4 GB Installed 2 GB Usable Memory issue.

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  1. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       New #11

    ctdummy said:
    I just built a PC and installed Windows 7 Home Premium x64. My system shows 4 gigs of ram installed but only 1.99 GB usable. I'm not sure what else I can check here. I'm using an EVGA P55 LE with the latest bios.

    Latest Bios
    Memory remapping enabled
    Check MSCONFIG max memory isn't limited.

    I noticed that on EVGAs performance tool the memory is reading as single channel when it should read dual channel.

    I'm using a Radeon HD 4890 1GB DDR5
    OCZ Low Voltage Platinum PC-10666 Dual Channel 2GBx2 DIMMS

    I've been scouring the internet in search of some sort of answer. Please Help!
    Force windows 7 to set memory at

    5997 to 8143 as you have to set at x1,5 the amount of 4Gb Ram aviable,

    In the System Properties tab=> Avanced System Parameters tab=>Performances=>Modidy...

    Don't let automatic setting. Don't use any LargeSystemCache in the registry

    Anyway, on 4095 ram only 3998 are there, 97 ram amount are reserved for Hardware purpose.
    Attached Thumbnails Attached Thumbnails 4 GB Installed 2 GB Usable Memory issue.-grab0000-copie.jpg   4 GB Installed 2 GB Usable Memory issue.-grab0002-copie.jpg  
    Last edited by NoN; 26 Feb 2010 at 21:45.
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  3. pbcopter
    Posts : 1,872
    Windows 10 Pro x64, Windows 8.1 Pro x64, Windows 7 Ultimate x64 SP1,
       New #12

    If you are using Windows 7 x64 then it should show 4GB installed under System especially if memory remap is set, with no mention of usable. It will only show usable if something less than the full amount is usable.
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  4. stormy13
    Posts : 6,879
    Win 7 Ultimate x64
       New #13

    What is the total ram it shows in the bios? If it is anything less than 4 GB then the sticks are in the wrong slots (manuals have been getting it wrong from years), or you need to look through the bios to find something to do with memory remapping.
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