.

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      • #4
        Re: Z97X-UD5H, 8GB RAM was installed, but only 7.88 GB usable on Win7

        first of all, thanks for reply

        i said
        of course, integrated graphics was disabled.
        like this,


        F5 BIOS


        F7 BIOS


        Hardware reserved: 120MB


        but, when 16GB was installed. it shows 16.0GB fully.


        i think this problem was not always appear. (i'm not 100% sure)
        Last edited by realslow; 06-09-2014, 12:03 PM.

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