21.5" mid 2010 iMac RAM upgrade.

Discussion in 'iMac' started by Technaphobe1, Nov 7, 2015.

  1. Technaphobe1 macrumors newbie

    Joined:
    Nov 7, 2015
    Location:
    Macclesfield, U.K.
    #1
    I am hoping to upgrade the RAM on my 21.5" mid 2010 iMac which is currently running on 4gb's but has a capacity to take up to 16Gb's. I was told that Crucial are the best people to purchase from and have been onto their website to have a look. I can buy either 4 or 8Gb's in packs of 2. My iMac has 4 slots to take the memory and my question is, should I purchase a double pack of 8Gb's which will mean that 2 slots on my iMac will be left empty or do I need to fill all 4 slots using 4Gb memory things/cards? Simply put, will my machines performance/health be affected by leaving 2 slots empty? Any advice greatly welcomed. Thanks
     
  2. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    The choice is yours.
    You _already_ have two slots empty - your Mac shipped that way.

    If you look at the Crucial web page that lists compatible upgrades for your iMac, you will see that no 8GB x 2 kits are listed, only 2GB x 2, or 4GB x 2, (or singles). No combinations with 8GB sticks listed.
    As far as I can find out, the slots in your iMac won't recognize 8GB sticks.
    If you want 16GB, then purchase 2 4GB x 2 kits. You won't have any empty slots then.
     
  3. Richdmoore, Nov 7, 2015
    Last edited: Nov 7, 2015

    Richdmoore macrumors 68000

    Richdmoore

    Joined:
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    Location:
    Troutdale, OR
    #3
    Sorry, I made an error. 16gb is max ram on that model.
     
  4. Richdmoore, Nov 7, 2015
    Last edited: Nov 7, 2015

    Richdmoore macrumors 68000

    Richdmoore

    Joined:
    Jul 24, 2007
    Location:
    Troutdale, OR
    #4
    sorry, I was in error. 32gb is for the 27" i5/i7 2010 Mac only. I would max the ram with 4x4gb.
     
  5. Technaphobe1 thread starter macrumors newbie

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    Nov 7, 2015
    Location:
    Macclesfield, U.K.
    #5
    Oh yes your right, I completely misread it on the website! Thanks so much, I will go for the 2 4GB X 2.
     
  6. Technaphobe1 thread starter macrumors newbie

    Joined:
    Nov 7, 2015
    Location:
    Macclesfield, U.K.
    #6
    Thanks Richard, I'm sorted now and going for the 4GB x 4 as suggested.
     

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