Is this the correct ram for upgrade

Discussion in 'iMac' started by tommy0614, Jan 24, 2013.

  1. macrumors member

    Jan 7, 2013
    I have the new 27 iMac with 3.4 processor. I want to install four (4) sticks of Crucial ct3650282 ram for a total of 32. Is this the correct Crucial part number? Thank you.
  2. simsaladimbamba

    Nov 28, 2010
  3. macrumors 6502a

    Mar 18, 2012
    I didnt want to start another thread so I thought I could bump this.

    I want to buy the new iMac 21.5 inch 2.9ghz.
    upgraded to 3.1ghz.
    upgraded to fusion drive.

    3.1GHz Quad-core Intel Core i7, Turbo Boost up to 3.9GHz
    8GB 1600MHz DDR3 SDRAM - 2x4GB
    1TB Fusion Drive
    NVIDIA GeForce GT 650M 512MB GDDR5
    Apple Magic Mouse
    Apple Wireless Keyboard (English) & User's Guide
    Accessory Kit

    How do I add memory without spending the extra $200 on apples website.

    Lets say I want to have 16gb or 24gb of memory.

  4. macrumors regular

    Nov 17, 2010
    21.5 does not have user accessible ram ports like the 27
    either order from apple or open up the imac yourself and i believe there's guide for that on google

  5. Giuly, Feb 3, 2013
    Last edited: Nov 22, 2014

    macrumors 68040


    If you're replacing all four of them, you might as well go with the Kingston HyperX Plug'n'Play, which are faster than the stock RAM and the Crucials.
  6. macrumors member

    May 18, 2012
  7. macrumors regular

    Jan 14, 2013
    Melbourne, FL
    Yup, you should be able to just pop those in the empty slots for 24GB. They are CL11 so you'll be fine. Just make sure you don't mix CL9 with CL11 (which is stock), because some people have had issues with running CL9 and CL11 together, where it causes the RAM to only run at 1333MHz rather than 1600MHz. I really like Crucial RAM, it's quality, made in America, they guarantee it, and make it easy as hell to find the right RAM for your system.
  8. macrumors regular

    Feb 24, 2010
    kentucky...Go Cats
    When you say faster than crucial's, how much faster, and when loaded out at 32GB on the new iMac, are we talking that much of a difference.
  9. macrumors regular

    Dec 29, 2007
    Cape Cod, MA
    cl9 vs cl11 means 2 nanoseconds faster... i think i saw some benchmarks showing less than 100 points in geekbench... might not be worth the extra cash between 4 sticks of CL9 vs 4 sticks of CL11...
  10. Giuly, Feb 3, 2013
    Last edited: Feb 3, 2013

    macrumors 68040


    CL9 vs CL11 means that it takes 9 or 11 clock cycles for the data to be ready to be read or written. At 1600MHz (=cycles per second), that comes out to 20.8% more accesses, or bandwidth as it transfers the same amount of data, but 20.8% more often per second.

    AnandTech has real numbers on that, along with an in-depth explanation how this stuff works.
  11. macrumors regular

    Fried Chicken

    Jun 11, 2011
    It says it's 240-pin RAM, doesn't the iMac take 204-pin RAM?

    NVM, just looked it up on newegg.
    It looks like it's wrongly listed on amazon.
  12. macrumors 68040


    It's a typo, that is 204-pin SODIMM - look at the reviews and the title.

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