Buying RAM. How many pins?

Discussion in 'iMac' started by mkrndll, May 9, 2011.

  1. mkrndll macrumors member

    Joined:
    May 3, 2011
    #1
    Hi,

    I'm trying to buy more RAM for my 2011 iMac (the new one), but I don't know exactly what I have to get.

    Is 4 tablets of 4Gb DDR3 SDRAM 1333Mhz the best I can get for my iMac?

    How many pins does it have to be?

    Should I put them all the same or can I keep the 2 2Gb that I have and only buy 2 of 4Gb each or will I have performance issues?


    Thanks for your help!
     
  2. theSeb macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #2
    204 pins

    The full info is on the Apple website

    The iMac (Mid 2011) computers have four SDRAM slots in the bottom of the computer and come with at least 4 GB DDR3 SDRAM installed as two 2GB DIMMs into two slots.

    The maximum amount of RAM you can install in your computer is 16 GB (a 4 GB SO-DIMM in each slot).

    You can use any Small-Outline dual inline memory modules (SO-DIMMS) that meet all of these criteria:

    PC3-10600
    Unbuffered
    Nonparity
    204-pin
    1333 MHz
    DDR3 SDRAM
    You can use RAM module sizes of 2 GB or 4 GB in each slot.

    DIMMs with any of the following features do not work in the iMac (Mid 2011):

    Registers or buffers
    PLLs
    ECC
    Parity
    EDO RAM
     

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