Ram Corsair & Hynix in iMac late 2013

Discussion in 'iMac' started by nonamen79, Mar 1, 2015.

  1. nonamen79 macrumors newbie

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    Mar 1, 2015
    #1
  2. Chippy99 macrumors 6502a

    Joined:
    Apr 28, 2012
    #2
    I'd be concerned about using that memory.

    Apple-supplied memory has a CAS latency of 11. This memory is also CL11, which is what you want. However, if the specs are to be believed, the SPD settings are CL9. This is fine if you use the memory on its own, or in a motherboard where you have manual control of the memory timings - neither of which applies to you.

    If you install CL9 memory in an iMac at the same time as other memory, the iMac will normally try to determine the maximum speed at which all modules can run CL9. This will be 1333MHz for your Apple Hynix memory. So there's a very real possibility that installing this Corsair ram will make your 24GB run at 1333MHz.
     
  3. nonamen79 thread starter macrumors newbie

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    Mar 1, 2015
    #3
    Thank you.
    if I still want to keep Hynix RAM, I have to find a memory which the SPD and test CL are 11, right?

    Which kind of specific memory I can install with?
     
  4. Chippy99 macrumors 6502a

    Joined:
    Apr 28, 2012
    #4
    Crucial sell memory specifically for iMacs, and are generally recommended.

    http://uk.crucial.com/gbr/en/imac-(27-inch,-late-2013)/CT4951620
     
  5. nonamen79 thread starter macrumors newbie

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    Mar 1, 2015
    #5

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