iMac Memory Upgrade question

Discussion in 'iMac' started by BeedaLou, Mar 4, 2017.

  1. BeedaLou macrumors newbie


    Mar 4, 2017
    Just bought a new 27 inch imac retina. I want to upgrade the memory. Specs say to use 1867mhz, but 1866mhz is cheaper. Can I use 1866? If so, will it work alongside the 1867mhz that's already there?
  2. marzfreerider macrumors member

    Jun 13, 2014
    You can buy that 1866 RAM, I bought this RAM from Kingston and it said 1866. On the about this Mac its says 1867.
    I've been using it for 3 months with no problems.

    The specs are:

    CAS Latency CL11
    Number of Modules 2 x 8 GB
    Signal Processing Unbuffered
    Form Factor SoDIMM
    Length 2.7"
    Memory Speed 1866 MHz
    Memory Size 16 GB
    Memory Technology DDR3L SDRAM
    Width 1.2"
    Memory Voltage 1.35 V
    ProductId 1029992813

    General Information
    Brand Name: Kingston
    Manufacturer: Kingston Technology Company
    Manufacturer Part Number: HX318LS11IBK2/16
    Manufacturer Website Address:
    Product Line: HyperX Impact
    Product Name: Impact SODIMM - 16GB Kit* (2x8GB) - DDR3L 1866MHz CL11 SODIMM
    Product Type: RAM Module
    Physical Characteristics
    Form Factor: SoDIMM
    Length: 2.7" (67.6 mm)
    Width: 1.2" (30 mm)
    Technical Information
    CAS Latency: CL11
    Memory Size: 16 GB
    Memory Speed: 1866 MHz
    Memory Technology: DDR3L SDRAM
    Memory Voltage: 1.35 V
    Number of Modules: 2 x 8 GB
    Signal Processing: Unbuffered

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