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  1. #1
    Senior Member mark1978's Avatar
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    Default iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Good morning,

    I have an iMac, mid 2011, I bought this stick of RAM yesterday ( https://www.corsair.com/us/en/Catego...O4GX3M2A1333C9) which is a 4GB RAM stick however the Mac is only displaying 2GB. I have 2GB in the remaining slots. I do feel with this 4GB stick that the computer is definitely faster!! Anyone know what is going on??

  2. #2
    Computer Technician wainuitech's Avatar
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Try it with just the new 4GB, since the other slot has 2GB already, remove it.

    Some reasons memory doesn't detect are, Incompatible, bad RAM module, faulty / Dirty Slot on the motherboard, firmware issue.

    Some Computers can be really particular about what memory is used.
    Update / Upgrades = Replace old bugs with new ones.

  3. #3
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Reset the PRAM on the computer. Do this by booting up while holding down the options-command-P-R keys all at once until you hear a second set of boot chimes, then release the keys and allow the computer to boot normally.

  4. #4
    Senior Member mark1978's Avatar
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    If I attempt to do the PRAM, I only get a white screen, no second boot.... when I let go...it just boots up normally, I have attempted to take another 2GB out, leaving the 4GB in the row only while the other 2GB are in the bottom row to no avail, it continues to see it as a 2GB stick...

  5. #5
    Senior Member mark1978's Avatar
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    PRAM done.... no difference... displays 8GB, but has 10GB installed, all slots say 2GB

  6. #6
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Silly question but have you checked the labels on the new 4G to see that it actually 4g?

  7. #7
    Senior Member mark1978's Avatar
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Quote Originally Posted by Bryan View Post
    Silly question but have you checked the labels on the new 4G to see that it actually 4g?
    Actually I though5 the same thing however the link provided is the exact same RAM, 4GB

  8. #8
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    The link in the original post is for 2x2GB RAM modules, so only 2GB each.
    Are you installing 2 new sticks of RAM or just 1?

  9. #9
    Senior Member mark1978's Avatar
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    Default Re: iMac Mid 2011 - RAM issue - 4GB only displaying 2GB

    Quote Originally Posted by CYaBro View Post
    The link in the original post is for 2x2GB RAM modules, so only 2GB each.
    Are you installing 2 new sticks of RAM or just 1?
    Hey hello, yeah my understanding was that it was 4GB, Iíll just put up with it until I can get two same modules of ram 2x 4GB, that will solve the issue for sure

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