Upgrading Memory on my 27 inc Imac

Discussion in 'iMac' started by ELtoro2010, Jan 10, 2012.

  1. ELtoro2010 macrumors newbie

    Jan 9, 2012
    Hello everyone

    I`am New to mac
    so i bought a 27 Imac and its came out with 4 gig of ram.
    yesterday i purchase an 8 gig ram from macsale.com my question is it o.k to keep the stock ram installed with the new ram or may it cause some problems?
  2. simsaladimbamba

    Nov 28, 2010
    It is okay to use the stock 4 GB RAM and have 12 GB RAM.


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  3. ELtoro2010 thread starter macrumors newbie

    Jan 9, 2012
    But the New one is (owc) and the Stock is (Samsung)
  4. leman macrumors G3

    Oct 14, 2008
    Yes, it may cause some problems. You'll just have to try it out. It is very likely to work well, but it may also lead to crashes. For example: I had a problem with Corsair RAM - when paired with original Apple Samsung RAM, my iMac was randomly crashing. I have removed the Samsung RAM and its stable even now. Other people reported stable machines with exactly the same Corsair RAM mix. So its a hit and miss case :)
  5. ELtoro2010 thread starter macrumors newbie

    Jan 9, 2012
    o.k thank you all for you`r advice i try to mix the stock ram with the owc ram. hope its works :D:D:D:D wish me luck
  6. hifoo45 macrumors member

    Apr 29, 2010
  7. DavoteK macrumors 6502

    Jan 5, 2012
    As long as they are both the correct clock speeds and type of ram, you'll be fine. I've done the exact same thing with mine (upgraded from 4Gb to 12GB) and it runs like a dream.
  8. BasilFawlty macrumors 6502


    Jun 20, 2009
    New Mexico
    I recently installed 8Gig of OWC memory with the stock 4GB Samsung in my mid-2011 27" iMac and it works great. No worries.
  9. GibMcFragger macrumors newbie


    Jan 11, 2012
    Vancity, BC
    I just put another 8GB (2x4GB) of Corsair RAM in mine and it works fine with the OEM RAM, for a total of 12GB.

    NOTE: I don't know why, but if you are going to install 2x4GB sticks and keep your OEM RAM, move the 2x2GB Samsung sticks down to the lower slots and install the new RAM in the top slots.

    I read somewhere that it wouldn't POST if you didn't do it that way. I can't confirm this myself as I just did it when I install my Corsair RAM. :cool:
  10. EdMan macrumors 6502


    Oct 17, 2011
    I recently added 8G of OWC ram to my mid2011 21.5 iMac along with the stock 4G and it seems to be working just fine. I too put the new RAM in the top slots and the stock RAM in the bottom. System recognized it right away and no problems so far.

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