New RAM causing kernal panics

Discussion in 'iMac' started by mailliwwilliam, May 19, 2011.

  1. mailliwwilliam macrumors newbie

    Joined:
    May 19, 2011
    #1
    Hello, I'm new to Mac and new to the forum.

    I just bought a new 2011 27" iMac and the first order of business was to upgrade the RAM.

    I ordered 8gb of Crucial 204 pin SODIMM, DDR3 PC3-10600 and installed it into the the two open slots and left the original 2 x 2gb sticks in the factory location. Easy enough, took a couple of minutes to install and power up the Mac.

    I checked to ensure the 12gb was showing up under the "About this Mac" and it showed 12. I started opening items on the dock and Safari, App Store, and iTunes all had kernal panic's and would not open.

    After a couple attempts to ensure the ram was seated properly I changed locations of the RAM. I swapped the 2x4gb stick with the 2x2gb sticks and now everything is working fine.

    After researching the issue, I haven't found anything that says the higher capacity RAM has to be in a certain slot.

    Has anyone had this issue, or is it confirmed that higher capacity ram has to be in a certain slot? Or is it still a possibility the RAM I received is defective?
     
  2. phlydude macrumors regular

    phlydude

    Joined:
    Jun 21, 2010
    Location:
    Newark, DE
    #2
    probably a seating issue if everything is working fine now...if you are getting errors again check to make sure you have the correct RAM and then call Crucial for defective replacement

    I don't have Crucial but installed G.Skill in the 2 open slots and have had ZERO issues...as long as you install in pairs, I don't think it matters where you install the larger capacity RAM, 1st or 2nd row
     

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