Which RAM is suitable? 1866 MHz or 2133 MHz DDR3L?

Discussion in 'MacBook Pro' started by khaidir77, Jul 18, 2017.

  1. khaidir77 macrumors member

    khaidir77

    Joined:
    Jan 25, 2016
    Location:
    KUALA LUMPUR
    #1
    Which RAM is suitable? 1866 MHz or 2133 MHz DDR3L?
    Hi there,

    I got these 2 pairs of RAM:

    • 1866MHz DDR3L - 8 GB x 2 Kingston HyperX Impact Black
    • 2133 MHz DDR3L - 8 GB x 2 G.Skill RipJaw
    Can someone tell me which one is suitable for my system: MacBook Pro 15" 2.6GHz i7 (Mid 2012)?

    Also running with two 2TB Samsung 850 EVO SSD in a RAID 0 setup.
     
  2. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    If you must use out-of-spec RAM, then the Kingston would be a better choice between the two. (Not your best choice, imho, as I have had "challenges" with Kingston RAM in the past
    Better, in my opinion, would be to use the specs that Apple calls for: DDR3-1600MHz 204 PIN SODIMM
    DataMemorySystems has great support for the Mac.
    https://www.datamemorysystems.com/a...2-6ghz-15-md104ll/a-mid-2012-memory-upgrades/
    (Good prices, too...)
     
  3. Patcell macrumors 6502

    Joined:
    Aug 8, 2016
    Location:
    Bergen County, NJ
    #3
    As mentioned, your best option is to stick with the original spec (1600mhz DDR3). Putting in higher clock RAM than supported will at best under-clock to 1600mhz, and at worst crash the system.
     

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