Question about 3GB RAM limit on old iMacs

Discussion in 'iMac' started by Norkusa, Mar 29, 2012.

  1. Norkusa macrumors member


    Nov 25, 2010
    Grand Rapids, MI
    I currently have a 20" late-2006 iMac and plan on upgrading as soon as the new iMac's come out later this sping/summer. I have 2 GB of RAM installed (1GB x 2) but I'd like to have 3GB total because I need to use Lightroom 4 and have it running at bearable speeds.

    Is it better to have an even amount of memory in each slot than an odd amount? Was planning on getting a single 2GB stick so I'll have 2GB + 1GB, but I read somewhere that it runs better when you have the same amount in each slot. Is that true?
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Your iMac supports 4GB of RAM, with some limitations:

    iMac "Core 2 Duo" 2.33 20-Inch Specs (Late 2006, BTO/CTO, iMac5,1, A1207, 2118) @

    You can find specs on all Apple products, including maximum RAM:
  3. Intell macrumors P6


    Jan 24, 2010
    While you can install 4Gb, you'll only be able to use 3.3Gb of it. You'll have a slightly faster system if you install a matched pair of 2x2Gb sticks.

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