4gb ram but only 3.25 usable


  1. vatz
    Posts : 27
    Windows 7 Ultimate 64bit
       New #1

    4gb ram but only 3.25 usable


    i got some new ram (4gb Corsair Dominator DDR2 PC2-8500 (1066), 240 Pin) and now it says only 3.25 is useable. my system spec is in my profile. any ideas?
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  3. Jonathan_King
    Posts : 13,354
    Windows 7 Professional x64
       New #2

    That is because you have the 32-bit version of Windows. Due to technical limitations, 32-bit can only address up to 4GB, but in practice, this number is lower. Upgrade to the 64-bit version and you will have access to all 4GB.
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