RAM Compatibility Question

Discussion in 'Mac mini' started by DTphonehome, Dec 9, 2012.

  1. DTphonehome macrumors 68000

    Joined:
    Apr 4, 2003
    Location:
    NYC
    #1
    Hi all,
    I am trying to upgrade the RAM in my early 2009 Mac Mini. The standard memory is PC3-8500. Knowing that you can usually use faster RAM (although at lower clock speed), I saw a deal on PC3-12800 RAM, so I tried to use that. After the installation was completed, upon booting up I got an error of three loud beeps. Apparently, this indicates a RAM issue.
    So, is my new RAM incompatible with the early 2009 Mac Mini? In my experience, it's okay to use faster clock speed RAM in a slower system. So why isn't it working here?
    Thanks for any help!
     
  2. philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #2
    what size are your sticks 4gb or 8gb each?
     
  3. DTphonehome thread starter macrumors 68000

    Joined:
    Apr 4, 2003
    Location:
    NYC
    #3
    They're 4GB each.
     
  4. philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #4
    well they could work but they don't. it is a risk to put in out of spec ram. did you try just one stick? I ask this because the 2009 minis can't always handle more then 4gb ram. apple had an efi for them to go to 8gb ram. so your problem could be your machine did not get that update.


    this is the 2009 mac mini firmware update


    http://support.apple.com/kb/DL888

    your mini needs this to run 8gb. now if you have this then the sticks just do not work.
     
  5. DTphonehome thread starter macrumors 68000

    Joined:
    Apr 4, 2003
    Location:
    NYC
    #5
    I tried using just one module, but that didn't work. I also tried resetting the PMU; no luck. I just decided to replace the 4 GB of RAM that were already in the Mac Mini, and send back the new RAM.
     

Share This Page