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Thread: GA-X58A-UD3R - Can only see 8GB of 12GB with Windows 7 Ultimate 64 bit




  1. #21
    Join Date
    Dec 2010
    Location
    Los Angeles, CA
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    2

    Default Re: GA-X58A-UD3R - Can only see 8GB of 12GB with Windows 7 Ultimate 64 bit

    Quote Originally Posted by Lsdmeasap View Post
    Most often this is a bent CPU Socket pin, CPU needs reseated, not enough/too much heatsink pressure or you are not using enough QPI/Vvtt voltage. If you think you are using enough QPI/Vtt (1.35+) then I would check the socket very closely, be super careful as a few users I know have bent things up just checking it out.

    It can also be faulty memory though, but this is usually not the case. Have you tested each stick on by one? Do that, test each stick one at a time in one slot, then test the next slot with all three, then the next. White slots only.
    Thank You Admin,

    I have 12GB of Corsair Dominator DDR3 1600Mhz Ram, I tried everything and then I came across your forum. The issue was exactly as described by previous members I could see all 12GB in BIOS and in Windows, however only 8GB were usable.

    Tracking back through my upgrades and various steps that I took along the way I remembered that I recently did a minor update from i7 930 to 950, indeed a minor update that cost me one of the pins in my CPU to be slightly bent. Thanks god for your forum, cause I was going nuts doing everything I could think of and seeing all 6 Memory chips in BIOS and in CPU-Z, yet not being able to utilize all of them.

    To make a long story short, I took out the CPU as you suggested and carefully inspected all of the pins, one of the pins was slightly out of place. I used my pocket knife to carefully bend it back in place. Next, I only installed 3 memory chips first, to make sure that they would POST fine. Entered BIOS and updated the memory settings to PROFILE 1 settings (that automatically found Extreme Memory Profile with 1600 Mhz and 1.65V) then I would reboot my PC and add 1 memory chip at a time, until I was done adding all 6 chips = 12GB.

    I allowed the computer to fully boot into Windows and verified under System Settings that indeed I had 12GB and all of which was now usable. Finally, I re-ran my Windows Experience Index (WEI) and got a score of 7.8

    Result, I am a happy camper now :-)

    THANK YOU VERY MUCH!!!

    p.s. something is up with the speed of my new SATA3 CRUCIAL C-300 SSD Drive, WEI index score has dropped from 7.9 to 5.9 now sure what it is, that is my next step to fixing my gaming machine.

  2. #22
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
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    9,250

    Default Re: GA-X58A-UD3R - Can only see 8GB of 12GB with Windows 7 Ultimate 64 bit

    are you running trim to keep ssd performing well? running it in ahci mode?
    Gigabyte z77x UP4-TH F11c Modded Bios
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  3. #23
    Join Date
    Dec 2010
    Location
    Los Angeles, CA
    Posts
    2

    Default Re: GA-X58A-UD3R - Can only see 8GB of 12GB with Windows 7 Ultimate 64 bit

    Thank you my friend, funny enough I had the AHCI mode enabled, but somehow the score went down. So, this time I went into the Advanced Tools, and ran the test using Clear All Windows Experience Index Scores and re-rate the system, this time the SSD did it's job and went back up to 7.9 :-)

    Now I am 100% happy camper!!! Thank you once again for such a speedy reply.

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